Quadcopters tend to have very poor efficency because of their high disk loading. High disk loading– that is, how much weight ...

Cirrus SR20 and SR22 aircraft feature a combined "power lever" that integrates both throttle and propeller controls to simplify operation and reduce pilot workload. This mechanical system uses a cam ...

Hartzell Propeller has developed a new two-bladed Top Prop propeller conversion kit for the Piper PA-23-250 Aztec. The 77-in.-dia. propeller uses blade-mounted counterweights to provide redundant ...

Maintenance on a wind turbine hub can be exciting, but also somewhat dangerous and a bit exhausting, as all the equipment and tools must be carried up (and down) hundreds of feet. Making pitch ...