| RD-810 (РД-810) | |
| Country Of Origin: | Ukraine |
| Designer: | Yuzhnoye Design Bureau |
| Manufacturer: | Yuzhmash |
| Purpose: | First Stage |
| Status: | In development |
| Type: | liquid |
| Oxidiser: | LOX |
| Fuel: | RP-1 |
| Mixture Ratio: | 2.65 |
| Cycle: | Staged Combustion |
| Combustion Chamber: | 1 |
| Thrust(Vac): | 2105kN |
| Thrust(Sl): | 1876kN |
| Chamber Pressure: | 18MPa |
| Specific Impulse Vacuum: | 335.5isp |
| Specific Impulse Sea Level: | 299isp |
| Gimbal: | 8 |
| Dry Weight: | 2800kg (6,200lb) |
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.