|Country of origin||Ukraine|
|Designer||Yuzhnoye Design Bureau|
|Propellant||LOX / RG-1|
|Thrust (vac.)||2,105 kN (473,000 lbf)|
|Thrust (SL)||1,876 kN (422,000 lbf)|
|Chamber pressure||18 MPa (2,600 psi)|
|Isp (vac.)||335.5 s (3.290 km/s)|
|Isp (SL)||299 s (2.93 km/s)|
|Dry weight||2,800 kg (6,200 lb)|
The RD-810 (РД-810) is a Ukrainian liquid propellant rocket engine burning LOX and Kerosene (RG-1) in a staged combustion cycle. It has a single combustion chamber that provides thrust vector control by gimbaling of the nozzle in two axis by +/- 8°. It is being designed in Ukraine by Yuzhnoye Design Bureau for the prospective first stage propulsion of the Mayak rocket family.
The RD-810 as well as the RD-801 are being designed based on the work of the RD-8 vernier and the maintenance and improvement of the RD-120 engines. The RD-810 can be used stand alone on a Mayak or could be used in a module of four called RD-810M to replace the RD-170 on the Zenit.