AP 118 · No. 10 Section II · Aircraft 1942

Aircraft hub · 1942 · Second World War

Sikorsky R-4 Hoverfly

The first production helicopter in the world — and the gazetteer’s rotary story starts here. The gazetteer currently lists it at 2 UK museums.

1942
First flight
131
Built
75 mph
Top speed
2
Museums

Last verified 2026-10-11 against the gazetteer Compendium. Airframes move — confirm on museum pages before travel.

On charge

Where to see the Sikorsky R-4 Hoverfly in the UK

The gazetteer records 1 Sikorsky R-4 Hoverfly airframe (including cockpit sections and replicas where noted) across 2 UK collections, in 2 regions: London & Around, Northern England.

MuseumCityRegionAirframes recorded
Hooton Park HangarsChecked 2026-10-08 Ellesmere Port Northern England Sikorsky R-4B Hoverfly I KL110
Royal Air Force Museum LondonChecked 2026-10-08 London London & Around —

3D model

The Hoverfly I (R-4B) in 3D

A procedural model built in Blender from the type’s published dimensions, painted as ‘KK995’, the RAF Museum’s Sikorsky Hoverfly I, which the museum’s own history identifies as KL110, built as R-4B 43-46596 and assembled at Hooton Park in February 1945, flown by the Helicopter Training Flight at Andover, the Transport Command Development Unit and on the King’s Flight mail runs at Balmoral, then by 705 Squadron of the Royal Navy and the College of Aeronautics at Cranfield, presented to the museum in 1966 and refurbished at Bicester in 1967–68 with parts of KK995, whose identity it has carried ever since: the first helicopter in quantity production and the first in RAF and Royal Navy service, a two-seat trainer and liaison helicopter with a 38 ft three-blade fabric-covered main rotor, a Warner R-550 Super Scarab radial buried behind the side-by-side glazed cabin, a long tapering tail boom ending in an open truss that carries a three-blade anti-torque rotor on the starboard side, and fixed main wheels on splayed struts with a tail wheel under the boom, shown standing level with the blades parked and drooping: olive drab upper surfaces and sides over light blue-grey undersides, a white ‘E’ on each side behind the cabin and a smaller one on the band across the nose, Type C1 roundels on the tail boom with ‘KK995’ in black behind them, yellow and black hazard stripes round both cabin doors, grey main blades and black tail rotor blades with yellow tips. Drag to orbit, scroll or pinch to zoom · all 215 models · download .glb (976 KB) · Plate 103 in The Hangar

Computed from the survey

Collection context

Types you’ll see alongside

Avro Anson, de Havilland Canada Chipmunk, de Havilland Vampire, English Electric Canberra, Gloster Meteor.

Rarity on charge

One of only 1 in UK public collections.

Where the type is thickest

London & Around has 1 collection recording the type.

Type notes

The Sikorsky R-4 Hoverfly in brief

TypeSikorsky R-4 Hoverfly
UK museums holding one2
Airframes recorded in this survey1

Serials are the gazetteer's survey snapshot of what each collection records on charge — restorations move between workshops and reserve hangars, so check the museum page for opening times and current display status before travelling. Every type across 119 museums is indexed in the Compendium.

Aircraft questions

Frequently asked

How many Sikorsky R-4 Hoverfly airframes are left in the UK?

The Aviation Gazetteer records 1 Sikorsky R-4 Hoverfly airframe in UK collections.

Which museum has the most Sikorsky R-4 Hoverfly airframes?

Hooton Park Hangars has the most in this survey, with 1 recorded airframe.