Hobby space flight

[Anonymous No.10388029]

How would you use old technology today to achieve getting past the Karman line (62miles) ?

[Anonymous No.10388244]

>>10388029
A combination air breathing solid fuel ramjet/ hybrid rocket. It would use a paraffin wax (AKA candle wax) fuel grain and use ambient air as the oxidizer while in the atmosphere, and then switch to LOX once in the vacuum of space. The sublimating paraffin would absorb the heat and keep the vehicle from melting.

[Anonymous No.10388254]

>>10388029
Literally anyone can do space stuff with balloons. Couldn't be bother to look up if they can get past 62miles though.

[Anonymous No.10388288]

>>10388254
The best unmanned balloons can't go much beyond the stratosphere, the air simply gets too thin.

[Anonymous No.10388295]

>>10388244
Hybrid
As a valve to switch from hydrogen to liquid oxygen
One jet engine with two fuel systems

[Anonymous No.10388311]

>>10388254
Maybe something with a kick to it.
Earth's gravity you want to be able to get out of it

[Anonymous No.10388318]

>>10388029

[Anonymous No.10388321]

>>10388318
What is that ?

[Anonymous No.10388325]

>>10388029
A big tube filled with explosives, with a camera, and altimeter to prove it got that high. CSXT, a group of rocketry amateurs, has launched rockets above the karman line twice.(~116 km) So in short, sounding rockets. Getting into orbit or getting people into orbit is much harder. Personally, I want to see a gun or cannon launched rocket. And holy fuck someone's trying to do that. With a scram cannon.
techcrunch.com/2019/02/13/hypersciences-hypersonic-test-crowfunding/

[Anonymous No.10388386]

>>10388325
What about
Slush hydrogen
a combination of liquid hydrogen and solid hydrogen at the triple point with a lower temperature and a higher density than liquid hydrogen. It is formed by bringing liquid hydrogen down to nearly the melting point (14.01 K or −259.14 °C) that increases density by 16–20% as compared to liquid hydrogen.[1] It is proposed as a rocket fuel in place of liquid hydrogen in order to improve tankage and thus reduce the dry weight of the vehicle.[2]

[Anonymous No.10388396]

>>10388386
that sounds hard and I thought OP was asking about doing this at the amateur level.

[Anonymous No.10388410]

>>10388396
Yes
Amateur level
The orient express by Ronald Reagan

[Anonymous No.10388413]

>>10388396
The parts a basic now a days
It's the permit and the sonic boom law
I'm not trying to do Mach 25
Just enough to get to 62 miles

[Anonymous No.10388417]

We're not alone, and we're the bottom of the food chain

[Anonymous No.10388422]

>>10388029
Only point would be to sabotage the giant piece of space junk known as the international space station.
The biggest waste of money in space history, used for PR and not scientific advancement.

You want to know why we haven't went to mars or the moon?
Thank the International Space Station. We've spent more money to date on it than all other space operations combined. 150 billion USD, and that's just the initial cost. If we count the 10 billion that goes to it year after year, we've spent some 200 additional billion to date .

It's not even a real space station. It's a piece of shit that's holding science back.

[Anonymous No.10388430]

Now this, this would have been a real space station. Back when men had vision. Not "well, we don't have much money to put toward this even though technology has advanced even further so let's come up with the worst compromise imaginable and kill off any interest in space" ISS.

[Anonymous No.10388483]

>>10388029
>old technology
here

[Anonymous No.10388524]

>>10388430
ISS went the route of a Lego kit

[Anonymous No.10389839]

>>10388422
What about future space stations in other planets orbit.
There is a log of good information and advancements
Many countries contribute to the ISS

Subject is quick cheep space flight in a safe way

[Anonymous No.10389840]

>>10388483
Not amateur
Build by pros

[Anonymous No.10389843]

Home made sugar rocket. I think 100kg should do it even with subpar propellant mix.

[Anonymous No.10389854]

>>10388422
forget about it. Just do all you can to prevent the DSG and stop the SLS. Also you should be angry about CASIS, which sells experiment space on the ISS to private companies while US tax payers pay the launch cost. You probably helped a big multinational conglomerate make shampoo that last slightly longer on shelves
>>10389843
diminishing gains. Just use Ammonium perchlorate like the real pros use.
>>10388413
Then a big tube filled with explosives is the best way to go. Be interesting to see if battery powered turbopumps and 3d printed engines could enable amateur liquid fueled rockets.

[Anonymous No.10389939]

>>10389854
I'm researching homemade liquids at the moment, the biggest hurdle so far is finding a safe(ish) oxidiser, I'm considering Liquid Nitrous Oxide but need to find a cheap way a maintain -100C.

[Anonymous No.10389956]

>>10389939
N2O is definitely the "safest" useful oxydizer an amateur can get.

For maintaining cold temperatures, perhaps placing the N2O (with its tank) in a bath of liquid nitrogen? And just chilling it shortly before fueling and launch? I'm still new with cryogenics though, so I may be wrong.

[Anonymous No.10389969]

>>10389956
I want to be able to chill on site rather than needing to fill a dewar, I have been looking at second hand lab freezers but I'm finding -86C (2 deg too hot) much more common than -100C.
I have also been looking at homemade cryo-chillers but that seems like a huge time investment just to start playing with liquid fuels.

[Anonymous No.10389980]

>>10389843
Bees
Bees

[Anonymous No.10389982]

>>10389969
Is the cold temperature an absolute requirement? IIRC it doesn't take much more pressure than atmospheric to liquefy N2O at room temperature. And according to an analysis I did a while ago, you get better performance from room temperature N2O compared to chilled.

[Anonymous No.10389990]

>>10389982
Do you have a N2O phase diagram? I was looking for one earlier but keep getting paywalls. If it's under ~5atm it could be viable for a flight engine and if not I would be willing to go to ~25atm on a stand.

[Anonymous No.10390028]

>>10389990
Attached image was the best I could find.
Source: https://www.sciencedirect.com/science/article/pii/S0021961409001645
The full article is behind a paywall but this graph should give you a good idea of where the different phases are.

At room temperature N2O liquefies at ~50atm. With my math, a pressure fed rocket with this is possible. However it's not getting to the Karman line.

I hope this helps.

[Anonymous No.10390042]

>>10390028
Thanks anon.
50atm is well beyond the point I trust my welds but looking at that diagram it looks like it might only be ~2atm at -70C which can be done cheap and easy with dry ice.

[Anonymous No.10390060]

>>10390042
I'm happy to help! Just always keep safety in mind. Test everything before you put it all together.

[Anonymous No.10390076]

>>10390060
For sure, I have a pressure washer and will be testing everything with water long before letting reactive chemicals near it.
I'm also considering burst disks on just about everything because I would much rather lose some piping and wires to a fire in a pit than have hypersonic metal flying around the place.

[Anonymous No.10390077]

What about hydrogen peroxide as oxidizer? No cryogenics to deal with and its a dense liquid at room temperature.

[Anonymous No.10390080]

>>10390077
I seriously considered it awhile ago but it needs to be high-test to be of much use and at that point it just wants an excuse for thermal runaway. Even an eyelash might start the rapid decomposition party.

[Anonymous No.10390100]

>>10390080
I should add that the party ends with a 600C cloud of oxygen incinerating everything with a flashpoint below 600, like human flesh.

[Anonymous No.10390101]

>>10390077
What >>10390080 said and that you need a license to get anything above the concentrations where it is useful as a rocket propellant (at least in the States).

[Anonymous No.10390164]

>>10388321
Sumatra Space Program

[Anonymous No.10390607]

>>10388321
Literally every 4th of July at my Dad's.
We dont agree on anything except comedy movies and the love of blowing shit up.

[Anonymous No.10390679]

>>10390077
What about
Kerosene and LOX
You have to use it the day of launch

[Anonymous No.10390729]

I wonder why no one at the time thought to build in a different way

[Anonymous No.10390736]

[Anonymous No.10390832]

>>10390080
Turbo pump to pump LOX after the you shut off fuel and switch over
Simple

[Anonymous No.10390886]

>>10388318
Remarkably stable and impressive height.