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/sci/ - Science & Math


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7688221 No.7688221[DELETED]  [Reply] [Original]

Greetings, /sci/!

I have very good news. Our very own Hyperloop team, managed to get into the last 125 to compete at the SpaceX Hyperloop Design Weekend event!

The Leddit team is also accepted so it's going to be a battle to the end. Bring it!

It's been a crazy journey so far, and we are just beginning. The work load is going to get even heavier, with the low-level submission coming up and if we are selected, we are going build the damn pod itself!

Thanks for everyone who stuck around and contributed or joined the team and left, you guys have been here for us.

If any of you would like to join the team, just email at
>possessedmanager@gmail.com

We need assistance with:

>electrical motors
>fans+axial compressors
>material design
>linear accelerators
>navigation
>communication

GET
>hype
loop

>pic related: one of our Pod renders

>> No.7688244

>>7688221
how many people are in this

>> No.7688248
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7688248

>>7688244
currently 12 with 2 advisors

we are trying to get our former members back on the team

>> No.7688257

is there any easy work you guys need to do? I'm still a freshman in college and I would like to help but I'm pretty sure I can't contribute much.

>> No.7688259
File: 32 KB, 1366x768, air bearings at 4m chassis section on guidance rail.png [View same] [iqdb] [saucenao] [google]
7688259

>>7688257
what are you studying

>> No.7688261

>>7688259
General Engineering but planning on CS or Comp E

>> No.7688267
File: 129 KB, 1504x665, 4m chassis.png [View same] [iqdb] [saucenao] [google]
7688267

>>7688261
We have our Comp Sci member working on communications, would you be interested in that?

>> No.7688274

>>7688267
Yeah, but how is the workload? If the final design packet has to be done by 12/15/15 than I'm pretty much useless because I have all my finals that week.

>> No.7688277

Hey fags,

Good luck c:

bump

>> No.7688281
File: 434 KB, 1578x757, pod on bearings.jpg [View same] [iqdb] [saucenao] [google]
7688281

>>7688274
the deadline is 1/13/16, so you'll get acclimated to the work at hand until 12/15 and start delivering after your finals. how does that sound?
>>7688277
brofist

>> No.7688319

>>7688281
Alright sounds good. I have to sort out some stuff first so when I feel like I can contribute I'll send a email.

>> No.7688342
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7688342

>>7688319
you've got it

>> No.7688344

>>7688221
JC here

I'm glad things are going great!

What kind of help do you all need on material design? I may be able to help if it's something I know anything about.

>> No.7688348

>>7688248
Who are the advisors?

>> No.7688358
File: 47 KB, 744x420, basic-block-diagram.jpg [View same] [iqdb] [saucenao] [google]
7688358

>>7688344
Hey JC what's up!

Well the usual stuff - mostly related to weight, material strength and cost. We have a carriage+chassis structure, so the materials will vary accordingly.

Another important subject is ease of manufacturing - will be critical in the building phase. We will have about 6 months to finish it, less if you consider tests and even less if we'll build it outside of US

We're looking at Maglevs for materials currently, but any other idea is also welcome

>>7688348
1 Assistant Professor from Aero/Astronautical Faculty and 1 CFD specialist

>> No.7688404

>>7688358
Sounds great; I definitely feel you on the manufacturing part. That'll be tough. I'll email you sometime soon!

>> No.7688416

>chemeng
>worthless to this project and pretty much everything that isn't process design

I-I know a little bit of material science and metallurgy ( ._.)

welp

>> No.7688422

>>7688221
biology major, applying for med school here.

can't contribute, but just wanna say congrats.

ALL ABOARD THE HYPE LOOP

>> No.7688427

>>7688416
Honestly they're probably gonna go with aluminum, so metallurgy might be handy

>> No.7688451

>>7688342
>air compressor
Isn't this supposed to be in a vacuum?

>> No.7688466
File: 93 KB, 300x184, 1448252020090.png [View same] [iqdb] [saucenao] [google]
7688466

>>7688221
I said it before and I'll say it again:

>doing volunteer work for a billionaire
>they do it for free

>> No.7688469
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7688469

>>7688416
We have a ChemEng member who's doing thermodynamics work, perhaps you could help him?
Also as >>7688427 said mat sci help is sorely needed. The track on the ground and the guidance rail is indeed aluminum
>>7688422
Thanks bro
>>7688451
It's near vacuum, the white paper has the internal pressure at 100 Pa, but SpaceX allows a range of 0.02 Psi to 14.7 Psi(1 atm) for the competitors. We've chosen 2 psi which will be compressed up to 60 psi for air bearings, and 1 atm for ventilation
Pic related a cheeki snapchat drawing on mobile

>> No.7688470
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7688470

>>7688466
Ayyy
I was wondering about you, where have you been!

>> No.7688476

>>7688427
ehhh, metallurgy in this case would probably be more acceptable from an actual metallurgist or from a mechanical with met background

>> No.7688482
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7688482

>>7688476
We'll have to do with what we have m80. Send an email pls

Have a grazing chassis

>> No.7688487

>>7688482
>>7688469

a few questions

>time commitment?
>link to details about the competition pls
>when do things need to be wrapped up
>what thermo and/or mat sci do you need?

>> No.7688501
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7688501

>>7688487
>time commitment?
Depends on you, but you'll probably be helping on the side. We don't expect anyone to commit full time obviously
>link to details about the competition
spacex.com/hyperloop
>when do things need to be wrapped up
Around 1/1/16 because we'll start documentation from that point until 1/13 which is the Final Package submission deadline
>what thermo and/or mat sci do you need?
Currently we have Process Flow Diagrams as given here >>7688342
Material Sci requirements are listed here >>7688358
I'm a Civil Eng so for more detailed discussion I'll have to refer you to members working on these

>> No.7688521

>>7688267
Another CS student here, what's exactly "communications"?

>> No.7688531

>>7688501
So:

> maybe some more rigorous calculations / simulations on the compressors and heat exchangers

>material & manufacturing selection with regards to timing & feasibility

Who's building it? is there a fab shop taking care of this, is it being built on a university campus, etc?

Where's the money coming from to build it? I'm currently reading the the details of the contest but haven't come across any of that yet.

>> No.7688550

>>7688221
>/sci/tards may have a hand designing this shit
Okay, I will never ever step into that thing even if they actually build one in my state.

>> No.7688606

Hey, I'm only like 2 hours away from college station. Do you by chance need a presenter? I only took a couple physics classes in college so I don't think I'll be of too much use to you guys.

>> No.7688613

>>7688221
Nice going faggots, good luck.

>> No.7688649

>>7688531
>Who's building it? is there a fab shop taking care of this, is it being built on a university campus, etc?
Currently we're in talks with GE to use their former 'Garage' area in my university, and that's the most likely. However we'll explore options building near Hawthorne, CA if opportunity arises once we're there.

>Where's the money coming from to build it?
SpaceX is awarding sponsorship to successful teams in the Design Weekend through third parties, pic related. However we are exploring our own sponsorship options, via University funds, foundations, VCs (we're accepted to an incubator)
>>7688550
wise
>>7688606
SpaceX wants the team lead to present personally so that's not possible. But if you'd stop by for a meetup that'd be great
>>7688613
Thanks bro

>> No.7688650

I wish I hadn't failed some courses so I could help you guys.

>> No.7688693

>>7688521
To quote:
>We want to ensure that teams don’t become ineligible to launch due to a real-time communications issue and that teams don’t devote disproportionately high effort to their communications system. Thus, we are looking to greatly simplify the system by:
>1. Reducing the number of Access Points from four to one (avoids having to switch AP’s during flight)
>2. Providing SpaceX-tested communications hardware for the Pods. We will provide a Network Access Panel (NAP) for your Pod, which will include the necessary antennas (see page 2 of attachment for top-level schematic). The NAP will have been well tested in the tube before the competition and configured to work on the provided network. The interface to the NAP will be a DB9 connector (power) and an RJ45 connector (data). It is not required to use the NAP, but it is highly recommended.

Communications
Connectivity to the Pod will occur via an Ethernet network bridged between the Staging Area and the Pod itself. SpaceX will provide all infrastructure for this bridge network. Teams will interface with this infrastructure from the Staging Area and directly on their Pod.  Bandwidth to the Pod will vary but expected bandwidth requirements should not exceed 20Mbps.  Network latency between the Pod and staging area is expected to remain <10ms.  or in the tube.
(1/2)

>> No.7688718

Network access to the Pod is expected to remain continuous while the vehicle is in the staging area or in the tube. In the event of the loss of network connectivity, the Pod should enter a safe state.  Team equipment will only be allowed on this network when they are the primary team on the track. This is intended to prevent interference between teams.  Teams using their own communication systems outside of the tube shall not overlap with 802.11g Channel 11 (2462MHz). IP Addressing Teams are allocated a static 8 bit subnet 192.168.1.0/24. Teams may allocate IP addresses in this subnet as they like. There will be no DHCP or DNS servers on this network. There will be no external network access on this network. Teams shall not bridge this network or provide remote access to this network.

(2/2)

>> No.7688724

>>7688718
Staging Area Network Access
An Ethernet 15 port switch will be present at both the ingress and egress staging areas. These two network switches will be the only network access points to the Pod. Teams may determine how to allocate these ports. Pod Network Access A 12” x 8” x 1.5” (WxHxD) Network Access Panel (NAP) will be provided to teams in the staging area with all necessary network bridge equipment. Teams are to mount the NAP perpendicular to the track surface with the panel facing to the rear of the Pod. There should be no metallic obstructions above or to the rear of where this panel is mounted on the vehicle. Teams should provide 6-32 mounting holes in locations shown on the network access panel drawing. A 0.25-inch clearance is expected below the NAP. The NAP will weigh approximately 3 pounds. The panel will have a DB9 Male bulkhead connector for power. The Pod should provide a 9-36VDC source to the panel. The pinout is provided on the network access panel drawing. The panel will also have a RJ45 Ethernet socket teams are expected to plug their Pod network into
(3/2)

>>7688521
>>7688261

>> No.7688726
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7688726

>>7688693
>>7688718
>>7688724
Pic related

>> No.7688738

>>7688221
Just like to say congratulations.

>> No.7688743
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7688743

>>7688650
You're alright anon

>> No.7688747
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7688747

>>7688738
Thanks

>> No.7688994
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7688994

Bump

>> No.7689000
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7689000

>>7688649
>SpaceX is awarding sponsorship to successful teams in the Design Weekend through third parties, pic related
Forgot the pic

>> No.7689025

1. What is this
2. How can I help beat leddit

>> No.7689192
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7689192

>>7689025
I'm glad you asked anon!

>1. What is this
Hyperloop is a concept brought forward by Elon Musk, co-founder of PayPal and Tesla Motors and founder of SpaceX. It's basically a train going inside an evacuated tube (near zero pressure but not vacuum). The planned operational speed is around 1 Mach and the Hyperloop Pod (the train) is thought as an efficient transport method over long distances around 350 miles / 500 kms
What we are doing is designing that pod, since SpaceX has announced a competition back in the Summet 2015. The team we've assembled from /sci/, although got depleted and had to be reinforced with non-sci members, have managed to make it to the Design Weekend - finals of the design stage basically. We're going to present our final designs there, and if accepted, we'll build the pod.
>2. How can I help beat leddit
At this stage, by joining the team. For that you can check if you can provide the required help as written in >>7688221.
If not, no worries, we're now starting to build a nice website and making ourselves visible on the social media. Publicity is the bread and butter of Leddit's team, they are all media and we'll need to outdo them in the publicity as we're nearing the Design Weekend. Stay tuned

>> No.7689388
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7689388

bump

>> No.7689787
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7689787

Bump

>> No.7689798

Do I need to have an Aeorspace degree to join the team?

>> No.7689860

>>7688221

I have a background in electromechanical engineering and computer science, worked on a cyclotron and linear accelerators (superconductors, cryopumps, etc), and would love to work for you.

But between my investment protfolio and my two startups and my pet project I don't have much time :(

but I'd love to stay in the loop (heh). do you have a twitter or something?

>> No.7689961
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7689961

>>7689798
not at all, I myself am a Civil Engineer. also this is a student competition but you can apply as a graduate at this stage
you can find the required fields in the OP >>7688221

>>7689860
If you could at least stick around to provide guidance with the linear accelerators that would be awesome. We'll bear the grunt of the work anyway. Just shoot an email, I promise I won't tire you :)

We have a Twitter account although it's University oriented (in accordance with the competition) and 4chan isn't mentioned although you can clearly see Sci there

@ITUHyperloopSci

>> No.7689976

I really find this all interesting. I'm a sophomore studying computer science at SDSU, how could I help?

>> No.7689984
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7689984

>>7689976
see

>>7688267
>>7688521

>>7688693
>>7688718
>>7688724

>> No.7689986

Might actually be interested as i have little workload this semester. Third year mech e, got any idea where I could help?

>> No.7689987
File: 837 KB, 1319x990, design sketch.png [View same] [iqdb] [saucenao] [google]
7689987

>>7689986
sure, please refer to the OP post >>7688221

>We need assistance with:

>electrical motors
>fans+axial compressors
>material design
>linear accelerators
>navigation
>communication

also other fields that you might be related to:
>>7688358
>>7688501

>> No.7690075

>>7688469
It'd be pretty cool to see stuff like this on my snapchat, fampai.

I'm not using my phone until my finals are over, but if you would add me, I'd enjoy the exposure to hard science again.

My snap is HJNas.

>> No.7690230

Sounds mildly interesting... I haven't looked into Hyperloop much though, to be frank.
>760 mph inside an enclosed tube filled with 100 Pa of air
Sounds like a recipe for shock waves. Is their any reason NOT to replace the air with rarified water vapor? It would be less dense AND have a higher speed of sound.

>> No.7690257

>>7688221
can you link the documentation spaceX provided, if any?

>> No.7690292

>>7690230
Cost?

>> No.7690325

This is like 2 months away?

How can you add people this late into it and not just spend the entire time getting them up to date?

>> No.7690330

>>7690230
The hyperloop paper is pretty short

original paper
http://www.spacex.com/sites/spacex/files/hyperloop_alpha-20130812.pdf

pod competition
http://www.spacex.com/sites/spacex/files/spacex_hyperloop_pod_competition.pdf

>> No.7690368
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7690368

>>7690330

>> No.7690396

>>7690325
Engineers thrive on procrastination.

>> No.7690403

Remember that the Turbo Encabulator will probably do the best job for measuring inverse reactive current in unilateral phase detractors with a display of percent realization.

>> No.7690508

>>7689987
Im absolutely incapable of doing any of that all on my own, I can help out with everything on that list under guidance of someone more knowledgable. Im very efficient at CAD drawing/prototyping and documentation though, got decent experience as a draftsman and similiar.

>> No.7690749

>>7690257
here
>>7690330

>> No.7690752

>>7690396
>>7690396
>>7690396
this unfortunately

>> No.7690773

>>7690075
i only use snapchat for drawing onti images and captioning them lad, sorry

couldn't find a better app for that purpose

>>7690230
>Sounds like a recipe for shock waves.
>>7690330
i'd advise you to take a look at the NASA paper on Hyperloop, it's greatly informative on what you've mentioned
https://mdao.grc.nasa.gov/publications/AIAA-2015-1587.pdf

Basically NASA limits the Hyperloop to 0.65 Mach max speed while doubling the tube diameter to mitigate the shock waves. Although the feasability of that is up in the air, while the travel time for a distance of 350 miles is only affected by 5 minutes.

I've noted what you've suggested about the rarified vapor, but at this stage it's really up to SpaceX as they're providing the tube we'll be competing in. But in the future that will be in the back of my head

i'd also

>> No.7690780
File: 24 KB, 480x360, I-See-What-You-Did-There-Cat.jpg [View same] [iqdb] [saucenao] [google]
7690780

>>7690403
pic related
>>7690508
>got decent experience as a draftsman and similiar.
get in here! write an email asap anon!

>> No.7690783

>>7690773
>i'd also
nah i wouldn't

>> No.7690957

Good to see, that you have moved forward with this project. I remember when you were recruiting at /diy/.

>> No.7690988

>>7688221
Is there any need for someone to do some CS type stuff?

>> No.7690996

What is it that needs to be done in the navigation area?

>> No.7691798

>>7690957
lel we got chased out of every board including /n/
thanks for the good wishes tho

>>7690988
see
>>7688267
>>7688521

>>7688693
>>7688718
>>7688724

>> No.7691801
File: 31 KB, 510x599, navigation aids.png [View same] [iqdb] [saucenao] [google]
7691801

>>7690996
>What is it that needs to be done in the navigation area?
to quote:
4. Which sensors, if any, should be incorporated into the tube to aid navigation? How should the pod maintain accurate navigation knowledge within the tube?

7 NAVIGATION AIDS
Every 100 feet, a 2-inch wide reflective circumferential stripe will be applied to the inner circumference of the tube. The stripes will be located on the upper 180° of the tube (“9 PM to 3 PM”). The stripe material will consist of Reflective Tape in Fluorescent Red-Orange Color (P/N 75050060534).
At 1,000 feet from the end of the tube, the upper 180° of the tube will be split into two 90° sections. The right side of the tube will continue to use the same Fluorescent Red-Orange tape. The left side of the tube will use Reflective Fluorescent Lime-Yellow tape (P/N 75050060518) for the remainder of the tube. The pattern on both sides of the tube will be the same, color will be the only difference.
At 1,000 feet, a pattern of twenty 2-inch wide stripes separated by 2-inch “blank sections” of the underlying steel tube will be applied as a “1,000 feet left” marker for the Pods. The entire installation is thus 78 inches long.
Similarly, at 500 feet from the end of the tube, a pattern of ten 2-inch wide stripes separated by 2-inch “blank sections” of the underlying steel tube will be applied as a “500 feet left” marker for the Pods. The entire installation is thus 38 inches long.
The entire interior of tube will be illuminated throughout at standard room levels using standard “white” floodlighting from directly above the track. Based on Design Weekend feedback, it is possible that this is changed to narrow-band illumination. Soon after Design Weekend, full lighting specifications (and reflectivity data for the steel) will be released.
See pic related for depiction of optical markings.

Basically detecting markings with an LED photodiode and microcontroller and adjusting Pod speed accordingly.

>> No.7691823

Can someone tell me how the fuck im going to put being a participant of an online loli rape imageboard's hyperloop team in a spaceX competition on my resume?

Please?

>> No.7691837

I'm 2 months into my physics undergraduate program... how can I help?

>> No.7691840

>>7688221
I'd love to get involved, but I'm a first semester MechE at Berkeley. I'll email you if you're interested in my assistance.

>> No.7691858

>>7688416
What the fuck are you doing outside /fit/?

>> No.7691866

>>7691823
In the first place you're not, you're going to put the competition, details of what your duties were and maybe the team name at most.

Secondly almost everyone in academia and tech industry is aware of what /sci/ actually is and it's not nearly as controversial as you want to believe it is. Nobody cares.

>> No.7691867

>>7691866
>maybe the team name at most.
>team name is loli rapers

>> No.7691879

>>7690773
>https://mdao.grc.nasa.gov/publications/AIAA-2015-1587.pdf
Good shit. Looks like a worthwhile read.

>Basically NASA limits the Hyperloop to 0.65 Mach max speed while doubling the tube diameter to mitigate the shock waves.
I think you misread it. They aren't limiting the pod itself to M0.65; just the diffused flow at the compressor face. The flow before the diffuser (and thus the speed of the pod) can be faster than that, but of course the nature of a subsonic diffuser means that the cross section of the compressor must then be larger than the inlet itself (thus either reducing the bypass gap between the pod and the tube, or reducing the percentage of air captured and compressed by the pod's turbomachinery - neither is good). They have it all parametrized out and seem to have settled on an arrangement which achieves M0.82 with a diffused inlet in a 4 meter tube.

But while looking at this, I think I may have come up with an idea which allows the same benefits without increasing the tube diameter. It would seem to me that the compressor-to-tube ratio is itself quite burdensome, but perhaps if you do it one bite at a time - that is, have a handful of smaller inlets and compressors lain out in tandem - you could overcome this issue. Does that make any sense? Maybe I can put pen to paper tomorrow and straighten it out if I'm not clear enough.

>but at this stage it's really up to SpaceX as they're providing the tube we'll be competing in.
I see... all the more reason to try and make NASA's changes work in the original 2.2m tube.

>>7691798
>chased out of /n/
Really? Did you get reported or just a bit of negative feedback?

>> No.7692809

>>7691823
>>7691837
>>7691840
tough break guys, need some experience on board. thanks for your interest though

>>7691866
>Secondly almost everyone in academia and tech industry is aware of what /sci/ actually is
really? i doubt they know about 4chan, let alone /sci/

>>7691879
>I think you misread it. They aren't limiting the pod itself to M0.65; just the diffused flow at the compressor face
You're right, I need to reread that paper. I do so much reading it all gets blurry after a while.

>But while looking at this, I think I may have come up with an idea which allows the same benefits without increasing the tube diameter. It would seem to me that the compressor-to-tube ratio is itself quite burdensome, but perhaps if you do it one bite at a time - that is, have a handful of smaller inlets and compressors lain out in tandem - you could overcome this issue. Does that make any sense? Maybe I can put pen to paper tomorrow and straighten it out if I'm not clear enough.

I kinda get it, but compressors are not my field to be honest. If you could write it in length, that would be great as I can take it to the guys who are in charge of this.

>I see... all the more reason to try and make NASA's changes work in the original 2.2m tube.
I'm all ears, willing to hear any good advise

>Really? Did you get reported or just a bit of negative feedback?
nah, they straight shat on our thread.
>pipedream
>hypeloop
>hipstertube

>> No.7692813

>>7692809
>advise
advice*

>> No.7692857

Mechanical reliability engineer with compressor turbine experience. What stuff needs to be done for the fan/compressor (sizing/selection/usage)? I may be able to contribute from an engineering/design side.

>> No.7692865

Need a meme researcher?

>> No.7692952

>>7692857
do you mind sending an email to
>possessedmanager@gmail.com
I'd like to get you in touch with our mech e and thermo members for specifics
>>7692865
have you brought the dank reviews?

>> No.7693088

>>7692952
I sent you mail (>>7690508)

>> No.7693449
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7693449

>>7692809
>I kinda get it, but compressors are not my field to be honest.
Well I'm kinda not really worrying too much about the compressor itself; just the overall flow situation through and around the capsule (considering that any flow passing through the capsule to the compressor(s) must be diffused).
>If you could write it in length, that would be great as I can take it to the guys who are in charge of this.
I finally got some time, I'll get on it now. I'll work out a feasible example, try to crank out a comparitive illustration and get back to you.

>> No.7693475

>>7688248
wouldn't sitting inside a pod with sonic air flow bypassing it be deafeningly loud in practice?

>> No.7693515

Still looking for software engineers/CS people? I'm currently employed, so obviously I can't give a full time effort, but work is going to be very hands off for the rest of the year due to it being around Christmas, so I should have plenty of energy to devote to this.

I'm definitely not a networking wiz or anything, but I know my way around tcp/ip and Java/C/C++ depending on what exactly you need.

What about the
>navigation
part? What is involved in that?

>> No.7693569

>>7693515
>>navigation
>part? What is involved in that?
Disregard, I am a faggot who did not read the thread all the way.

I have some experience from back in college working with visual technology to control a robot, though to be honest, my total experience is just two semesters on that project.

>> No.7693601

>>7688221
Are you guys actual engineering professionals?

>> No.7693690
File: 1.79 MB, 2448x3264, FullSizeRender 3.jpg [View same] [iqdb] [saucenao] [google]
7693690

>>7693449
>>7692809
Here... apologies for the chicken-scratch napkin sketches, but I really can't be assed to do better right now.

SO, what I have worked out at top is essentially a simplified case of the original proposal. For simplicity's sake (since I'm a lazy motherfucker) I've neglected the "blockage factor" they include in the NASA report, but other than that it's pretty much the same as what they have in the smaller, 2.2m tube. Also for simplicity's sake, I have used a single diffuser area ratio of 1.36 throughout - sufficient to slow inlet air at mach 1 to compressor-friendly 0.65.

Now, the principal constraint is that bypass air cannot exceed Mach 1. Furthermore, since we need to diffuse inlet air to M0.65, the air which is NOT ingested into the inlet (passing through A1) must be accelerated in order to pass through the smaller A-bypass. This means the mach number at A1 (and thus, the speed of the pod itself) must be lower than mach 1, corresponding to this area ratio. Even in this ideal case with a BF = 1, the maximum mach achievable for a pod/tube combo of the original dimensions, with a diffuser and single compressor is M0.741.

However, as shown below, I realized that it's possible for the pod to swallow a greater fraction of the air overall if it takes it one bite at a time. This is because, by spreading multiple inlets and compressors out in tandem, each compressor can get it's bite "out of the way" by compressing the air before the subsequent inlet must take it's bite (or at least before the diffuser hits it's widest point, as in my example). In this way, the only inlet and diffuser causing critical constriction of the surrounding flow is the first one, with the remaining diffusers effectively "hiding" their cross-sectional area behind the one in front of it. In effect, we've replicated the effect of having a greater tube:pod ratio without actually shrinking the pod or widening the tube itself.

[cont]

>> No.7693724

>>7693690
Note: I failed to show it explicitly, but in the lower illustration, the external mach number from A2 onward can be as high as mach 1, just like in the bypass. But anyways...

The performance of this layout holds potential for further improvement, as well. Although my example has three inlets and diffusers of equal size, the size of the first inlet and diffuser in proportion to the tube itself is the driving factor. By dividing the flow through an even greater number of equal-sized inlets, or better yet, by the same number of inlets but each one progressively smaller than the one behind it (say, double the compressor and inlet areas for each stage), the same effect could be taken to an even further degree (MUCH further, I reckon).

Also, although my illustration suggests a staggered parallel configuration with compressors all on different shafts, it is entirely possible to rearrange this concept into a tandem-axial or concentric layout with all three compressors on the same shaft if desired.

I'll stick around to answer questions for now, but I don't think I'm going to take this analysis any further (if I do I'll examine the case with progressively-sized inlets as described above). I hope this is of some help to your project.

>> No.7693752

>>7688221
>>7689961
>@ITUHyperloopSci
>The only #Hyperloop team representing Turkey at SpaceX Design Weekend.
>İTÜ Hyperloop Tasarım Ekibi SpaceX Tasarım Haftasonu'nda Türkiye'yi temsil edecek!

Why the hell should I put in my time and effort to represent fucking Turkey?

>> No.7693949

>>7693752
Don't be a dick

>> No.7693956 [DELETED] 

>>7693752
>>>/pol/

>> No.7693961
File: 25 KB, 300x301, nye.jpg [View same] [iqdb] [saucenao] [google]
7693961

>>7693752
There is a simple explanation for that:

The project started off /sci/, we had 20 members at one point, but it got stuck as every project does on 4chan, people lost their motivation and started leaving one by one.

Me and three other members (they are not Turks) decided to keep going at it, I've pulled strings at my University and now we are a team again, but with 75% of team members from ITU, admittedly non-channers, along with mandatory faculty and external advisors. SpaceX prioritizes students teams so we asked the non-ITU members and they gave the green light to apply as ITU team.

You might not be aware that this project needs serious sponsorhip, excluding travel costs, around $100k. For that money to be raised, we need to raise awareness to our cause. No one's going to sponsor a 4chan team, but we have something going here. In 2 days, from zero we've collected 200 followers - no bots, and both yesterday and today we're having media interviews.

I could have simply pulled the /sci/ handle from the team name and moved on with ITU but I am willing to give back to the community something to cheer and be engaged about for helping me start all this.

But if you're still gonna keep at >hurr durr Turnkey, i can only say >>>/pol/

>> No.7693964

>>7693449
>>7693690
>>7693724

This is awesome, thanks so much anon. Taking this to the compressor guys right away

>> No.7693968
File: 16 KB, 577x193, hyperloop.png [View same] [iqdb] [saucenao] [google]
7693968

>>7693475
there's a sound/fire wall, see pic
>>7693515
>>7693569
yeah you saw that, hit me up at
>possessedmanager@gmail.com
any experience with navigation is needed
>>7693601
students

>> No.7694061

>>7693949
This isn't about being a dick it's a legitimate concern.
If this random ass university in Istanbul is going to get the credit for whatever contribution I make then why would I participate?

This isn't a /sci/ team it's some random uni club wanting to get free help.

>> No.7694071

>>7689961
>>7693961
>The only #Hyperloop team representing Turkey at SpaceX Design Weekend.
>75% of team members from ITU
>@ITUHyperloopSci
> apply as ITU team
I see no affiliation with 4chan or /sci/ at all in your twitter account or any of the other information you've presented, and from your attitude
>No one's going to sponsor a 4chan team
it's evident that won't be changing.

You may have tried to start this off as a /sci/ project but it certainly isn't now and has no business being on this board.

>> No.7694077

>>7694061
>>7694071
thanks for your input

>> No.7694082
File: 54 KB, 571x570, cool_story_bro.jpg [View same] [iqdb] [saucenao] [google]
7694082

>>7694071
to add
>@ITUHyperloopSci
>I see no affiliation with 4chan or /sci/

>HyperloopSci
>no affiliation with /sci/

>> No.7694091
File: 29 KB, 623x248, fag.png [View same] [iqdb] [saucenao] [google]
7694091

>>7694077
>>7694082
>damage control
So, incredibly evident that this is the /sci/ team.
I'm sure those other anons were most definitely not strong armed into agreeing to applying to your university.
If this does well you'll gladly boast about the teams 4chan basis and make sure to credit /sci/ in all media publications.
This thread is not cheap advertising to crowdsource the difficult parts of your project.


Don't any of you faggots fall for this scam.

>> No.7694095
File: 90 KB, 800x568, referee-smiles-girl-beats-boy-wrestling.jpg [View same] [iqdb] [saucenao] [google]
7694095

>>7694091
>Sci writes in capitals in the Team Name
>this is a scam

I will boast about 4chan when we secure our sponsors, because a 4chan vs Reddit showdown only brings more publicity to the project. At this point it is only detrimental, but I don't expect you to understand.

You are welcome to leave the thread if you think this is a scam though. I'm done replying to you

>> No.7694107

>>7694095
>Sci writes in capitals in the Team Name
That is so incredibly ambiguous. Do you know how many names have SCI in them? That has no real associative power with this board. Not to mention the damn thing starts prominently with ITU.
Are you wanting us to take this seriously?
Sticking sci in the name is generic as you can get m8.

>I will boast about 4chan when we secure our sponsors, because a 4chan vs Reddit showdown only brings more publicity to the project.
That's such a weak promise that you'll definitely cave on. If you can't see how it's troubling that you're only going to mention 4chan when it's too your benefit then you're being willfully ignorant.

I have seen way way too many 4chan projects fail and what you're doing is generally the pattern. The moment a core group of people who know eachother take over they always end up removing all association with this site as soon as they possibly can.
If you want help from 4chan you have to take the stinky shit covered futa dick with rest of the package. You can't pick and choose the teams' assocation with this site and expect us to respect that.

>You are welcome to leave the thread if you think this is a scam though. I'm done replying to you
'no', I don't want to see anons taken advantage of.

>> No.7694395
File: 37 KB, 555x448, 4001_original_1306977556327.jpg [View same] [iqdb] [saucenao] [google]
7694395

>>7693752
>>7694061
>>7694071
>>7694091
>>7694107

>> No.7694867

>>7694107
Fuck you.

>9/10 got me to reply.

>> No.7694903

>Aerospace engineer with nothing to do
>see this thread
>HYPE
>the "/sci/" team is actually some Turkish university
Welp

>> No.7694993

>>7693752
>>7694061
>>7694071
>>7694082
>>7694091
>>7694107
To be fair this project wouldn't exist without the massive support we get from ITU and OP organizing it. There was just no way we could justify not entering as a university team under ITU at the point that we had to submit since the majority of our members and faculty advisers were from there. We needed aerospace postgrads since we unfortunately didn't get any from /sci/ and we did have a few from all over the world who quit eventually for various reasons (mostly because working with a team without regular irl meetings is alien to them), the ITU team stuck and quickly grew eventually becoming the majority. It's just how the team evolved it's not how anyone intended.

>I have seen way way too many 4chan projects fail and what you're doing is generally the pattern. The moment a core group of people who know eachother take over they always end up removing all association with this site as soon as they possibly can.
A few months ago this would've been spot on, but it's not what's happening now. What essentially happened is a minority of boisterous people (not Possessed btw, he never wanted to be in charge of the project in the first place, but was eventually forced to since after our experienced engineering manager quit no one else stepped up) started dominating the project chat mostly posting on sporadically different things, making unusable "contributions" with half treating it like social media in passive aggressive conflict with more 4chan/sci/ core people, the former obviously wanted to dissociate from 4chan. I believe that's the point where the majority of our more qualified 4chan members left, thought it's hard to say for certain, maybe they never cared.

And of course the faggots who wanted dissociation from 4chan quit on the project barely a few weeks in because guess which members of the group were least qualified and poised to make contributions?

>> No.7694997

>>7694993

So morale was zero since both the Anons and -well, others left. Pretty much only OP was driving the project, but we weren't getting any more recruits from 4chan and eventually we got the first ITU members and the team mainly grew on that end which has had it's own set of problems.

Personally I still consider this a /sci/ project and I want to see it through so I'm still working on it despite my own low morale. I still fantasize about a more explicitly open source /sci/ core project working with random bros from here, but unless we get a huge surge of support that would obviously be difficult.

As for the rest of your comments, we have all the "difficult" parts covered and we can get everything done on our own. We could use both specialists and people to ease the workload in certain areas, we all have contacts at our own universities and can get specialist advice, but mean bringing on more non-/sci/ people. Most of the people replying ITT are skills that we do not need. Possessed is asking them to email them precisely because he wants more people from /sci/ associated with the team, not because he's trying to "trick" you into doing work for us, based on experience the majority will lurk the chat and not contribute more than discussion, which is fine with us, we aren't expecting anyone to work. We are all working trying to make it fun. If you're worried about credit I can personally assure you that you will get precisely as much as you want/need for your career (though that would of course fundamentally require you to deanonymize yourself to us at some point), everything you contribute is extensively logged and archived, no one can take work you've done away from you.


The important lesson to take for any future /sci/ and 4chan projects is to keep as much of the discussion in 4chan threads itself. Not only does it help recruit more members the replace the majority who quit, but it also forces the retention of 4chan culture.

>> No.7695001

>>7694903
Read my posts >>7694903 >>7694993.

Where the fuck where you 4 months ago anon, you could've saved the project ;_;

>> No.7695019

>>7694993
>>7694997
>>7695001
So, it's no longer a 4chan project, got it. Kinda sucks, especially since there's absolutely no mention of 4chan or /sci/ involved.

>> No.7695035

/sci/ getting shit done, thanks man. I'm glad for you guys.
Too bad, I'm already attending in two workshops and working on a contest. I monitored all the threads, this is a slow board but I'm sure all of us support you guys.
I wish I could help but I know little to nothing in your endeavour.

>> No.7695184

>>7695035
Thanks bro, glad to be appreciated. Hopefully we won't let you guys down

>>7694993
>>7694997
as my fellow teammate well explained, we tried every single possible way to salvage the team. i've even sent an email to the original team members after the preliminary submission acceptance, to see if the newfound success could get them motivated. Only one was bothered to reply, asking to be excused due to his heavy workload elsewhere.

>> No.7695200

For what do you need an aerospace engineer. exactly. wastd right now cant really follow the thread

>> No.7695233

to further clarify before the troll strikes again:

Why do you guys think a malaysian knitting forum with 2 million unique posters per month is having trouble getting advertisements?

4chan has a bad reputation. this is no secret, everyone knows this. We are not trying to hide our connection, there were ones as my teammate said who wanted nothing to do with 4chan, but we already are giving a nod to /sci/ in our names.

Any attempt at bringing 4chan up will be met with skepticism because this site is known for trolling, racist humor, fappening and memes. At this point I can't force a team that does not browse 4chan in majority to get under its collective identity. If association with 4chan needs to be done, I will do it personally and keep the rest of the team out of this. I have no right for that.

We are not shying from the challenge of having 4chan accepted in the competition. But for that, we need to accomplish something ourselves, for instance advancing to the construction stage with our sponsors set - sponsors who wouldn't have a reason to shy away from us, thinking whether their reputation would be stained from a 4chan connection. Only then we can prove to people, that 4chan is something beyond the trolling and snarky comments, that something constructive comes out of there when conditions are set. However, we are currently trying to get a better grasp onto the competition, trying to get everything clicking. The time is not right for dealing with that yet.

>> No.7695245

>>7695200
We have set up a team that will do the CFD simulations, but there are more detailed design problems such as the interior flow channels, or CFD simulations of fans and compressors. Basically someone with experience to provide guidance next to our PhD student Aero lead would be nice.

>> No.7695269

>>7688259
>>7688248
>No punctuation
>No capitalization
I wouldn't lend you a single buck if my life depended on it.

>> No.7695290

>>7695269
Seems it isn't just me.

I know it's not the most solid heuristic, but I do judge people by their composition pretty hard. Not capitalizing "I" (or contractions thereof), not using punctuation, not capitalizing sentences, incorrect your / you're, there [...]... It says either stupid or lazy. This is what it communicates.

Can't shake that underlying perception either. Probably because I don't truly want to. Capitalize your shit, fucker. It's not about perfection or aligning with some seemingly arbitrary rules of syntax, it's just about being good enough.

>> No.7695308
File: 23 KB, 398x500, Thumbs_up_kid_big.jpg [View same] [iqdb] [saucenao] [google]
7695308

>>7695269
>>7695290
How many minutes did it take you to write those posts?

>> No.7695386

>>7695308
Probably around a minute (mine was the second one). I'm pretty trashed in general. Like, I'm not tired. I'm not intoxicated. I'm not bored. I'm just trashed and kind of broken.

Figuring out how to put words together took longer than the topic actually deserved. Fucks never improve themselves to my standards. But I think if there's one single thing I hate, it's not capitalizing I. It just looks so goddamn stupid. So lazy. So fucking sloppy stupid.

i did blah blah
i'm blah blah
Yes good sir, i most certainly agree. I believe that i'll bla blah blah.
i blahb blafgjlksgkds~~!!~

I have the problem. I know this. I have many problems. But it doesn't make that "writing style" less stupid and lazy looking.

>> No.7695500

>>7693449
Just wondering, what causes the air to move that fast? is it the relative displacement of the pod in relation with it?

>> No.7695623

>All this anger over credit and publicity on an anonymous Egyptian tapestry board
Yeesh. Does it REALLY matter?
>>7695500
>what causes the air to move that fast?
Well firstly, keep in mind that these speeds are from the perspective of the pod itself. You could just as well look at it from the point of view of the tube, in which case the air is still and then momentarily moves around the pod in the opposite direction as the pod passes by. When you add the speed of the pod in one direction (say, M0.8) to the speed of the air rushing around it in the opposite direction (say, M0.2), the result is local transonic flow.
>is it the relative displacement of the pod in relation with it?
Yes, exactly. Another way of looking at it is as if the tube is a cylinder and the pod is a loose-fitting piston with gaps around it. As the "piston" itself moves through the "cylinder," the air in front of the "piston" rushes through the gaps to get behind the "piston."

>> No.7695642

>>7688466
This. What the honest fuck; WHY ARE YOU WORKING FOR FREE?

STEM people are fucking baffling sometimes. It's one thing to be committed to a subject. It's entirely another to do it produce value for people when you aren't getting paid.

>> No.7695764

>>7695642
The magic of "enjoying things."

>> No.7695936

>>7695233
>call out bullshit
>troll
Nah m8

What the hell do you think is going to happen once you somehow manage to get sponsors? You think they'll just suddenly accept you associating with this site out of nowhere? What you're trying to do is essentially fraud. The time will never be fucking right. You can't drop a bomb like that on your investors they have a right to know what they're getting into upfront.

>>7694993
>>7694997
I'm beginning to understand what happened better.
The problem I have isn't the assocation with ITU or their patronage it's that there is absolutely nothing linking it to /sci/ other than this thread. What more I have not seen ongoing threads or recruitment efforts on this board and if they've been done they've been minimal.
You all might very well have good intentions but what your doing comes across as scammy when this comes out of nowhere like this.

However, at the core of it getting credit is concerning but not on the personal scale. Rather I would want my contributions to be representing /sci/ and not ITU.

>
The important lesson to take for any future /sci/ and 4chan projects is to keep as much of the discussion in 4chan threads itself.
Nailed it.

>>7695184
> we tried every single possible way to salvage the team
Except making threads apparently. Ridiculously high turnover should have been expected and accounted for in the project plan. It's the nature of anonymous projects. You have to mitigate this by constantly recruiting new people but have them focused on smaller project chunks that won't fuck over the entire project if they flake.

> At this point I can't force a team that does not browse 4chan in majority to get under its collective identity.
Listen to what your saying here. The team has changed it's a different group of people now you guys have developed your own culture and values. Why involve /sci/ at all at this point?

>> No.7695949

>>7695642
>>7688466
just kill yourselves

>> No.7696171

>>7695936
>What you're trying to do is essentially fraud
A fraud involves getting something and not giving in return. So far I have given 3 /sci/ members an opportunity to present to SpaceX. I didn't want to say this, but read my teammate's post, I've been carrying the team on my shoulders. I could have simply fucked off, instead I came back every time trying to get the community involved in this. I have been contributing to /sci/ a lot more than you imagine.
And what exactly am I demanding from /sci/ that makes me a fraud? Representation of them? And who are you to think you are representing the rest of the board? As far as I am concerned you are being destructive, you are not entitled to think your opinion represents anyone else, and you are shitting up the thread thinking how we are doing /sci/ harm, while we are giving them a community project to brainstorm, argue and spend their time on at the very least. I've said troll because your initial replies made me think so, now I think otherwise.

For the investors part, it won't happen if I don't bring up 4chan vs Reddit and convince them of the publicity it will bring. To be able to do that, I have to have my worth proven to them already so they would think I know what I am doing.

>Except making threads apparently.
Check the archives.

>Listen to what your saying here. The team has changed it's a different group of people now you guys have developed your own culture and values. Why involve /sci/ at all at this point?
Because I'm trying dammit! I'm coming back here every single time hoping to get new members. It didn't work until now, which lead to the breaking down of our initial /sci/ team. Now that we are getting a glimpse of success anons are getting interested again and we may still turn the team around.

>> No.7696178

>>7695386
I get you anon. I promise I'll be more careful with my writing from now on.

>> No.7696223

>>7695269
>>7695290
What does that have to do with building hyperloops?

>> No.7696224

>>7695936
Think logically for a second. If I was a fraud, I would cut any ties that would lead /sci/ to my IRL identity. I would think about how to get as much as possible without revealing as little in return. There is no reasoning you can give for sharing my Twitter handle, assuming I'm a fraud.
An anon asked for it, and I shared. That's it.

Before posting the Twitter handle, I actually thought about someone like you would bring up the ITU subject, but I didn't imagine it would drag for so long.

>> No.7696225

>>7695290
The only thing it communicates is a lack of standards when it comes to posting on /sci//

>> No.7697400

This makes me happy, gj and gl OP, this project is really cool, regardless of where it came from or what's happened, I hope things go well

>> No.7697666
File: 42 KB, 650x612, 14309-go-to-the-winchester-have-a-nice-cold-pint-and-wait-for-all-of-this-to.jpg [View same] [iqdb] [saucenao] [google]
7697666

>>7697400
Thanks for the good wishes anon