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30 votes
Accepted

Why is the X-37B's large nozzle offset to right from the spacecraft's mid-plane?

First off, it's absolutely an engine nozzle. Some sources say X-37B has a storable biprop propulsion system with ~900N thrust. The Aerojet R-42 is such an engine and the dimensions look about right --...
Russell Borogove's user avatar
12 votes

Why will SLS Block I bring less mass to LEO than the STS shuttle system did?

It's always difficult to make apples-to-apples comparisons between the space shuttle and other launchers, because the orbiter is ambiguously part launcher and part payload. This is compounded by the ...
Russell Borogove's user avatar
8 votes
Accepted

Help me find old study of huge space shuttle with 1,000 ton payload

The only serious launcher proposal I've ever heard of at that scale was Sea Dragon. Sea Dragon doesn't quite fit your recollection, though. It's a 500-ton to LEO design, not 1000 tons, with a liftoff ...
Russell Borogove's user avatar
8 votes

What hardware does SLS actually share with STS?

Partial answer The SSMEs / RS-25 are mostly reused but some parts have been redesigned. (Since SLS expends the RS-25s, in the unlikely case that it flies a lot, they plan to gradually improve new ...
Organic Marble's user avatar
5 votes
Accepted

Are any more details on the September 5, 2007 "Ares-1X Steel Rod Mishap During Static Strip Test at KSC Parachute Refurbishment Facility" available?

After some digging I could find a presentation that has references to the mishap. It also had the URL of the Nasa Safety Centre where I could find the report, the presentation is probably based upon. ...
TrySCE2AUX's user avatar
  • 3,255
4 votes
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Would the Space Shuttle External Tank have made orbit as a VT SSTO with 6 SSMEs?

What the equations I used completely ignore is initial thrust to gross launch mass which'd surely affect gravity drag? ... What is the assumption behind the 9.7 km/s delta-v on the Wikipedia page as ...
Russell Borogove's user avatar
3 votes

Why is the X-37B's large nozzle offset to right from the spacecraft's mid-plane?

It is indeed the main propulsion system, powered by hydrazine and nitrogen tetroxide, hence the hazmat suits. The team wearing those suits checks the vehicle over and then hose it down, after which ...
Calli Arcale's user avatar
1 vote

What hardware does SLS actually share with STS?

Orion & the second (third?) stage are all new (at least to STS hardware). Orion's service module, the European Service Module supplied by the European Space Agency (ESA) and built by Airbus ...
Jörg W Mittag's user avatar

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