Questions tagged [engine-design]

Questions regarding the design or design process for a propulsion system.

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13 votes
5 answers
6k views

Can a rocket motor be shut off after ignition?

After ignition, if any problems occur such as fuel leakage, can a rocket motor can be shut off?
Krishna Raja's user avatar
14 votes
1 answer
3k views

Are MMH and UDMH interchangeable?

Can Monomethylhydrazine and Unsymmetrical dimethylhydrazine be used one in place of another for the class of the existing orbital maneuver engines (with reduced performance may be)? Such as Shuttle's ...
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14 votes
2 answers
19k views

Efficient types of nozzles used in rockets

Is there any other type of nozzle other than common convergent-divergent nozzle (see picture below) which is used in many rockets?             ...
Hash's user avatar
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15 votes
1 answer
2k views

Changes made to ISRO GSLV-D5's CUS and FBTP since GSLV-D3's LH2/LOX CUS failure to sustain ignition?

The launch of the ISRO GSLV-D5 launching India's GSAT 14 advanced communications satellite (weighing 1,980 kg) is slated for 19th of August, 2013, flying in the GSLV Mk.2 configuration with an Indian-...
TildalWave's user avatar
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15 votes
2 answers
2k views

Why was the NERVA program dropped?

At the very end, NERVA (Nuclear Engine for Rocket Vehicle Application) had developed nearly flight-ready engines able to: operate for periods in excess of an hour while providing maximum thrust up to ...
Hash's user avatar
  • 18.1k
9 votes
1 answer
453 views

Any other countries/companies doing anything similar to British Skylon SSTO?

I was reading about the British Skylon SSTO (Single Stage To Orbit) vehicle and its SABRE engine described in Wikipedia. The engine technology looks remarkable, if not revolutionary. Is this a unique ...
Anthony X's user avatar
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25 votes
2 answers
5k views

Why do pressure fed engines have combustion instabilities?

Reading about the Sea Dragon idea, I came upon this argument against it, which sounds compelling, but relies on more detailed knowledge than I have: Those are to be pressure-fed to avoid "...
AlanSE's user avatar
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16 votes
1 answer
899 views

At what travel distances are ion engines faster and more efficient than conventional fuel engines?

According to Scientific American (February 2009), ion engines start off slow, but build up speed as they travel. At what travel distance would an ion engine (such as an ion thruster, a Hall thruster, ...
JKor's user avatar
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