[amsat-bb] Re: Model Rocket Booster Engine for Picosatellite

G0MRF at aol.com G0MRF at aol.com
Tue Jan 17 11:42:52 PST 2012

Thanks Joe. 
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.


Joe Leikhim

Leikhim and Associates
Communications  Consultants
Oviedo,  Florida


JLeikhim at Leikhim.com


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