Developed in 1949, the K-225 is the same as the Kaman K-190 except for engine and performance.  CAA certificated, 11 were produced with the primary use of crop dusting.  In March 1950, three K-225s were delivered to the United States Navy and Coast Guard for evaluation.  Of those delivered, the K-225 performed the first loop by a helicopter.  The Navy took the K-225 into service, modifying it under the designation of HTK-1. This version used a reciprating engine.

Source:  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: Kaman K-225

Aircraft status: No longer flying

Configuration

Primary flight and mechanical characteristics

VTOL type: Helicopter

Lift configuration: Synchropter (x2)

Crew required: 1

Crew seating: Single seater

Landing gear: Wheels (non-retractable)

Overall Dimensions

Data on aircraft size

Engine Details

Aircraft powerplant (lift and/or propulsion)

Total number of engines: 1

Engine designation: Lycoming O-435-A2 reciprocating

Engine manufacturer: Lycoming Engines

Take-off / rated power: 164 kW (220 hp)

Weights and Performance

Data on aircraft weight and flight characteristics

Max Gross Weight (ground): 1225 kg (2700 lb)

Max Range: 312 km (168 nm)

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