Developed in 1958, the Model 107 is an Amphibious transport prototype helicopter. Designated YHC-1A in the US Army, under which the helicopter made its first flight as a military aircraft in August 1959. Capable of operation in any weather condition, equipped with a Stability Augmentation System (SAS) device.
Source: Paul Lambermont with Anthony Pirie. Helicopters & Autogyros of the World. Cassell & Company, 1959. Pages 400-401.
VTOL type: Helicopter
Lift devices: 2 in Tandem (Fore/aft) configuration
Crew required: 2 in Side-by-side arrangement
Landing gear: Wheels (non-retractable)