Homebuilt space craft !

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takatiki
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Homebuilt space craft !

#1 Post by takatiki » Sun May 07, 2017 6:18 am

I am close to being "Farmer Astronaut" !

I think a R/C model in 1/18 scale is doable of this to show that a affordable space exploration is doable.

What do you think ? :rolleyes:
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Re: Homebuilt space craft !

#2 Post by lownslow » Sun May 07, 2017 6:44 pm

Edited. Changed my mind about what I said.
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Re: Homebuilt space craft !

#3 Post by takatiki » Mon May 08, 2017 1:19 am

Hello lownslow !

Sorry I did not get to read it. I'd be happy to read.

This could have a jettisonable rocket that could reach M2 before igniting the engines thus saving rocket fuel. But it cannot get to Mars and back even if reloaded at LEO. But it might if reloaded at GTO. Then again it cannot get to GTO unless refueded at LEO.
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Re: Homebuilt space craft !

#4 Post by takatiki » Mon May 08, 2017 11:01 am

Here is the orbiter / re-entry vehicle.
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Re: Homebuilt space craft !

#5 Post by AirFrame » Tue May 09, 2017 6:25 am

takatiki wrote:Here is the orbiter / re-entry vehicle.
Minor nit... When the re-entry vehicle pitches up, the "wings" will blanket the front of the side-mounted speedbrakes, making them ineffective. The rear of the side speedbrakes will be left exposed in the airflow, and at an angle that will catch wind from the bottom... They're likely to get ripped off.
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Re: Homebuilt space craft !

#6 Post by Jungle Jim » Tue May 09, 2017 10:28 am

Jukka,

I don't know about the "Farmer Astronaut" but you are pushing the boundaries of being a space cadet! I doubt you will get anyone interested in this. The span alone is 98000mm which is about 321 ft. Where will you find a building to assemble this? The drawing is nice but you will need a lot more details and sound engineering data to get anyone interested. This is beyond what a few guys or a club can put tackle. Also, you are an unknown in the industry. What sort of track record do you have to make the project believable and viable? How many of your other designs have flown successfully?

Regards,

Jim
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Re: Homebuilt space craft !

#7 Post by takatiki » Wed May 10, 2017 12:07 pm

AirFrame wrote:
takatiki wrote:Here is the orbiter / re-entry vehicle.
Minor nit... When the re-entry vehicle pitches up, the "wings" will blanket the front of the side-mounted speedbrakes, making them ineffective. The rear of the side speedbrakes will be left exposed in the airflow, and at an angle that will catch wind from the bottom... They're likely to get ripped off.
Yes you are quite right. This is just a fast sketch. Certainly it is not going to be like this...if ever anything.
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Re: Homebuilt space craft !

#8 Post by takatiki » Wed May 10, 2017 12:08 pm

Jungle Jim wrote:Jukka,

I don't know about the "Farmer Astronaut" but you are pushing the boundaries of being a space cadet! I doubt you will get anyone interested in this. The span alone is 98000mm which is about 321 ft. Where will you find a building to assemble this? The drawing is nice but you will need a lot more details and sound engineering data to get anyone interested. This is beyond what a few guys or a club can put tackle. Also, you are an unknown in the industry. What sort of track record do you have to make the project believable and viable? How many of your other designs have flown successfully?

Regards,

Jim
I am absolutely no-one ( space cadet is a nice term ).....but I am a bit annoyed that we haven't been able get of the Earth orbit in 50 years.

There are few models and not even an R/C model so far.

David Luther with his craft hasn't left the Earth either; https://exospace.wordpress.com/

I am an architect by profession. If I get some more assigntments I might make a bigger model of this. Aim is to drop a small model and see if it works like planned.
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Re: Homebuilt space craft !

#9 Post by takatiki » Wed May 10, 2017 12:11 pm

I've been designing this idea of a electric high flying mothership since 2012.
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Re: Homebuilt space craft !

#10 Post by takatiki » Thu May 11, 2017 8:01 am

AirFrame wrote:
takatiki wrote:Here is the orbiter / re-entry vehicle.
Minor nit... When the re-entry vehicle pitches up, the "wings" will blanket the front of the side-mounted speedbrakes, making them ineffective. The rear of the side speedbrakes will be left exposed in the airflow, and at an angle that will catch wind from the bottom... They're likely to get ripped off.
AF any better now ? Too big to be carried under the glider...but capable to go to Mars if reloaded on LEO.
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Re: Homebuilt space craft !

#11 Post by AirFrame » Thu May 11, 2017 4:03 pm

On a craft that small, this is your mission to Mars:

https://www.youtube.com/watch?v=mjXktSdsKxg
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Re: Homebuilt space craft !

#12 Post by takatiki » Thu May 11, 2017 10:09 pm

AirFrame wrote:On a craft that small, this is your mission to Mars:

https://www.youtube.com/watch?v=mjXktSdsKxg
Well that is just the tip of the ICE BERG.

Scout team that clears the landing for the MARS OUT POST comes on that "small" ship the main body will come 3 weeks later with the mothership...using MPDT.
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Re: Homebuilt space craft !

#13 Post by takatiki » Fri May 12, 2017 7:41 pm

Wernher von Braun had this idea already in the 50ies...to fly in Mars atmosphere. It is fairly easy with an empty space craft with some lifting capacity.

I eat my pancakes with Maple Joe suryp. What do you use in Canada on your pancakes ?

About space craft propulsions ( Isaac Arthur ); https://www.youtube.com/watch?v=wXiitWK ... ture=share

So the 20-200 N what the MPDT and other ION-thrusters produce would be insane in power to weight ratio ( in a very lite craft ) as there is also no air resistance. The small 5 000 kg ( empty weight ) craft would be able to house 300 000 kg of Xenon enabling velocity change delta-v on nearly 1000 km/s.

LXe ( liquid xenon is very abundant in Mars and Jupiter where we haven't reached yet ) has 16.3 times denser volume than LH2/LOX used in chemical rockets. That is why you can fit so much of it in a small craft. The future of space travel is in Xenon !

At 24:00 ( video above ) I doubt that Isaac Arthur really means that an astronaut really weighs 1000 kg on earth ?

Weight-mass relationship

The relationship between the weight of an object and its mass is:


W = mg or m = W/g
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Re: Homebuilt space craft !

#14 Post by takatiki » Sun May 14, 2017 1:55 pm

AirFrame wrote:On a craft that small, this is your mission to Mars:

https://www.youtube.com/watch?v=mjXktSdsKxg
How about now...still 14 m shorter spanning than Stratolaunch.http://i.dailymail.co.uk/i/pix/2015/08/ ... 806097.jpg
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Re: Homebuilt space craft !

#15 Post by ccd » Sun Nov 05, 2017 2:47 am

Wow, a very complex project where did you get that information ?
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Re: Homebuilt space craft !

#16 Post by takatiki » Sat Dec 23, 2017 4:05 am

Hello CCD and Merry Christmas everyone !

I actually had to simplify it a lot...whole thing flies to Mars now.

CCD I wanted to become an aviation engineer as a kid but I had no funds so I just kept the interest for it.


This has taken 5 years to develope now.

Low EAS numeber and low wing loading at very very high...and you go beyond the heating zones...like a thief in the night.

It is called dedication !
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Re: Homebuilt space craft !

#17 Post by GyvAir » Tue Dec 26, 2017 4:42 pm

I see by your moto that you are a proponent of simplication and liteness. Wise objectives indeed, but I think the craft would be significantly improved, if upgraded with twin trimulators. I’m not sure why you’ll need two of them, or what the “u” will be signifying, but it definitely makes it roll off the tongue a little smoother for the narration in the all-important promotional videos.
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Re: Homebuilt space craft !

#18 Post by takatiki » Mon Jan 01, 2018 11:42 am

GyvAir wrote:
Tue Dec 26, 2017 4:42 pm
I see by your moto that you are a proponent of simplication and liteness. Wise objectives indeed, but I think the craft would be significantly improved, if upgraded with twin trimulators. I’m not sure why you’ll need two of them, or what the “u” will be signifying, but it definitely makes it roll off the tongue a little smoother for the narration in the all-important promotional videos.
You got it GyvAir !

This needs to look cool. All the photos taken has to look cool..like in Flight of the Phoenix.

I have now the electric engines, props etc for the 1/4 scale ( 1/60 actually )R/C model...and next comes the 1/1 scale ( 1/15 of the space ship ).
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Re: Homebuilt space craft !

#19 Post by GyvAir » Tue Jan 02, 2018 7:46 pm

Is it possible for me to use my vast Bitcoin holdings to pay the deposit fee to reserve a seat on the first Mars flight?
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Re: Homebuilt space craft !

#20 Post by takatiki » Fri Jan 05, 2018 10:59 pm

Hello Canada !

Happy new year 2018 !

Let the force be with ya all !


Yes GyvAir.....any possible credit will do. Still I think we have to advance steadily . I went to talk to a professor of astrophysics...and he borrowed me a book concerning orbital meneuvering ...he was amazed when I gave him the aerobraking drag figures ( of my ship ) above the altitude where space shuttle started to heat up. His first question was right on the money...what was the affecting area when braking ?!

The model has to perform this aerobraking maneuve flawlessly...if this does not happen we cannot advance. It is like controlled deep stall...in a way...it stalls but yet the state of stall is controlled aerodynamically..this has never been done before. We cannot use RCS all the way as it is too costly ( weight wise ).


Later aviators !
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Re: Homebuilt space craft !

#21 Post by takatiki » Sat Jan 13, 2018 11:38 am

Here is the present system..

I estimate 7 billion USD to get to Mars with 3 ships and 6 astronauts...3 crawlers.

Image
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Re: Homebuilt space craft !

#22 Post by Beefitarian » Mon Jan 29, 2018 11:38 am

$7 billion huh?

Have you thought of setting up a Kickstarter account?
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