A three wheeled vehicle, sometimes equipped with two seats. To distinguish between PPC trikes and PPG trikes, PPG trikes are sometimes referred to as "carts".
a vehicle with three wheels that is moved by foot pedals
a hang glider-type of wing supporting a wheeled carriage for one or two people and an engine
an ultralight aircraft that is controlled by weight transfer
a three-wheeled ATV
Contrary to a backpack unit, a trike offers three wheels and an attached engine. You sit with your feet up. Trikes often offer larger engines and an additional seat. However! Ultralight flights, per FAA regulations do not permit passengers. Dual seat units are for instructional use only. Instructor ratings are available through the ASC.