RD-8
Sign in to saveThe RD-8 (Russian: and GRAU Index: 11D513) is a Soviet / Ukrainian liquid propellant rocket engine burning LOX and RG-1 (a rocket grade kerosene) in an oxidizer rich staged combustion cycle. It has four combustion chambers that provide thrust vector control by gimbaling each of the nozzles in a single axis ±33°. It was designed in Dnipropetrovsk by the Yuzhnoye Design Bureau as the vernier thruster of the Zenit (GRAU: 11K77) second stage. As such, it has always been paired with the RD-120 engine for main propulsion.
Key facts
- Rocket engine.name
- RD-8 (РД-8)
- Rocket engine.image
- File:11Д513.jpg
- Rocket engine.country_of_origin
- Soviet Union
- Rocket engine.first_date
- April 13, 1985
- Rocket engine.designer
- Yuzhnoye Design Bureau
- Rocket engine.manufacturer
- Yuzhmash
- Rocket engine.purpose
- Second Stage Vernier
- Rocket engine.associated
- Zenit
- Rocket engine.successor
- RD-809M
- Rocket engine.status
- In Production
- Rocket engine.type
- liquid
- Rocket engine.oxidiser
- LOX
- Rocket engine.fuel
- RG-1
- Rocket engine.mixture_ratio
- 2.4
- Rocket engine.cycle
- Staged Combustion
- Rocket engine.combustion_chamber
- 4
- Rocket engine.burn_time
- 1100 s
- Rocket engine.gimbal
- ±33°
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The RD-8 (Russian: and GRAU Index: 11D513) is a Soviet / Ukrainian liquid propellant rocket engine burning LOX and RG-1 (a rocket grade kerosene) in an oxidizer rich staged combustion cycle. It has four combustion chambers that provide thrust vector control by gimbaling each of the nozzles in a single axis ±33°. It was designed in Dnipropetrovsk by the Yuzhnoye Design Bureau as the vernier thruster of the Zenit (GRAU: 11K77) second stage. As such, it has always been paired with the RD-120 engine for main propulsion.
It can only be started once, and as a high altitude engine it has a thrust of and a specific impulse of . It is the first ever steering engine to use the staged combustion cycle, and as such is the basis for a family of planned engines for the Mayak launch vehicle family.