The ADI Sportster is a two-seat gyroplane that has been marketed in plans form for homebuilding since 1974 by Aircraft Designs Inc. It was the first homebuilt gyrocopter design to be able to carry a passenger. The design first flew in 1974 and is built from bolted and riveted dural aluminium sheet. The rotor blades use an NACA 8H12 airfoil Specifications References Homebuilt aircraft 1970s United States sport aircraft Single-engined pusher autogyros Sportster Aircraft first flown in 1974