[FPSPACE] update - Progress launch failure (1st in history)
bhen at telenet.be
Fri Aug 26 19:39:00 EDT 2011
Charles Vick wrote :
The difference between the Progress/Soyuz-U verses the Soyuz-FG for Soyuz-TMA is difference mods but it appears to be the basic same system except the Progress/Soyuz-U booster uses the much older 11D55 known as the RD-0110 engine on the third stage versus the Soyuz-FG that uses the new closed cycle RD-0124 engine. So there may be some light at the end of the tunnel for the proven entirely clean record of the Soyuz-FG booster for late September or an early October human crewed launch since the hardware is different..
A correction : both the Soyuz-FG and the Soyuz-U use the RD-0110 engine, which is exactly why the Progress launch failure threatens to ground upcoming Soyuz missions. Soyuz-FG differs from Soyuz-U in that it has improved fuel injectors in the core stage and strap-on boosters (FG stands for “forsunochnaya golovka”, Russian for “fuel injector”). The third stage propulsion system on Soyuz-U and Soyuz-FG is identical. The new RD-0124 engine is carried by the Soyuz-2.1b.
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