[amsat-bb] Re: Model Rocket Booster Engine for Picosatellite
dguimon1 at san.rr.com
Wed Jan 18 12:18:22 PST 2012
It is certainly refreshing to see you, David, Joe, etal discussing
new ideas, and methods, designs for our future hamsats....Kudos to
Peter ESSA for their efforts..
I'm 90, and old man, but it gives me the same thrill I got 30 years
ago when I made my first amateur satellite contact...I am well aware
of the need for funds. but with the determination that all exhibit,
it will get done....
You can surely imagine the "pie in the sky" it was in those early years...
All, keep up the good work!!!
>Aah but David, its a start along the lines you and I have been
>trying to drum up interest. You gotta crawl before you walk. As you
>know well, it's the way to start out in LEO (cheaper launch) and
>then nudge it into MEO. I said before, it's gonna happen since it's
>the obvious solution to getting to a better orbit. A lot to overcome
>but there's work going on now to get there.
>Did someone say that the new Delfi satellite will have some thrust
>on board or was it a wishful dream on my part??
>Regards...Bill - N6GHz
>On 1/17/2012 11:42 AM, G0MRF at aol.com wrote:
>>What an exciting concept.
>>Having got really enthusiastic, I thought I would roughly calculate how
>>high one of these little rockets could raise the orbit.
>>Given that one rocket reload pack has
>>40 Newtons of thrust
>>and lasts for about one second
>>We have 40 Newton seconds of specific impulse.
>>The mass flow rate is 18.6g in one second or 0.0168kg/s
>>So.....the ISP (a bit vague here) is around 219 seconds (ave thrust / mass
>>flow rate / 9.81ms^2)
>>Which should get a 3.7kg satellite's apogee about..... 40km higher.
>>So...Not enough for P3E then
>>Oh well, not so exciting after all. Time for a beer.
>>73 David G0MRF
>>In a message dated 17/01/2012 03:56:37 GMT Standard Time,
>>rhyolite at nettally.com writes:
>>Has anyone seen this. I am surprised a shuttle mission permitted this
>>type of booster. From what I believed, safety concerns prevented most
>>types of boosters.
>>Leikhim and Associates
>>JLeikhim at Leikhim.com
>High Sierra Microwave
73, Dave, WB6LLO
dguimon1 at san.rr.com
Disagree: I learn....
Pulling for P3E...
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