LiquidPiston introduced the X Mini, a 70cc gasoline-powered rotary four-stroke engine prototype.
The engine has two primary moving parts, a 4-pound core and fits in a 6.6-inch by 6.2-inch by 5.4-inch box.
In testing, the engine produced 3.5 horsepower.
The machine is expected to weigh 3 pounds, produce more than 5 horsepower at up to 15,000 RPM and be more than 30 percent smaller and lighter.
The engine will be available for handheld power equipment, lawn and garden equipment, portable generators and more.
The engine is based on the company’s thermodynamic cycle and engine architecture.
In the first quarter of 2015, LiquidPiston will host an open call for ideas regarding the new applications that the X Mini could use.
The company will award a cash prize for the most innovative submission.