Developed in 1954 for the US Navy, the helicopter uses peroxide as fuel and is unique in that it is strapped onto the pilot.  Instead of an engine, the aircraft is powered by rockets on each end of the main rotor; pressurized Nitrogen would act as the catalyst for the Hydrogen Peroxide [Ref 316].  The purpose of its tail rotor is to provide addition steering control.

Overview

Data on design, manufacture and status

Design authority: Rotor-Craft Corporation

Primary manufacturer: Rotor-Craft Corporation

Parent type: No type defined

Aircraft status: No longer flying

Configuration

Primary flight and mechanical characteristics

VTOL type: Helicopter

Lift devices: 1 Single main rotor

Dedicated control device: 1 Tail rotor

Crew required: 1 in Single seater arrangement

Landing gear: Other

Key Characteristics

Data on key physical features

Aircraft Details

Data on aircraft configuration, weights, flight performance and equipment

References

References and sources used

Helicopters & Autogyros of the World
Paul Lambermont, Anthony Pirie
Cassell & Company Ltd., 1959 (page 367)
Book

S-47 | S-47/R-4 Helicopter
Vinny Devine
Sikorsky Archives | Product History, Sep 19, 2017 (page 12)
Website
Very thorugh description and details of the R-4 series helicopter

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