Helicopter

A helicopter was an aircraft that used a rotating blade to achieve flight.

In 1986, Hikaru Sulu flew a Huey 204 helicopter owned by Plexicorp in order to deliver sheets of transparent aluminum to the HMS which was parked and cloaked in Golden Gate Park. As the aluminum was lowered into the ship it seemed to disappear and a person saw it and later reported it to the papers. (, SS TOS (Whales Weep Not))