"Jorge R. Frank" wrote in message
...
Chris Bennetts wrote in
:

Jeff Findley wrote:

So can fuel on ISS be transferred to a docked Progress, or is fuel
transfer only possible from Progress to ISS?

I'm 99% sure that transfers can be made in either direction.

Make that 100%. :-)

So even if both of the engines on the SM fail completely and cannot be
revived, you can still transfer fuel from ISS to a docked Progress which can
burn it's engines for reboost.

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.

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