Produced beginning in 1958, the HH-43B (USAF designation) is a modification of the HH-43A. A smaller turboshaft is used and installed above the fuselage, rather than an internal piston engine; as a result, the cabin capacity is upgraded from 4-5 up to ten passengers when compared to its predecessor. The HH-43B was the first Kaman helicopter to be fitted with composite main rotor blades, instead of solid spruce like all those previous.
Beginning in 1961, an H-43B set several records:
Source: "Kaman Aerospace Corporation: Evolution of the Helicopter", R.H. Jones, Vertiflite, May/June 1984, Published by AHS International, Page 30.
Source: "The American Helicopter", Hirschberg, Michael, 2000, Page 59.
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: Wheels (non-retractable)