Rotary-engined ground vehicles

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Gnome built multi-row versions of their various engine types:
The Omega-Omega, a double-row 14-cylinder rotary with Omega cylinders, displaced 15.966 l (974.3 in³) and developed 120 hp at 1,200 rpm. Dry weight was 310 lb, or 2.58 lb/hp, diameter was 32.5" and length was 49.5".

The Gamma-Gamma, a double-row 14 cylinder rotary using Gamma cylinders, displaced 20.584 l (1,256.1 in³), was rated 130/140 hp at 1,200 rpm. Weight was 287 lb, diameter was 34.2" and length was 439.6".

The Sigma-Sigma, a double-row 14-cylinder rotary using Sigma cylinders, displaced 19.0 l (1,159.5 in³) and was rated 120 hp at 1,200 rpm. Weight was 298 lb, or 2.48 lb/hp, diameter was 34.2" and length was 49.8".

The Lambda-Lambda, a double-row 14-cylinder rotary using Lambda cylinders, displaced 23.67 l (1,444.4 in³) and was rated 160 hp at 1,200 rpm. It weighed 396 lb, or 2.46 lb/hp. Diameter was 36.7" and length was 49.8".

The Delta-Delta, a double-row 18-cylinder rotary using Delta cylinders, displaced 32.606 l (1,989.7 in³) and was rated 200 hp at 1,200 rpm. It weighed 540lb, or 2.7 lb/hp, had a 40.2" diameter and a 54.1" length.

Omega-OmegaYou cannot view this attachment.

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The Siemens-Halske Sh.III was a counter-rotating design in which the cylinders rotated in the opposite direction of the crankshaft. It also had a throttle.

Siemens-Halske Sh.III