De_Havilland_Gipsy_Queen Knowpia

Gipsy Queen
	A de Havilland Gipsy Queen 30 at the de Havilland Aircraft Museum
Type	Piston inline aero engine
Manufacturer	de Havilland Engine Company
First run	1936
Major applications	de Havilland Dove ; de Havilland Dragon Rapide ; de Havilland Heron
Number built	c.5,000
Developed from	de Havilland Gipsy Six

The de Havilland Gipsy Queen is a British six-cylinder aero engine of 9.2 litres (560 cu in) capacity that was developed in 1936 by the de Havilland Engine Company. It was developed from the de Havilland Gipsy Six for military aircraft use.^[1] Produced between 1936 and 1950 Gipsy Queen engines still power vintage de Havilland aircraft types today.

Variants edit

Note:^[2]

Gipsy Queen I: (1936) 205 hp (153 kW), military version of Gipsy Six II. Splined crankshaft, but intended for fix-pitch airscrews fitted with an adapter. No fittings for a VP airscrew fitted. Very limited production.
Gipsy Queen II: (1936) 210 hp (160 kW), military version of the Gipsy Six Series II. Strengthened crankcase. Splined crankshaft for V/P airscrew.
Gipsy Queen III: (1940) 200 hp (150 kW), military version of Gipsy Six, strengthened crankcase, tapered crankshaft for fixed-pitch;-1,358 built. Most of these engines were fitted with a very basic top-cover, as per the early Gipsy-Six, with no accessory drives at the rear of the top-cover whatsoever.
Gipsy Queen IV: (1941) Supercharged version, originally designated Gipsy Queen IIIS, designated Gipsy Queen 50 in June 1944. Only a handful were made. This engine was widely advertised at the time, however, it never entered production, as it was superseded by the completely re-engineered Queen 30.

de Havilland Gipsy Queen 30 on display at the Fleet Air Arm Museum

Gipsy Queen 30; All-new engine from this point. (120 mm x 150 mm = 10.18 L)^[3]: (1946) 240 hp (180 kW), 1,762 built.
Gipsy Queen 30-2: (1946) 240 hp (180 kW).
Gipsy Queen 30-3: (1946) 240 hp (180 kW).
Gipsy Queen 30-4: (1946) 240 hp (180 kW).
Gipsy Queen 31: (1946) 205 hp (153 kW). ref=Flight ^[4]|
Gipsy Queen 32: (1946) 250 hp (190 kW).
Gipsy Queen 33: As Gipsy Queen 30 for pusher installation.
Gipsy Queen 34: As Gipsy Queen 30.
Gipsy Queen 50: (1944) 295 hp (220 kW), Single-speed, single stage supercharger. 14 built.
Gipsy Queen 51: 295 hp (220 kW), as Gipsy Queen 50.
Gipsy Queen 70-1: (1946) Renamed Gipsy Six S.G, 1,889 built. Supercharged with reduction-drive.
Gipsy Queen 70-2: 380 hp (280 kW)3. Supercharged with reduction-drive.
Gipsy Queen 70-3: 380 hp (280 kW). Supercharged with reduction-drive.
Gipsy Queen 70-4: 340 hp (250 kW). Supercharged with reduction-drive.
Gipsy Queen 71: (1950) 330 hp (250 kW). Supercharged with reduction-drive.
Gipsy Queen 136

UK Ministry of Defence designation of Gipsy Queen 30-2

Applications edit

Surviving engines edit

Of the 11 Gipsy Queen-powered de Havilland Doves on the British register, only two remain airworthy as of April 2011^[update].^[5]

A Gipsy Queen II powered 1936 Percival Mew Gull (G-AEXF) is owned and operated by The Shuttleworth Collection at Old Warden in the UK, and flies regularly at home, and limited away airshows, subject to serviceability.^[6]

Engines on display edit

A preserved de Havilland Gipsy Queen engine is on public display at the Royal Air Force Museum Cosford.^[7]

A de Havilland Gipsy Queen 30 in on display at the de Havilland Aircraft Museum.^{[citation needed]}

Specifications (Gipsy Queen I) edit

Data from Lumsden ^[8]

General characteristics

Type: 6-cylinder inverted inline piston engine
Bore: 4.646 in (118 mm)
Stroke: 5.512 in (140 mm)
Displacement: 560.6 cu in (9.186 L)
Length: 63.5 in (1,587 mm)
Width: 20.5 in (513 mm)
Height: 33.5 in (838 mm)
Dry weight: 486 lbs (220 kg)

Components

Valvetrain: Overhead valve
Fuel type: 87 octane petrol
Oil system: Dry sump
Cooling system: Air-cooled

Performance

Power output: 208 hp (155 kW) at 2,400 rpm
Compression ratio: 6.5:1
Power-to-weight ratio: 0.43 hp/lb (0.7 kW/kg)

References edit

Notes edit

^ Janes 1989, p. 275.
^ List from Lumsden 2003, pp. 145-146
^ Gunston 1999, pp. 139
^ "Cierva", Flight: 340, 17 April 1947
^ CAA G-INFO DH.104 Archived 6 June 2011 at the Wayback Machine www.caa.co.uk. Retrieved: 21 April 2011
^ Percival Mew Gull - Shuttleworth Retrieved 23 March 2017
^ de Havilland Gipsy Queen 175 - www.rafmuseum.org.uk Retrieved: 4 April 2021
^ Lumsden 2003, p.145.

Bibliography edit

Jane's Fighting Aircraft of World War II. London. Studio Editions Ltd, 1989. ISBN 0-517-67964-7
Lumsden, Alec. British Piston Engines and their Aircraft. Marlborough, Wiltshire: Airlife Publishing, 2003. ISBN 1-85310-294-6.
Gunston, Bill. Development of Piston Aero Engines. Patrick Stephens Limited, 1999. ISBN 978-1-85260-619-0.