The RPM of an aircraft's engine determines its power and speed, with higher RPMs generally indicating more power. General ...

Especially if the airplane has a motor, this has a huge potential impact on weight. For this reason, [gzumwalt] embarked on his own self-imposed challenge to build an engine with the smallest ...

His latest effort is capable of running at up to 4,500 RPM, and delivering a full 0.05 horsepower. Two-cylinder power! [Tom’s] ultimate goal is to put his new tiny air engine on a small model ...

The plane's owner, who is identified only as Jonathan, installed a 1.54:1 gear reduction unit to slow the propeller to a workable velocity and capped the engine's maximum speed at 4,200 RPM.

At a time when engineers thought it wise to bolt airplane engines into ... four-cylinder engine producing 200 hp. It revved to 1,650 rpm, and the fuel pump was a pneumatic hand pump design ...