The scientists created a pneumatic drive system consisting of two 40-liter compressed air tanks that are connected to a 6-hp "air motor," which is in turn coupled to a propeller via a steel shaft.

Rodless pneumatic cylinders are desirable where ... from vibration and compensate for slight shaft misalignment. Step-motor drives. In response to input signal pulses from the controller, the ...

The entry-level Air Pure features a single electric motor driving the rear wheels and produces 430 horsepower. Other models have dual electric motors that provide all-wheel drive and a variety of ...