Here you will have an overview of the technical data of the three engines as a comparison.

14-cylinder double row radial engine

12-cylinder-V-engine

9-cylinder radial engine

	14-cylinder double row radial engine	12-cylinder-V-engine	9-cylinder radial engine
Bore	20 mm	21 mm	23 mm
Stroke	22 mm	21 mm	24 mm
Capacity	97 ccm	87 ccm	90 ccm
Weight approx.	4300 g	4800 g	4000 g
Revolutions approx.	900-4500 1/min.	950-4500 1/min.	950-5000 1/min.
Valve diameter	8,5 mm	8,5 mm	9,5 mm
Valve lap	60 degrees KW	20 degrees KW	28 degrees KW
Outer diameter approx.	235 mm	-	250 mm
Width approx.	-	145 mm	-
Height approx.	-	145 mm	-
Length approx.	195 mm	295 mm	140 mm
Propeller size up to approx.	28x10 inch	24x10 inch	26x12 inch