/sci/ - Science & Math

>>2308232
So I see a traditional Apollo-like capsule design with fuckhuge solar panels and either habitats or reactors on the end of long booms.

Q1: What is the purpose of this craft and how does your design accomplish these goals?
Q2: What is the rotation speed and length (center to habitat/reactor end) of the booms and what "centrifugal" force is achieved?
Q3: What is the method of propulsion for the craft? Its specific impulse, delta v, power requirements, mass of fuel and craft?
Q4: Why are the solar panels so fuckhuge?
Q5: How is excess heat radiated from the craft?

ur a huge faggot

>>2308266
In Q1 please include the number of crew, duration and delta v of the mission.

>>2308260

one and done

>Apollo CSM
>Two huge trusses adding mass penalty
>Two crew modules
>Huge solar panels.

Scia, this is how you do the artificial gravity:

Crew module sitting on top of engine module.

After the burn, a tether is extended between the two, keeping them separate and mass-balanced.

The ship spins, producing artificial gravity. You no longer need huge trusses or anything, just the people dangling at the back of a tether with the engines at the other end.

This has the benefit that the centripetal acceleration and the g-forces during a burn both point in the same direction, reducing the need for rotating frames.

>>2308293
I've always preferred to have a 10m diameter (5m radius) internal drum with counterweight spun to just above lunar gravity at the lowest of 2 floors. That is if you can afford to have a crew section that is 34ft wide.

You provide a nice living arrangement with a down, crew can run the same direction as the wheel spins and can jog at Earth gravity.

>>2308330
Also the advantage of the internal drum is it can be despun quicker than the entire ship and without expending fuel, it doesn't have rotating airtight seals of an external centrifuge and the ship can change attitude at will with only minor gyroscopic influence of the internal drum, which can be negated almost entirely by use of a counterweight.

>>2308293
Im not doing a tether

I need for my crew to always have access to all pressurized parts of the ship

>>2308373

The engines resting at the other end of the tether are not pressurized.

>>2308266
>>2308266
The purpose is to transport humans to moon, mars, ect..

and it uses nuclear thermal propulsion

keep in mind im not done I still need to finish the propulsion systems and add a lunar lander on the front to act as the decent stage

Also the panels are huge because my shit needs a lot of power and they will always be able to see the sun now

>>2308436
Have you thought about upgrading to AutoCAD?
I have neither SketchUp nor AutoCAD installed at the moment, but perhaps using AutoCAD would allow for more detail. Just a thought.

>>2308436
A lot of power to do what? NTRs tend not to need much in the way of external power and when you are in low lunar or Earth orbit, solar panels won't be much use when the Sun is on the other side.

The good thing about NTR is you don't need much in the way of radiators as you can regeneratively cool the engine during burns and you don't need much extra for basic subsystems. Because you're only going to lunar orbit 4 kms out 1.3 kms back home.

>>2308505
I don' have that kinda money

It's looking great, dude. The only thing is I would think you'd want to put the solar panels along the truss for easier support, or repair if necessary.

>>2308554

You know, you could just learn Blender.

>>2308554
Torrents, mate.

>>2308562

NOBODY wants to learn Blender

NOBODY

>>2308562
Iv'e always wondered what that is

is it an asteroid with a solar sail?

and I have skills in sketchup and it works just fine for me

I can just use an external renderer

>>2308592
>is it an asteroid with a solar sail?
Yes.

>>2308579
Also im just used to sketchup

it works for now


so overall do you think im doing a good job

>>2308592

>is it an asteroid with a solar sail?
Yes.

>>2308604
that does not look like an asteroid it looks like a shiny alien thing

>>2308617

GEEZ I'M SORRY I WENT TOO FAR WITH THE SUBSURFACE MODIFIER

Now it looks so smooth it hurts.

>>2308232
>engineer

AWESOME!

Also, you want to move those pitch thrusters just as far forward as they can go, and you need matching ones on the aft of the craft. Also, I'm not sure what the dimensions are supposed to be. Sketchup says the habitation modules are only 1m in diameter, but I assume that's not right. The Apollo service module was 4m in diameter, ISS modules are 4.4m in diameter. I assume you want something at least that roomy.

>>2308619
Yeah it does


Why don't you try to make a spacecraft like mine? try to make a realistic interplanetary spacecraft

>>2308607
Why don't you use a real engineering program; like i dunno, inventor?

>>2308644
Yeah I uploaded that before I re sized that

now the apollo module is 4 meters in diameter

>>2308659

IPV Yuri Gagarin, for my novel. Still in the making.

>>2308666
because im fucking poor

I have like 20 bucks

>>2308232
OP the tl;dr of it is the engineering of the spacecraft is not designed so much on looks but on function. Your solar panels are no bigger than they need to be and no smaller. Your mass is declared, engine performance and fuel requirements calculated. You build a deckplan and know what goes where. etc etc

Project rho can be helpful in understanding your needs and building a spacecraft like an engineer. However, project rho is not complete, exhaustive or fully correct, but for somebody trying to get some realistic numbers its a step in the right direction.

>>2308675
looks interstellar to me

>>2308675
Bussard ramjet?

>>2308677
Bro, I'm a poor highschool student. Just pirate the damn thing. And don't give me any of that "but my internet is too sloooooww" bullshit either. My max download speed is 150 kb/s and I downloaded it.

>>2308686

It's pretty heavy duty stuff: Transport of 300 engineers and scientists to take part in a... Deep Space Propulsion conference.

On Titan. In a hotel.

Built by them.

Ships supplied by the Open Space Movement, because only they would approve such a thing ;)

>>2308670
So what's your service tube, 2m? You could probably scale that down to 1m to save mass.

>>2308699

Project Valkyrie

>>2308679
I did not build I based on looks

>>2308675
I think that would be tricky. You'd have to maneuver just right, you risk snapping your tether.

>>2308703
Ok then try to make a 21'st century spacecraft

>>2308723

The tether is a Carbon Nanotube wire.

It's fucking diamond rope man. And there are thrusters on each torus so the manoeuvring is properly balanced.

>>2308732

It is.

>>2308516
He's flying it to mars. He needs lots of power so the astronauts can play Halo for 1.5 years en route. (or whatever it is the kids are playing nowadays) Out at mars you need bigger panels than you do at earth.

>>2308738

>>2308760

>>2308677
then use blender and stop depending on proprietary software and formats

>>2308764
I can use a file converter and use an external renderer

>>2308763
not really but I don't think we will be able to build that this century

>>2308791

Molecular nanotechnology, etc.

>>2308764
That don't look like no spaceship!

Why artificial gravity on a not-space-station? Just get some comfy chairs, some sleep inducing drug, and put the humans on board to sleep. Much lower metabolism and oxygen consumption rates, and just wake one or a few of them up every 12-24 hours in order to check system operations, eat a meal, perform some hygenic care, and excercise themselves back into tiredness and keep their muscles from atrophy. It's why we sleep, so that we stay alive for periods of time at our most efficient state.

>>2308764
Blender is modeling for the purpose of rendering it.
SketchUp is modeling for the purpose of actually designing/engineering something.

>>2308812
>Just get some comfy chairs
I don't think you understand how zero-g works.

>>2308812
Space travel takes a long time.

>>2308820
Relatively, so does staying awake all night. Sleeping makes you go unconcious and you've no recollection of the hours that have passed when you've woken up. But you may say that this method would take a heavy toll on the humans, and it might if they don't adhere to their schedule well if it's going to be like a month's journey to mars. But if you're talking about a week or less to the Moon, just sleep it off is what I suggest.

>>2308819
I don't think you understand how uncomfortable it is to be strapped into a not-so-comfy chair for days at a time.

>>2308870
The flight to mars is about a year, genius, and you don't use fucking chairs in zero g, and your bones will wither away to nothing if you sleep for a year in zero-g.

BEHOLD
http://sketchup.engineeringtoolbox.com/

>>2308891
Basically this.

Rendered without textures

>>2308905
I love you so much right now

>>2308924
Lower gamma better view

for a large craft like that it would not be very maneuverable and the spinning to simulate gravity produces real control problems
the engine and fuel capacity for a craft of that size even with ntr's or vasimir's it wouldn't have enough fuel to make it from low earth orbit to the moon in which case the artificial gravity and huge solar panels are unnecessary

>>2308891
Well aren't we butthurt over being wrong. All vehicles to enter space meant for human habitation have had a fastening system of some kind; pads, small bed, even chairs. Often humans tend to sleep in said contraptions so as to avoid floating around and hitting things. Besides, it was probably the last thing to take seriously in my original proposal, you pseudo-smartass.
Yes, with current propulsion technology, year to Mars. It's fucking rediculous, and by no means would I propose any solution to keep humans alive for an entire year onboard any spacecraft whatsoever. So of course my proposal only works within a maximum of a few months, because any longer would require massive stores of food, water, and general supplies.
But there could have so much excellent debate about just putting people into slumber for spce travel, but no. You just had to go be a chair-addled fool.

>>2308964
Im not done with the propulsion systems

I plan on adding a lot more tomorrow

also a lunar module

>>2308968
lolno, there are no chairs in any spacecraft that operates completely in zero-g environments. You sleep in basically a sleeping bag attached to a wall that keeps you from floating around while you're asleep. When you're awake and working, you're just floating unrestrained.

>>2309036
Then don't mind me while I sleep in comfy sleeping bags on my efficient and restful trip to the moon.
>I will never go to the moon
>moroseamphibian.jpg