RD-0110R

{{Infobox rocket engine

|name = RD-0110R

|image = PlesetskRocketLaunch2019-02.jpg

|image_size =

|caption = The four nozzles of the RD-0110R surround the large single nozzle of the NK-33 engine on the first stage of the Soyuz-2.1v.

|country_of_origin=Russia

|date =

|first_date = 2013-12-28

|last_date =

|designer =KBKhA, Viktor Gorokhov

|manufacturer =Voronezh Mechanical Plant

|purpose =1st stage vernier engine

|associated =Soyuz-2.1v

|predecessor =RD-0110

|successor =

|status =Retired

|type =liquid

|fuel =RG-1

|oxidiser =LOX

|mixture_ratio =

|cycle =Gas-generator

|pumps =

|description =

|combustion_chamber=4

|nozzle_ratio =

|thrust =

|thrust_at_altitude=

|thrust(Vac) ={{cvt|265.1|kN}}

|thrust(SL) ={{cvt|230.5|kN}}

|thrust_to_weight=

|chamber_pressure={{cvt|6.6|MPa}}

|specific_impulse=

|specific_impulse_vacuum={{cvt|298.4|isp}}

|specific_impulse_sea_level={{cvt|259.4|isp}}

|total_impulse =

|burn_time =210 seconds

|capacity =

|dimensions =

|length ={{cvt|1910|mm}}

|diameter ={{cvt|2675|mm}}

|dry_weight ={{cvt|850|kg}} including the support ring

|used_in =Soyuz-2.1v first stage

|references =

|notes =

}}

The RD-0110R ({{Langx|ru|Ракетный Двигатель-0110Р (Р - рулевой)|Raketnyy Dvigatel-0110R|Rocket Engine 0110R (R - rulevoy, steering)}}, GRAU index: 14D24) was a rocket engine burning kerosene in liquid oxygen in a gas generator combustion cycle. It had four nozzles that can gimbal up to 45 degrees in a single axis and was used as the vernier thruster on the Soyuz-2.1v first stage. It also had heat exchangers that heat oxygen and helium to pressurize the LOX and RG-1 tanks of the Soyuz-2.1v first stage, respectively. The oxygen was supplied from the same LOX tank in liquid form, while the helium was supplied from separate high pressure bottles (known as the T tank).

The engine's development started in 2010 and it is a heavily modified version of the RD-0110. The main areas of work were shortening the nozzles to optimize them for the atmospheric part of the flight (the RD-0110 is a vacuum optimized engine), propellant piping, heat exchangers and the gimballing system, which was developed by RKTs Progress. The RD-0110R engine was produced at the Voronezh Mechanical Plant.