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Mass of Soyuz stages at burnout - fuel left?



 
 
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Old December 30th 03, 10:27 PM
Henry Spencer
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Default Mass of Soyuz stages at burnout - fuel left?

In article ,
Josh Gigantino wrote:
This is research for my books. Any help would be appreciated, for any
currently available launchers, esp Soyuz, Proton and Delta. I'm trying
to spec out how much fuel would be available from burned out rocket
stages for use by robotic "scavengers" in the storyline...


The usual rule of thumb, in the West at least, is that residual fuel left
in the tanks and plumbing is 1% of the initial load. However, in the past
some stages have specified more aggressive residual percentages, e.g. 0.5%
for Titan II first stage, 0.25% for S-IV (and the S-IV, at least,
typically beat the spec substantially). So you really need to know the
individual vehicle. And it's information that often doesn't make it into
the user's manual, alas, which means there is no recourse except to talk
to the launch supplier.

know how to find/calculate this info so that I can figure out how much
delta-V they would have available.


About the only thing you can do is read the user's manuals and see if they
give a mass breakdown at cutoff. They are mostly available on-line.
--
MOST launched 30 June; science observations running | Henry Spencer
since Oct; first surprises seen; papers pending. |
 




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