Vertipedia - Kaman HOK-1/OH-43D

The HOK-1 was the USMC version of the Kaman K-600. Developed in 1952. The cabin has a capacity of 5 passengers, including the crew. The designation to OH-43D was made as part of the 1962 change in designations for US military aircraft.

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.

Overview

Data on design, manufacture and status

Design authority: Kaman Aircraft Corporation

Primary manufacturer: Kaman Aircraft Corporation

Parent type: No type defined

Aircraft status: No longer flying

Configuration

Primary flight and mechanical characteristics

VTOL type: Helicopter

Lift devices: 2 in Synchropter configuration

Crew required: 1 in Side-by-side arrangement

Landing gear: Wheels (non-retractable)

Key Characteristics

Data on key physical features

Aircraft Details

Data on aircraft configuration, weights, flight performance and equipment

Layout and Dimensions

Weights and Performance

Engine Details

Primary Lift Device

Overall Dimensions
Overall Height:	4.74 m	15.5 ft
Overall Length:	14.33 m	47.0 ft
Overall Width:

Airframe Dimensions
Airframe Length:	7.62 m	25.0 ft
Airframe Width:	2.77 m	9.1 ft
Airframe Height:	3.81 m	12.5 ft

Landing Gear Dimensions
Landing Gear Base:
Landing Gear Track:

Cabin Dimensions
Cabin Internal Height:
Cabin Internal Length:
Cabin Internal Width:

Cruise Speed: 75 mph (121 km/h)

Weights
Max Gross Weight (ground):	3,084 kg	6,800 lb
Max Gross Weight (airborne):
Max Take-off Weight:	3,084 kg	6,800 lb
Empty Weight:	1,833 kg	4,040 lb
Useful Load:	1,252 kg	2,760 lb
Empty Weight Fraction:	0.594

Climb Performance
Max Rate of Climb:	7 m/s	1,300 fpm

Hover Performance
Hover Ceiling IGE:	3,658 m	12,000 ft
Hover Ceiling OGE:

Limitations
Max Level Flight Speed:	167 km/h	90 kts
Never Exceed Speed:
Service Ceiling:	5,486 m	18,000 ft

Range and Endurance
Max Range:	354 km	191 nm
Max Endurance:

Provided powerplant data is for uninstalled, sea level, static operations.

Powerplant
Number of engines:	1
Designation:	P&W R-1340-48 Wasp reciprocating
Manufacturer:	Pratt & Whitney

Normal Ratings
Max continuous:
Take-off / rated:	448 kW	600 hp
Intermediate:
Maximum:

OEI Ratings
OEI contingency:
OEI continuous:
OEI 30-second:
OEI intermediate:

Main Rotor Characteristics
Diameter:	14.33 m	47.00 ft
RPM:
Direction of Rotation:	Counter-rotating
Hub Type:

Main Rotor Blade Characteristics
Blade Construction:	Solid Wood
Blade Chord:
Blade Tip Geometry:
Blade Twist:
Number of Blades:	2

Main Rotor Derived Characteristics
Disc Area:	161.18 m²	1735.0 ft²
Disc Loading:	9.57 kg/m²	1.960 lb/ft²
Solidity:

Main Rotor Blade Derived Characteristics
Blade area per blade:
Tip Speed:

Tail Rotor Characteristics
Diameter:
Configuration:	Unknown
Direction of Rotation:	Unknown
RPM:

Tail Rotor Blade Characteristics
Number of Blades:
Blade Construction:	N/A
Blade Chord:
Blade Twist:

Tail Rotor Derived Characteristics
Disc Area:
Solidity:

Tail Rotor Blade Derived Characteristics
Tip Speed:
Blade Area (per blade):

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Images

Overview

Attribution

Number of engines:	1 Reciprocating
Max Level Flight Speed:	167 km/h	90 kts
Max Range:	354 km	191 nm
Max Endurance:

Main Rotor Diameter:	14.33 m	47.00 ft
Max Gross Weight (ground):	3,084 kg	6,800 lb
Useful Load (calculated):	1,252 kg	2,760 lb