Back to the Purdue AAE Propulsion main page.
Back to the Liquid Rockets page.
RD-120
The RD-120 is the second stage engine of the Russian Zenit launch vehicle.
Pratt is working with NPO-EM on a modified version for a first-stage small
launch vehicle engine, to be designated RD-120M. Changes include
a smaller nozzle and gimbals for thrust vectoring. The engine will be
manufactured in Russia. (This information is vintage June 1996, things
may have changed since then.)
Engine statistics
| Specification |
|
| Applications |
Zenit 2nd stage |
| Propellants |
LOX/kerosene |
| Thrust in Vacuum |
187,400 lb |
| Isp in vacuum(s) |
350 |
| Mixture Ratio |
2.6:1 |
| Weight |
2480 lb |
| Chamber Pressure |
2361 psia |
| Expansion Ratio |
106:1 |
| Engine Cycle |
staged combustion |
| Pump Design Pressures |
???? |