ETG used to Launch Rocket

Meaningful discussion outside of the potato gun realm. Projects, theories, current events. Non-productive discussion will be locked.
sagthegreat
Specialist 3
Specialist 3
Posts: 343
Joined: Thu Feb 16, 2012 5:23 pm
Location: Leesburg
Contact:

Thu Jul 11, 2013 10:19 pm

My radical idea for today is: Would Using a ETG cannon type setup where a metal is turned into plasma be enough to propel a rocket. THe rocket will be brought to 100k feet by weather balloon, then the charged capacitor bank will set off the plasma reaction and propel the rocket?
User avatar
POLAND_SPUD
Captain
Captain
Posts: 5402
Joined: Sat Oct 13, 2007 4:43 pm
Been thanked: 1 time

Fri Jul 12, 2013 12:08 am

my question why not launch a rocket using large amounts of TNT... which in turn fires a cannon... which fires a large weather balloon... that then fires a TOW missile which in turn fires another rocket ? :lol:


now seriously - just use traditional propelants - save weight and reduce complexity

is it really a serious project ?? I have some doubts - last time I checked launching rockets was somewhat regulated in the US and A so your weather balloon and an ETG launching a freaking rocket seems almost as legal as a weather balloon with a rocket launched using conventional methods so why overcomplicate stuff ??
Children are the future

unless we stop them now
sagthegreat
Specialist 3
Specialist 3
Posts: 343
Joined: Thu Feb 16, 2012 5:23 pm
Location: Leesburg
Contact:

Fri Jul 12, 2013 10:03 am

Because the Capaciter Bank could be sepeate, and not attached to the rocket, reducing weight, also I could fill it with helium too, so the plasma along with superhot helium at high pressure shoots out of the nozzle. I want to enter the international science fair, so i am looking for a innovative idea like this
User avatar
D_Hall
Staff Sergeant 4
Staff Sergeant 4
Posts: 1879
Joined: Thu Feb 07, 2008 7:37 pm
Location: SoCal
Been thanked: 11 times
Contact:

Donating Members

Fri Jul 12, 2013 2:47 pm

Whooooboy....

A balloon to 100 kft with a rocket payload.

A gun firing a pyrotechnic payload.

The legal mess alone (you're going to be dealing with both the FAA and ATF) should be enough to convince anyone who doesn't have a team of lawyers on retainer to just walk away from this one. Or you could go for it and accept that you'll likely be paying six figure fines and possibly jail time if you publish (read: admit that you did it).
Simulation geek (GGDT / HGDT) and designer of Vera.
PVC Arsenal 17
Staff Sergeant 3
Staff Sergeant 3
Posts: 1762
Joined: Mon Mar 27, 2006 4:18 pm
Location: United States

Fri Jul 12, 2013 5:13 pm

http://en.wikipedia.org/wiki/Non-rocket_spacelaunch

Here's a list of innovative ideas. ETG's are a bit over-the-top for a thing like this.
User avatar
mark.f
Sergeant Major 3
Sergeant Major 3
Eritrea
Posts: 3566
Joined: Sat May 06, 2006 11:18 am
Location: The Big Steezy
Has thanked: 13 times
Been thanked: 9 times
Contact:

Donating Members

Fri Jul 12, 2013 6:40 pm

six figure fines
roflmbao
sagthegreat
Specialist 3
Specialist 3
Posts: 343
Joined: Thu Feb 16, 2012 5:23 pm
Location: Leesburg
Contact:

Sat Jul 13, 2013 9:00 pm

D_Hall wrote:Whooooboy....

A balloon to 100 kft with a rocket payload.

A gun firing a pyrotechnic payload.

The legal mess alone (you're going to be dealing with both the FAA and ATF) should be enough to convince anyone who doesn't have a team of lawyers on retainer to just walk away from this one. Or you could go for it and accept that you'll likely be paying six figure fines and possibly jail time if you publish (read: admit that you did it).
I read it, the gun doesn't fire the rocket, the rocket is essantially an egg gun turned upside down with nozzles and fins
User avatar
D_Hall
Staff Sergeant 4
Staff Sergeant 4
Posts: 1879
Joined: Thu Feb 07, 2008 7:37 pm
Location: SoCal
Been thanked: 11 times
Contact:

Donating Members

Sun Jul 14, 2013 2:43 am

sagthegreat wrote:I read it, the gun doesn't fire the rocket, the rocket is essantially an egg gun turned upside down with nozzles and fins
Ah.... Didn't read it right. OK, fair enough... Still some FAA requirements to be met.
Simulation geek (GGDT / HGDT) and designer of Vera.
User avatar
dart guy
Specialist 3
Specialist 3
Posts: 394
Joined: Mon May 13, 2013 7:54 pm
Location: not telling you

Sun Jul 14, 2013 5:33 am

bad idea...
i like it but that would be a serious amount of heat
sagthegreat
Specialist 3
Specialist 3
Posts: 343
Joined: Thu Feb 16, 2012 5:23 pm
Location: Leesburg
Contact:

Sun Jul 14, 2013 1:02 pm

dart guy wrote:bad idea...
i like it but that would be a serious amount of heat
Hence y I'm considering also filling it up with co2 and putting a burst disk on the nozzle, the heat will dissipate in the co2 while also increasing the pressure exponantially..
User avatar
matti
Specialist 2
Specialist 2
Finland
Posts: 251
Joined: Tue Oct 04, 2005 1:01 pm

Tue Jul 16, 2013 2:55 pm

Some electrically powered propulsion: http://en.wikipedia.org/wiki/Pulsed_plasma_thruster

and,
http://en.wikipedia.org/wiki/Rocket_eng ... ly_powered

Not sure how would you get the ET reaction to last for some practical time for propelling the rocket. Also the presumably high pressure of the reaction would make it necessary to have a large rocket nozzle (http://en.wikipedia.org/wiki/Rocket_engine_nozzle)
Post Reply