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Re: Leaking out the nozzle



My apologies, you are correct.   In the post
burn attitude, with the satellite pointing its
thrust vector along the velocity vector at
perigee ( and thus against it at apogee), we
have been adding approximately the same
delta-V at perigee that we are subtracting
at apogee with the leak.  Unfortunately, as I
tried to point out in the previous message,
as a percentage of the velocities,  the overall
effect on the orbit is much larger when this
delta-V is applied at apogee since that is
the place it is moving with the least speed.

Thanks for the correction.

Bob
N4HY
----- Original Message ----- 
From: "Richard W L Limebear" <Richard@g3rwl.demon.co.uk>
To: <rwmcgwier@home.com>; <amsat-bb@amsat.org>
Sent: Wednesday, January 10, 2001 1:38 PM
Subject: Re: [amsat-bb] Leaking out the nozzle


> "MCGWIER ROBERT" writes:
> 
> > At perigee, the loss of velocity due to the mass
> > loss is TINY as a percentage, compared to
> > the velocity loss as a percentage of the total
> > at apogee.
> 
> Shouldn't that be "increase" at perigee and "loss" at apogee.
> 
> I drew a graphic to demonstrate this. Its on the Amsat-UK website at:
> <http://www.uk.amsat.org/phase3d.htm>
> 
> 73
> Richard W L Limebear G3RWL
> g3rwl@amsat.org
> FOC # 1188
> 
>           So many beautiful girls ..... (sob) so little time
> 

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