RD-801

The RD801 (Ukrainian: РД801) is a Ukrainian liquid propellant rocket engine burning LOX and Kerosene (RG-1) in a staged combustion cycle.^[4] It has a single combustion chamber that provides thrust vector control by gimbaling of the nozzle in two axis by +/- 6°. It is being designed in Ukraine by Yuzhnoye Design Bureau for the prospective first stage propulsion of the Mayak rocket family.^[4][2]

RD801 (РД801)

Country of origin	Ukraine
Designer	Yuzhnoye Design Bureau
Manufacturer	Yuzhmash
Application	First Stage
Status	In development
Liquid-fuel engine
Propellant	LOX / RG-1
Mixture ratio	2.65
Cycle	Staged Combustion
Configuration
Chamber	1
Performance
Thrust, vacuum	1,340 kN (300,000 lbf)
Thrust, sea-level	1,198 kN (269,000 lbf)
Chamber pressure	18 MPa (2,600 psi)
Specific impulse, vacuum	336 s (3.30 km/s)
Specific impulse, sea-level	300.7 s (2.949 km/s)
Burn time	200 s
Gimbal range	6
Dimensions
Dry mass	1,630 kg (3,590 lb)
References
References	[1][2][3][4]

The RD801 as well as the RD-810 are being designed based on the work of the RD-8 vernier and the maintenance and improvement of the RD-120 engines. The RD801 can be used stand alone on a Mayak or in a cluster.^[2]

Versions

The designers have proposed three versions of this engine:

• RD801 (Ukrainian: РД801): This is the basic module with no TVC.^[2]
• RD801 (Ukrainian: РД801): This is a version which includes a TVC by gimbaling of the nozzle in two axis by +/- 6°.^[2]
• RD801V (Ukrainian: РД801В): High altitude of the rocket engine with extended nozzle.^[2]

See also

• Mayak – Prospective Ukrainian launch vehicle family for which the RD801 is being developed.
• RD-8 – The Zenit second stage vernier engine which was the technological base for the RD801.
• RD-120 – The Zenit second stage main engine which was the technological base for the RD801
• RD-810 – A higher thrust engine of the same family.
• Yuzhnoe Design Bureau – The RD810 designer bureau.
• Yuzhmash – A multi-product machine-building company that's closely related to Yuzhnoe and would manufacture the RD801.
• YF-100 – A Chinese rocket engine of similar specifications based on RD801 design.