The H-21A is the general purpose version of the H-21 series, used in the U.S. Air Force. Ten to sixteen passengers can be accommodated.
Design authority: Piasecki Helicopter Corporation
Primary manufacturer: Piasecki Helicopter Corporation
Parent type: Piasecki H-21
Aircraft status: No longer flying
VTOL type: Helicopter
Lift devices: 2 in Tandem (Fore/aft) configuration
Crew required: 2 in Side-by-side arrangement
Landing gear: Wheels (non-retractable)