ADC Cirrus or Cirrus-Hermes is a British air-cooled piston aircraft engine designed and manufactured by ADC Aircraft since the mid-1920s. Also referred to as Blackburn Cirrus , [1]
| ADC Cirrus | |
|---|---|
 | |
| Manufacturer | Aircraft Disposal Company Cirrus Aero-Engines Limited |
| Years of production | 1925- |
| Specifications | |
| Volume | 4,5 l |
| Power | 60 h.p. |
| Compression ratio | 4.7: 1 |
| Bore | 105 mm |
| Piston stroke | 130 mm |
| Number of cylinders | four |
| Valves | One inlet and outlet valve per cylinder |
| Fuel system | Carburetor Claudel-Hobson |
| Fuel type | gasoline with an octane rating of at least 70 |
| Cooling system | aerial |
| Dimensions | |
| Length | 1163 mm |
| Width | 464 mm |
| Height | 7871 mm |
Content
History
ADC Aircraft manufactured aircraft engines under the brand name ADC Cirrus until the formation of Cirrus Aero Engines Limited in 1927. Later, in 1931, it was acquired by the Cirrus-Hermes Engineering Company and became known as Cirrus-Hermes . Then it became a part of Blackburn & General Aircraft Limited as its engine building department (1934) and existed in this form until after the Second World War . [2]
The first Cirrus engine was the 90-horsepower (67 kW) Cirrus I, certified after 50 hours of testing in 1925. This model, developed by Frank Halford, was widely used in light aircraft . Its scheme (in which one cylinder block from the V-shaped ADC Airdisco was used ) [3] was actively copied by other manufacturers. Subsequent modifications, Cirrus II and Cirrus III had a slightly larger displacement and power (Cirrus II - 85 hp, Cirrus III - 90 hp).
Even more powerful were the engines of the new model range, Cirrus-Hermes I, II, and IV: from 105 to 140 hp. Some later modifications of Cirrus had an inverted design. [four]
The Cirrus III engine was also manufactured in the United States by American Cirrus Engines Inc., (Belleville, NJ) (later ACE Corp, Marysville, MI).
Modifications
- Cirrus i
- (1925)
- Cirrus ii
- (1926)
- Cirrus iii
- (1929)
- Cirrus iiia
- (1933)
- Cirrus-hermes i
- (1929)
- Cirrus-hermes ii
- (1930)
- Cirrus-hermes iib
- (1931) inverted
- Cirrus-hermes iv
- (1930)
- Cirrus-hermes iva
- (1929) inverted
- American cirrus iii
- American Cirrus III Hi-drive
Application
Information for: Lumsden . [5] [6]
Cirrus
Cirrus I
- Avro avian
- Avro Baby
- de Havilland DH.60 Moth
- Short mussel
- Westland widgeon
Cirrus II
- Avro avian
- de Havilland DH.60 Moth
- de Havilland DH.71 Tiger Moth
- Piaggio P.9
- Short mussel
- Westland widgeon
- Bloudek xv lojze
Cirrus III
- Avro avian
- Blackburn bluebird
- Cierva c.17
- de Havilland DH.60 Moth
- de Havilland DH.71 Tiger Moth
- Dudley Watt DW2
- Emsco B-4 Cirrus
- Koolhoven FK.41 [7]
- Klemm L.26
- Klemm L. 27
- Short mussel
- Simmonds spartan
- Spartan arrow
- Westland wessex
- Westland widgeon
Cirrus IIIA
- Miles M.2 Hawk
Cirrus-Hermes
Cirrus-Hermes I
- Avro avian
- Blackburn bluebird
- de Havilland DH.60 Moth
- Desoutter i
- Koolhoven FK.41 [8]
- Koolhoven FK.42 [9]
- Hawker tomtit
- Hendy 302
- Parnall elf
- Saro cutty sark
- Simmonds spartan
- Southern martlet
- Westland wessex
- Westland widgeon
Cirrus-Hermes II
- Avro avian
- Blackburn bluebird
- Desoutter i
- Spartan arrow
- Spartan three-seater
- Westland widgeon
Cirrus-Hermes IIB
- Arrow active
- BFW M.23
- Klemm L. 27
- Koolhoven FK44 [10]
- Koolhoven FK45 [11]
- Spartan three-seater
Cirrus-Hermes IV
- Avro cadet
- Hendy 302
- Miles M.2 Hawk
- Percival gull
- Roe IV Triplane replica
- Spartan cruiser
- Spartan three-seater
Cirrus-Hermes IVA
- Avro Club Cadet
- Blackburn b-2
- Blackburn segrave
Museum Exposure Engine
- Museum of Science in London (ADC Cirrus II).
- EAA AirVenture Museum in Oshkosh , Wisconsin (Cirrus Hermes).
See also
- Blackburn cirrus minor
- Blackburn cirrus major
Comparable engines
- de Havilland Gipsy
- List of aircraft engines
Notes
- ↑ This designation only applies to Cirrus engines manufactured after 1934 by Blackburn, such as the Blackburn Cirrus Major .
- ↑ Lumsden 2003, p. 130.
- ↑ Gunston 1989, p. 40.
- ↑ Lumsden 2003, p. 132.
- ↑ Lumsden 2003, pp. 130-132.
- ↑ These Cirrus engines may not be the main powerplant option, but including installed in an experimental manner.
- ↑ Jackson p. 190 1973
- ↑ Jackson p. 495 1973
- ↑ Les Ailes 469, p.3 1930
- ↑ Wesselink 1982 p.80
- ↑ Wesselink 1982 p.81
Sources
- Gunston, Bill. World Encyclopaedia of Aero Engines . Cambridge, England. Patrick Stephens Limited, 1989. ISBN 1-85260-163-9
- Lumsden, Alec. British Piston Engines and their Aircraft . Marlborough, Wiltshire: Airlife Publishing, 2003. ISBN 1-85310-294-6 .
- Jackson, AJ British Civil Aircraft 1919-72. - London: Putnam Publishing, 1973. - Vol. 2.- ISBN 0 85177 813 5 .
- Frachet, André. Le monoplan Koolhoven FK42 (neopr.) // Les Ailes. - 1930. - 12 June ( No. 469 ). - S. 3 .
- Wesselink, Theo. De Nederlandse vliegtuigen / Theo Wesselink, Thijs Postma. - Haarlem: Romem, 1982. - ISBN 90 228 3792 0 .
- Alan Bransom, The Tiger Moth Story, Shrewsbury, UK, Airlife Publishing Ltd., 1991, ISBN 1-85310-294-6 .
- Theo Wesselink, Thijs Postma, De Nederlandse vliegtuigen, Haarlem, Romem, 1982, ISBN 90-228-3792-0 .