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Unread postPosted: Tue May 20, 2008 2:14 pm
Author: Acdcmonkey1991
After deciding this is not at all feasable, I have now changed it to a co2 go-kart. :lol:

Unread postPosted: Tue May 20, 2008 2:16 pm
Author: trollhameran
why dont you try to build a scaled down version of it for as little as possible, say an 8th of the size you would build for yourself, and then see what the most mass it can lift is, times by 8 and unless im missing some incredibly important piece of information that will tell you if it could lift you

Unread postPosted: Tue May 20, 2008 2:36 pm
Author: psycix
trollhameran wrote:why dont you try to build a scaled down version of it for as little as possible, say an 8th of the size you would build for yourself, and then see what the most mass it can lift is, times by 8 and unless im missing some incredibly important piece of information that will tell you if it could lift you


Yeah, build a tiny rocket and attach a Chuck Norris doll to see if it can lift humans :D

For the water thing: You could get a tank of water up to thousands of degrees C, and then open a valve. The water flash-boils and high pressure steam bursts out.
A few days ago there was some post about a water-rocket-car that worked like this.

Unread postPosted: Tue May 20, 2008 2:37 pm
Author: MaxuS the 2nd
Acdcmonkey1991 wrote:After deciding this is not at all feasable, I have now changed it to a co2 go-kart. :lol:


I like you now. :D

Now all you need to do is build a frame and whack a Co2 propulsion system on the back.
May I ask why it needs to be Co2? You could just as easily build a small turbo engine for the amount of money it will cost you for each run of your Co2 gokart.

Unread postPosted: Tue May 20, 2008 2:55 pm
Author: trollhameran
I built a sort of trike go kart that is very light weight and could be used for this purpose,
Image

Also quick question, if you used ggdt to work out the size of chamber and pressure it would take to shift a projectile the same weight as yourself with next to no barrel, would this be accurate to tell you if you could get off the ground with it?

Unread postPosted: Tue May 20, 2008 3:38 pm
Author: BC Pneumatics
Seriously man, find some way to calculate the thrust coming from a CO2 tank with your nozzle system and everything, and then start thinking about things to propel with it.
My bet is even an A size rocket will kick a CO2 system's ass for any practical propulsion use.

Unread postPosted: Wed May 21, 2008 1:51 am
Author: Solar
ummm... Doesn't this fit under the category "Shooting animals". Or is it "Shooting AT animals" that is forum taboo?

Unread postPosted: Wed May 21, 2008 2:16 am
Author: THUNDERLORD
Like myself, your favorite starwars guy must've been Boba Fett :wink:

I just saw a show about one that uses hydrogen peroxide/something and it has over 300hp thrust and only flies for 20seconds.

I also read somewhere about one that had screens coated with metal(Alum.?) all inside and another chemical combined to produce exhaust.
It didn't combust, just the vapors gave thrust.

I was thinking since a parachute is useless below like 500feet or so,
Maybe one could have a rotor similar to a gyro-copter so when the thrusts stops the blades spin to slow the descent. The blades could angle vertical on lift and then open maybe.
But that makes me think why not attach the nozzles to the blade tips in the first place maybe.

There's an old army helicopter backpack at the Air and Space museum, and also while I was there I talked to an actual airline pilot and we were looking at the same tiny gyro-copter and He told me he owns 2 and they are loads of fun :shock: 8)
BTW I was upset when bobba-fett fell into the giant sand hole. :cry:

Unread postPosted: Wed May 21, 2008 2:18 am
Author: BigGrib
I did a radio interview with a gentleman named Nino Amarena who is the president and CEO of Thunderbolt Aerosystems and he described the system they use somewhat in depth on my show. Follow the Gribnation link in my signature to the Thunderman part 1 episode on the show archive page to listen to him describe how his jet packs work.

Unread postPosted: Wed May 21, 2008 2:51 am
Author: THUNDERLORD
BigGrib wrote:I did a radio interview with a gentleman named Nino Amarena who is the president and CEO of Thunderbolt Aerosystems and he described the system they use somewhat in depth on my show. Follow the Gribnation link in my signature to the Thunderman part 1 episode on the show archive page to listen to him describe how his jet packs work.


:idea: Holy crap if it used non-combustible fuel (so I am allowed to discuss it here) It could have an extra nozzle piped into a giant vortex or cloud. It could hover above (Targets) and rain lead down.

The military would probably buy a crap load and have squad automatic gunners with flight capability!!!
Thanks for the link, I'll have to check out GribNation. 8)

Unread postPosted: Wed May 21, 2008 12:34 pm
Author: rcman50166
lol ok... Anyway a CO2 go cart seems like a feasable idea. The only downside is you would have a lower running time. However it is not rediculous to say that the engine doesn't need to idle. This would greater extend the range of the go-cart. Another idea is to use a compressor as the brakes, similar to how an electric generator is used as the brakes on hybrid and electric cars. Rather than plain internet research I challenge you to buy an Air Hogs airplane and see how the motor works. This will probably be the baseboard to how your engine will work. By removing the idling process however, you will need a seperate electric ignition motor circuit. This is as simple as running a small DC electic motor off of a car battery interupted by a switch that is connected to the accelerator. No speed control is necessary because the motor would only serve to start the main engine; an on-off process. You've got a good idea going for ya. I hope you follow through and get one built. :)

Unread postPosted: Wed May 21, 2008 2:03 pm
Author: THUNDERLORD
rcman50166 wrote:lol ok...


Why lol? I was thinking in urban combat a troop could fly up to a roof top and set up an MG nest within seconds.
Or hit positions on the other side of a building. Or land from above on the roof of a building full of enemy opponents.

Edit: you probably wrote lol 'cause my reply sounded like a joke or impossible. Seriously, If the military used them for urban combat and explodability/weight was an issue it could be carried in a humvee or other vehicle and besides being equipped with MG the pilot could carry big mortars up to a roof top in seconds also!!!
Hope BigGrib sees this and maybe runs it by his friend.

Unread postPosted: Wed May 21, 2008 3:08 pm
Author: BigGrib
Oh yeah, that's one of the uses we talked about during the interview was for military and SAR operations, or for firefighters and other ideas. right now they are flying for about 75 seconds i believe it was anyway yeah lots of uses

Unread postPosted: Wed May 21, 2008 4:27 pm
Author: trollhameran
what if instead of using compressed air, you used combustion, like a jet engine, but use a slow burning fuel rather than a fast burning fuel like you use in a combustion cannon

Unread postPosted: Wed May 21, 2008 7:38 pm
Author: rcman50166
THUNDERLORD wrote:
rcman50166 wrote:lol ok...


Why lol? I was thinking in urban combat a troop could fly up to a roof top and set up an MG nest within seconds.
Or hit positions on the other side of a building. Or land from above on the roof of a building full of enemy opponents.

Edit: you probably wrote lol 'cause my reply sounded like a joke or impossible. Seriously, If the military used them for urban combat and explodability/weight was an issue it could be carried in a humvee or other vehicle and besides being equipped with MG the pilot could carry big mortars up to a roof top in seconds also!!!
Hope BigGrib sees this and maybe runs it by his friend.


Well yes that, and the fact the military has already experimented with the idea, even coming out with several prototypes. In the end they scrapped the project because it wasn't practical. They also claimed the potential spycraft (it's original purpose) was just plain too loud.