Mass of Soyuz stages at burnout - fuel left?

(Josh Gigantino) wrote in message om...
I am trying to find out how much extra LOx and kero are left at
burnout for the 2nd (Core) and 3rd stages of an average Soyuz launch?
I'm trying to find the answer online, but would also like to know if
there are any ways to calculate or look it up in reference.

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 idea is
that the scavengers harvest the available fuel and use it to boost to
GEO or a transfer orbit to a near-Earth comet core. I would like to
know how to find/calculate this info so that I can figure out how much
delta-V they would have available.

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. |