The family includes at least three configurations selected from a single cylinder, V-type, inline, opposed, W-type, and radial configurations.

Project 150 : Proposed version powered by a Bristol Hercules radial piston engine.

Fleet Model 4 - version with Curtiss Challenger engine (1 built)

A piston engine designed as a motor with a star configuration has a rotary shaft arranged in the motor housing, upon which pistons linked to a piston rod are radially movable.

a complete overhaul check-up of a Boeing Stearman PT17 with standard star-engine exchange,

Originally powered by one 160 hp Shvetsov M-11FR-1 radial piston engine, it entered service in 1946.

Originally powered by one 119 kW Shvetsov M-11FR-1 radial piston engine, it entered service in 1946.

The initial aircraft (Ki-115a) were powered by 858 kW (1,150 hp) Nakajima Ha-35 radial engines.

Wright R-3350 Turbo-Compound radial engine fitted at the Number Four position on the starboard wing of a Lockheed Super Constellation

V.13/1 : First prototype, powered by a 108 kW (145 hp) Oberursel Ur.III rotary engine

V.13/2 : Second prototype, powered by a 119 kW (160 hp) Siemens-Halske Sh.III rotary engine

The current, which can also be stated on the plate, shows the lower value for the star connected motor and the higher for the delta connected motor.

The original Curtiss XP-40, ordered July 1937, was converted from the 10th P-36A by replacing the radial engine with a new Allison V-1710-19 engine.

The current, which can also be stated on the plate, shows the lower value for the star-connected motor and the higher for the delta-connected motor.

The original Curtis XP-40, ordered July 1937, was converted from the 10th P-36A by replacing the radial engine with a new Allison V-1710-19 engine.