I have developed the perfect solution;
A gatling gun type canister for the rocket motors would solve all of
your objections per below:
On 1/17/2012 4:22 PM, Ken Ernandes wrote:
How would attitude be controlled so the thrust is in the correct direction?
Spin stabilization about the maximum moment off inertia axis is probably the
best choice. This would require a magnetic torquing system.
Yes just like other missions.
Another issue is the thrust needs to be directed through the spacecraft's
center-of-mass or there will be stability problems. How would a cluster be
fired individually with each, in turn, directed through the center of mass?
That's a complex design problem.
A motorized canister with 6 to 8 motors aligned such that the active
motor is aligned through the COM. Picture a revolver or gatling gun.
One more issue is that when you carry multiple motors, the first must
accelerate the mass of the unfired motors, so the early firing will be less
effective. The mass of the spent casings will need to be accelerated buy the
subsequent motor firings.
Spent casings would be ejected using the ejection charge normally used
for deploying a parachute. Just as with any fuel, the mass of the
unfired fuel will create mass for the initial firings.
You do have some work to do before you have a practical solution.
Work is done. Took about 4 minutes. Coffee break now!
73, Ken N2WWD
Sent from my iPad
On Jan 17, 2012, at 3:44 PM, Joe Leikhim<[email protected]> wrote:
David;
There are some much bigger motors! Ask the Level-3 rocketry folks! Anyway a
cluster of medium sized motors could be fired individually as required to raise
altitude. I would think that SRB's would be more reliable and safer than
hypergolic used on previous Oscars. There would of course be a lot of heat in
the rocket casings that would need to be dissipated.
--
Joe Leikhim
Leikhim and Associates
Communications Consultants
Oviedo, Florida
www.Leikhim.com
[email protected]
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--
Joe Leikhim
Leikhim and Associates
Communications Consultants
Oviedo, Florida
www.Leikhim.com
[email protected]
407-982-0446
Note to GMail Account users. Due to an abnormally high volume of spam
originating from bogus GMail accounts, I have found it necessary to block
certain GMail traffic. Please phone me if you believe your message was not
received.
_______________________________________________
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Not an AMSAT-NA member? Join now to support the amateur satellite program!
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