Supermarine S.5

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S.5
Schneider Trophy at Venice-1927.jpg
The first S.5 (N219) at Calshot during preparations for the 1929 Schneider Trophy Contest
RoleRacing seaplane
National originUnited Kingdom
Manufacturer Supermarine
Designer Reginald Mitchell
First flight7 June 1927
Introduction 1927
Primary user Royal Air Force High Speed Flight
Number built3
Developed from Supermarine S.4

The Supermarine S.5 was a 1920s British single-engined single-seat racing seaplane built by Supermarine. Designed specifically for the Schneider Trophy competition, the S.5 was the progenitor of a line of racing aircraft that ultimately led to the Supermarine Spitfire fighter.

Contents

Design and development

The Supermarine S.5 was designed by Reginald Mitchell for the 1927 Schneider Trophy. Following the earlier loss of the S.4 before the 1925 Schneider Trophy event Mitchell designed a new monoplane racer. Unlike the S.4's all-wood structure, the S.5 was of mixed construction with the semi-monocoque fuselage, including the engine cowlings, mainly duralumin; the wire-braced wings had spruce spars and spruce-ply ribs and a plywood skin. The horizontal tail surfaces were made of wood. Wing surface radiators made up of corrugated copper sheets replaced the Lamblin type radiators of the S.4.: oil was cooled by corrugated steel radiators on either side of the fuselage. The entire fuel load was carried in the starboard float, which was 8 inches (20 cm) closer to the aircraft's centreline than the port float. [1] Three aircraft were built, one with a direct drive 900 hp (670 kW) Napier Lion VIIA engine, and the other two with a geared 875 hp (652 kW) Napier Lion VIIB engine. [2]

Operational history

The first aircraft flew for the first time on 7 June 1927. The S.5s came 1st and 2nd in the 1927 race held at Venice; the winning aircraft (Serial number N220) was flown by Flight Lieutenant Sidney Webster at an average speed of 281.66 mph (453.29 km/h). [3]

One S.5, N221, crashed on 12 March 1928 during an attempt on the world air speed record, killing the pilot Flight Lieutenant Samuel Kinkead, who had flown the Gloster IV in the 1927 Schneider Trophy Race. [3]

Concern over the unreliability of the supercharged Lion powering the Gloster VI led to the High Speed Flight entering one S.5 (N219, fitted with a geared Lion engine for the event) along with the two S.6s for the 1929 Schneider contest. The S.5, flown by Flight Lieutenant D'Arcy Greig finished third in 46 minutes 15 seconds at a speed of 282.11 mph (454.01 km/h), behind the winning S.6 flown by Flying Officer H. Richard Waghorn and a Macchi M.52. [4]

Replica

Ray Hilborne of Leisure Sports designed and built a full-scale S.5 replica which flew for the first time on 28 August 1975. The replica, powered by a Continental IO-360, used an all-wood construction and incorporated modifications to the wing to lower the stalling speed, water rudders, a slightly wider cockpit and overall weight reduction to an all-up weight of just 1,500 lb (680 kg), less than half that of the S.5. [5]

In the song "Bill Hosie" by Archie Fisher, the protagonist rebuilds an S.5 Supermarine that survived the 1927 Schneider Trophy Race. The aircraft, race, and trophy are referred to throughout the song.

Operators

Flag of the United Kingdom.svg  United Kingdom

Specifications (N220)

Data from Supermarine Aircraft since 1914 [6]

General characteristics

Performance

See also

Related development

Related lists

Related Research Articles

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References

Notes
  1. Lewis, P: British Racing and Record-Breaking Aircraft. London 1970, Putnam ISBN 0 37000067 6, P.175
  2. Lumsden and Heffernan 1989, p. 290.
  3. 1 2 Andrews and Morgan 1987, p.186.
  4. Andrews and Morgan 1987, pp. 192–193.
  5. Hall 1976, p. 576.
  6. Andrews and Morgan 1987, p. 203.
  7. Lednicer, David. "The Incomplete Guide to Airfoil Usage". m-selig.ae.illinois.edu. Retrieved 16 April 2019.
Bibliography