A twin-engine prototype variant of the HH-43B developed in 1962, with a cabin capacity of 8-14 passengers. Several sources list the equipped powerplants of a later version being replaced by PT6 engines.
Design authority: Kaman Aircraft Corporation
Primary manufacturer: Kaman Aircraft Corporation
Parent type: Kaman K-600/H-43
Aircraft status: No longer flying
VTOL type: Helicopter
Lift devices: 2 in Synchropter configuration
Crew required: 2 in Side-by-side arrangement
Landing gear: Other