It's a single rotor unit, with a displacement of just 0.15 cubic inches (2.46 cubic centimeters)! The Toyan RS-S100, as it's called, weighs up to 0.57 lbs (254 g), and has a maximum output of 0.7 hp.

As per the info available, the 10-kg (22-lb) powerplant is derived from another of the company’s pieces of hardware, an ICE single-piston linear engine. Unlike that one though, this one can run ...

Apex seals in a Wankel rotary engine perform a similar function as piston rings in internal combustion piston engines. However, the weak link of the Wankel engine could lie with the apex seal.

LiquidPiston's pitch for its rotary engine is that gasoline engines are inefficient, diesel engines are big and heavy, and electric power/batteries weigh a lot compared to what they produce ...

The rotary engine is easily one of the most controversial automotive engines. There's a pretty interesting explanation for the brap-brap sound they make.

This engine is a follow-on to an earlier 3D printed air-powered Wankel rotary engine, and we’re looking forward to part two of the liquid piston series. Video after the break.

Cirrus has so far delivered “nearly 10,000” examples of the high-performance single engine piston aircraft since the SR-20 was introduced in 1999.