Developed in 1952, the Kaman K-600 is a larger and more powerful version of the HTK-1.  The cabin has a capacity of 5 passengers, including the crew.  The U.S. Air Force designated it the H-43A (now known as HH-43A), equipping it for firefighting with a 1000 lb (450 kg) fire fighting kit and small skis [1].  Designation under the U.S. Marines is HOK-1 (now the OH-43D); under the U.S. Navy, it is HUK-1 (redesignated UH-43C).  The H-43 went into service in April 1958 and was the primary helicopter for firefighting and short range rescue during the Vietnam War [2,3].


Source 1:  Alex, Ralph P. "Helicopters from 'A to Z', Part III". American Helicopter Society Newsletter, Vol. 7, 1961. Page 4-5.

Source 2:  Moorman, Robert W. "Coming Full Circle". Vertiflite July/August 2015. Published by AHS International. Page 19.

Source 3:  Hirschberg, Michael. "The American Helicopter" (2000). Page 58.


Data on design, manufacture and status

Design authority: Kaman Aircraft Corporation

Primary manufacturer: Kaman Aircraft Corporation

Parent type: Kaman K-600/H-43

Aircraft status: No longer flying


Primary flight and mechanical characteristics

VTOL type: Helicopter

Lift configuration: Synchropter (x2)

Crew required: 2

Crew seating: Side-by-side

Landing gear: Wheels (non-retractable)

Overall Dimensions

Data on aircraft size

Overall Height: 4.74 m (15.5 ft)

Overall Length: 14.33 m (47.0 ft)

Engine Details

Aircraft powerplant (lift and/or propulsion)

Total number of engines: 1

Engine designation: P&W R-1340-48 Wasp reciprocating

Engine manufacturer: Pratt & Whitney

Take-off / rated power: 448 kW (600 hp)

Weights and Performance

Data on aircraft weight and flight characteristics

Max Gross Weight (ground): 3084 kg (6800 lb)

Max Range: 354 km (191 nm)

Related VFS Resources

Resources related to the HH-43A , provided by the Vertical Flight Society.
Forum Proceedings
Vertiflite articles
Enter a search term in the box above.
Web files from
Enter a search term in the box above.
Webpages from
Enter a search term in the box above.

Related Public Resources

Resources related to the HH-43A , provided by public sources across the internet.