The radial engine is a reciprocating type internal combustion engine configuration in which the cylinders point outward from a central crankshaft like the spokes on a wheel. This configuration was very commonly used in aircraft engines before being superseded by turboshaft and turbojet engines.

The Radial Chopper, with its Rotec 2800cc 110hp aircraft engine, turned heads at the Oshkosh Air Show

The Rotec R2800 is comprehensive and yet conservative by design, and has many desirable features and specifications:

* Total swept volume of 2800cc (172ci). 110HP @ 3700 RPM geared. Total engine diameter is 810mm (31.9").

* Dry Weight without any Acc's (no Starter Motor, Alternator or Carb) = 95 Kg

* Dry Weight with Acc's (Starter Motor + Alternator + Carb) = 102 Kg

* Gearing is via a PSRU (Planetary Speed Reduction Unit) at a ratio of 3:2 Engine rpm:Prop rpm.