Sikorsky R-4B/HNS-1/Hoverfly I
Developed by 1942, the production aircraft were designated R-4B by the U.S. Army Air Force; HNS-1 by the U.S. Navy (which may be fitted with landing floats) and Hoverfly I by the Royal Navy. The R-4B/HNS-1 was the first helicopter to enter service with the U.S. military and the first to be mass produced in the USA.
A video of the aircraft can be viewed on the AHS YouTube site below,
Source: "Sikorsky R-4B of the 2nd Aircraft Repair Unit (Floating)", Vertical Flight Society YouTube site, Published on 4 Mar 2012
Overview
Data on design, manufacture and statusDesign authority: Sikorsky Aircraft Division, United Aircraft and Transport Corporation
Primary manufacturer: Sikorsky Aircraft Division, United Aircraft and Transport Corporation
Parent type: Sikorsky S-47/R-4
Aircraft status: No longer flying
Configuration
Primary flight and mechanical characteristicsVTOL type: Helicopter
Lift devices: 1 Single main rotor
Dedicated control device: 1 Tail rotor
Crew required: 1-2 in Side-by-side arrangement
Landing gear: Wheels (non-retractable)
Key Characteristics
Data on key physical featuresAircraft Details
Data on aircraft configuration, weights, flight performance and equipmentReferences
References and sources usedCassell & Company Ltd., 1959 (page 377)
Book
Sikorsky Archives | Product History, Sep 19, 2017 (page 14)
Website
Very thorugh description and details of the R-4 series helicopter
