Questions tagged [rd-180]

One half of an RD-170 engine, used by Atlas V booster, built by NPO Energomash. Burns LOX/Kerosene.

Filter by
Sorted by
Tagged with
3
votes
1answer
84 views

Why does the RD-180 route the preburner exhaust directly into the LOX boost pump turbine?

Isn't there $\mathsf{CO_2}$ and $\mathsf{H_2O}$ in the oxygen-rich preburner discharge? Why aren't the Russians worried that these two would freeze when the discharge is re-condensed into the LOX ...
6
votes
1answer
377 views

What is the source of the 'whoop' sound made before the liftoff (T-3s) of Atlas-V rocket?

For reference, you can hear the distinct 'whoop' sound at T minus 3 seconds mark of the recent TDRS-M launch. This sound has been distinctive for most previous Atlas-V launches as far as I can ...
8
votes
1answer
1k views

Why can't Pratt & Whitney make RD-180 engines on their own?

From Wikipedia: Under RD AMROSS, Pratt & Whitney is licensed to produce the RD-180 in the United States. Originally, production of the RD-180 in the US was scheduled to begin in 2008, but this ...
4
votes
1answer
334 views

What was RD-180 used in, before Atlas III/V?

At NasaSpaceFlight.com, Chris Gerbhart writes: The RD-180 has provided exceptional performance to the Atlas V and was chosen to be the engine of the first stage in no small part because of its ...
3
votes
1answer
359 views

Would two RD-190's be better or worse than a single RD-180?

With all the talk of re-engining Antares, many possibilities arise. Solids, new liquid engine, existing Russian engines (RD-180, RD-190), etc. Focussing on the RD-1xx family though, an RD-180 is a ...
2
votes
1answer
2k views

What are the costs of the various different engines in current use?

This may be impossible to answer, since the data is often not disclosed. But in an article, about ULA getting RD-180's from Russia it claims: Each engine reportedly costs between \$11 to \$15 ...
1
vote
3answers
1k views

What replacement engine options are there for Antares?

Lots of articles out about how Orbital Sciences is talking with three vendors for a replacement for the NK-33/AJ26 engine pair currently used on the Antares booster. An article on SpaceNews notes ...
3
votes
1answer
1k views

How is an RD-180 engine a reasonable replacement for 2 NK-33/AJ-26 engines on Antares?

Orbital Sciences, which uses 2 Russian NK-33 engines on its Antares booster, has been suing Lockheed Martin/ULA over anti-trust violations, since they were not allowing Orbital to buy RD-180 engines, ...