The Merlin features a single main rotor, a single-seat open cockpit with a
fairing and a windshield,
tricycle landing gear with
wheel pants and a twin cylinder, air-cooled,
two-stroke, single-ignition
Rotax 582 engine in
pusher configuration. The aircraft
fuselage is made from bolted-together square
aluminum tubing. Its diameter Rotor Flight Dynamics rotor has a chord of . The aircraft has an empty weight of and a gross weight of , giving a useful load of . After taking over Montgomery's design, company owner Gary Layzell expressed an interest in further developing the Merlin, but initially produced it unchanged. ==Operational history==