J Perkins Roto 85 Fs 4-Stroke Petrol Engine (85Cc)

Roto Motor

Roto Motors are manufactured by one of the leading model engine company from the Czech Republic. No expense has been spared with any of the materials and components used to produce this range of quality high performance petrol engines.Roto Motors use a Rotary Valve Induction system to aid easy starting and smooth consistent linier performance with a slow idle speed. One of the only petrol engine manufactures to use conventional model type engine mounting system on the 25, 35 and 35fs size engines. This allows easy installation into most aircraft. Fully shielded electronic ignition system insures no interference with your transmitter signal.

Manufacturing Technology

Crank case

The engine case is rough cast Aluminium then CNC finished to the highest tolerances finished with a strong heatproof powder coating.

Cylinder sleeve

Manufactured from one piece of dural with pressed insole from the mild-granular cast iron. It is then shaped and honed to the correct size.

Piston

The Pistons are cast from high quality Silicon Alloy and machined to a high tolerance.

Crankshaft

The Crankshaft is hade from one piece of high grade steel machined then hardened.All components are carefully cleaned and scanned to verify they comply with the strict tolerances Roto Motors demand.

Specification

• DISPLACEMENT 85 cc
• BORE 39.5 mm
• WEIGHT 2790 g
• PISTON ROD 4 x NEEDLE BEARING TORRINGTON
• CRANK SHAFT 3x BALL BEARING
• Ignition: 4.8—6v
• Fuel/Oil MOTUL 710 40:1
• RPMrpm 1200 - 6000 with propeller 25-27"

• C.C. - 85.0
• HP - 5.5
• Ignition - Electronic Processor Controlled
• Prop Size - 25-27 inch
• RPM - 1200-6000 (25x10 Prop)
• Static Thrust - 14.0kg
• Type - 85cc Petrol
• Weight - 2790g