RBVZ-6

RBVZ-6
RBVZ-6 engine fitted to Sikorsky Ilya Muromets No.167
TypeWater-cooled inline-six aero engine
National originRussian Empire
ManufacturerRusso-Baltic Wagon Factory (RBVZ)
First run1915
Major applicationsSikorsky Ilya Muromets
Number built70
Developed fromBenz Bz.III

The RBVZ-6 (Russian: РБВЗ-6) was a WW1-era inline-six aircraft engine first built by the Russo-Baltic Wagon Factory (RBVZ) at their workshop in Riga with production later moving to Petrograd and then to Moscow.

The engine was based on the Benz Bz.III with modifications to suit the materials and manufacturing techniques available in the Russian Empire. The changes resulted in the RBVZ-6 being heavier and less powerful than the German original.

RBVZ-6 engines powered several variants of the Sikorsky Ilya Muromets aircraft where they proved highly reliable. RBVZ-6 engines remained in service with the Ilya Muromets fleet until 1922 by which time the model had been redesignated as the M-1 under the Soviet's aircraft engine numbering system.

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