Re: ISS Service Module Thruster Test Fails -- first story on line


"hop" <hellsownpuppy@xxxxxxxxx> wrote in message
news:1146092921.169397.151240@xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx
Jeff Findley wrote:
How about the ATV? The quick search I did says "The ATV uses up to 4.7
tonnes of propellant to raise the ISS altitude which naturally decreases
with the residual atmospheric drag.". It's also able to "carry 9 tonnes
of
scientific equipment, general supplies, water, oxygen and propellant".
What's not clear to me is whether or not it's own engines use the same
tanks
which would be used to transfer propellant to (and from?) ISS.

My memory is that ATV can supply propellant to ISS, but it's own
thrusters use N204/MMH, while ISS/Soyuz/Progress use N204/UDMH

So if the SM's main engines fail completely, then only Progress can use the
fuel left in the ISS tanks.

Jeff
--
Remove icky phrase from email address to get a valid address.


.

Relevant Pages

  • Re: Is Crew Launch Vehicle Too Big?
    ... >> The main difference in weight between the ISS CEV and the Lunar CEV ... >> is going to be service module propellant. ... The CEV main engine is a bit large for ISS reboost, ...
    (sci.space.policy)
  • Re: ISS Service Module Thruster Test Fails -- first story on line
    ... tonnes of propellant to raise the ISS altitude which naturally decreases ... with the residual atmospheric drag.". ... scientific equipment, general supplies, water, oxygen and propellant". ... which would be used to transfer propellant to ISS. ...
    (sci.space.station)
  • Re: ISS Service Module Thruster Test Fails -- first story on line
    ... transfer only possible from Progress to ISS? ... So even if both of the engines on the SM fail completely and cannot be ... scientific equipment, general supplies, water, oxygen and propellant". ...
    (sci.space.station)