J
jimfromnsf
Guest
The part that defines an "engine" is the turbopump. Soyuz has 5 turbopumps.<br />RD-170: 1 turopump 4 nozzles<br />RD-180 : 1 turbopump 2 nozzles<br />MA-5A booster package: 1 turbopump 2 nozzles<br /><br />