Rotomotor RM-85FS 4-stroke gasoline airplane 2 cylinder
The RM-85FS-NG is a new 4-stroke petrol engine that is characterized by smooth running, high torque and high workmanship. Since May 2014, the RM-85-FS-NG has had more power and better throttle response.

The engine can be used in all areas of model flying. Scale and semi-scale lovers have been waiting for a 4-stroke drive like this for a long time.

Main data:

Displacement: 85.0 cm³
Bore: 39.5mm
Speed: 900 -6000 1/min
Weight: approx. 2960g (including ignition, manifold intake funnel)
Crankshaft: 3 ball bearings
Air screws*: 26 - 28 inches
Connecting rod: 4x needle bearings
Fuel: Normal unleaded/synthetic oil 1:40
electronic ignition
Ignition supply voltage: 4.8 - 9.0 V
Speeds with EM wooden propellers:

25x10 - 6300 rpm
26x10 - 5400 rpm
27x10 - 4850 1/min