Developed in 1958, the helicopter is powered by three turbo-compressors; the tip-jet aircraft can operate on two of its three engines, which can function independently.  The XV-1 Convertiplane rotor was used for the Model 120.  To steer, the engine exhaust was used [Ref Hirschberg. The American Helicopter. Page 62].

Overview

Data on design, manufacture and status

Design authority: McDonnell Aircraft Corporation

Primary manufacturer: McDonnell Aircraft Corporation

Parent type: No type defined

Aircraft status: No longer flying

Configuration

Primary flight and mechanical characteristics

VTOL type: Helicopter

Lift configuration: Single main rotor

Crew required: 1

Crew seating: Single seater

Landing gear: Skids

Overall Dimensions

Data on aircraft size

Overall Height: 2.74 m (9.0 ft)

Overall Length: 9.45 m (31.0 ft)

Overall Width: 9.45 m (31.0 ft)

Engine Details

Aircraft powerplant (lift and/or propulsion)

Total number of engines: 3

Engine designation: AiResearch GTC-85-35 turbine

Engine manufacturer: AiResearch

Take-off / rated power: 63 kW (85 hp)

Weights and Performance

Data on aircraft weight and flight characteristics

Max Gross Weight (ground): 2858 kg (6300 lb)

Max Range: 158 km (85 nm)

Max Endurance: 1.2 hrs (1.2 hrs)

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