The Fiat A.82 was an air cooledradial engine with 18 cylinders developed by the Italian engineering company Fiat and produced in small numbers during World War II. It was one of the most powerful aircraft engines produced in Italy and the culmination of series of successively larger engines developed from the A.74. It was used as the power plant for one operational aircraft, the Fiat BR.20bis bomber.
First run in 1938, the A.82 was a more powerful development of the A.80, itself derived from the A.74, which powered the Breda Ba.65 and Fiat BR.20. It was claimed to be 50% more powerful than its antecedents and one of the most powerful engines produced by the country.[1] It was the largest Italian engine design of the time.[2]
The A.82 was an 18-cylinder radial, consisting of two rows of nine cylinders arranged in a double star with a triple throw crankcase made of aluminium alloy.[3] Each cylinder had the same bore as the A.40 at 140 mm (5.5 in) but an increased stroke of 170 mm (6.7 in). They had steel barrels and aluminium alloy heads. Fuel was mixed in a Zenith-Stromberg downdraught carburettor.[4]
The engine was produced in two versions, the RC.40 of 1,250 hp (932 kW) and the RC.42 of 1,400 hp (1,044 kW), and saw limited operational service.[5] In addition to the fifteen Fiat BR.20bis operated by the Regia Aeronautica, Fiat also used the engine to power design studies like their BR.26 torpedo bomber.[6][7]
VariantsEdit
A.82 R.C.40
With reduction gear and supercharger, rated altitude 4,000 m (13,000 ft).[8]
A.82 R.C.42
With reduction gear and supercharger, rated altitude 4,200 m (13,800 ft).[8]
Arena, Nino (1982). La Regia Aeronautica, 1939-1943: 1941: L'anno della riscossa [The Royal Air Force, 1939-1945] (in Italian). Rome: Stato maggiore aeronautica. OCLC 799491205.
"New Fiat aircraft engine". Automotive Industries. 76 (1): 31. 1 January 1938.
"Fiat A 82 RC 42 S Flugmotor" [Fiat A 82 RC 42 S Aircraft Engine]. Flugsport (in German) (16): 319–320. 1941.
Gunston, Bill (2006). World Encyclopedia of Aero Engines. Stroud: Sutton Publishing. ISBN0-7509-4479-X.
Masino, Giovanni (2011). "Fantasmi di aerei e motori Fiat dal 1935 al 1945 (prime parte)" [The ghosts of Fiat aircraft engines from 1935 to 1945]. Ali Antiche (in Italian) (106): 16–24.
Thompson, Jonathan (1963). Italian Civil and Military Aircraft, 1930–1945. Los Angeles: Aero Publishers. ISBN1-2584-4296-5.
Wilkinson, Paul Howard (1940). "Italian Air-Cooled Engines". Aviation. November: 72–73. Retrieved 12 June 2019.
Wilkinson, Paul Howard (1945). Aircraft Engines of the World. New York: Paul H. Wilkinson. OCLC 1161068557. Retrieved 12 June 2019.
September 02, 2023
fiat, cooled, radial, engine, with, cylinders, developed, italian, engineering, company, fiat, produced, small, numbers, during, world, most, powerful, aircraft, engines, produced, italy, culmination, series, successively, larger, engines, developed, from, use. The Fiat A 82 was an air cooled radial engine with 18 cylinders developed by the Italian engineering company Fiat and produced in small numbers during World War II It was one of the most powerful aircraft engines produced in Italy and the culmination of series of successively larger engines developed from the A 74 It was used as the power plant for one operational aircraft the Fiat BR 20bis bomber A 82Fiat A 82 R42Type Air cooled 18 cylinder radial aircraft engineNational origin ItalyManufacturer FiatFirst run 1938Major applications Fiat BR 20bisDeveloped from Fiat A 80 Contents 1 Design and development 2 Variants 3 Applications 4 Specifications R C 42 4 1 General characteristics 4 2 Components 4 3 Performance 5 See also 6 References 6 1 Citations 6 2 BibliographyDesign and development EditFirst run in 1938 the A 82 was a more powerful development of the A 80 itself derived from the A 74 which powered the Breda Ba 65 and Fiat BR 20 It was claimed to be 50 more powerful than its antecedents and one of the most powerful engines produced by the country 1 It was the largest Italian engine design of the time 2 The A 82 was an 18 cylinder radial consisting of two rows of nine cylinders arranged in a double star with a triple throw crankcase made of aluminium alloy 3 Each cylinder had the same bore as the A 40 at 140 mm 5 5 in but an increased stroke of 170 mm 6 7 in They had steel barrels and aluminium alloy heads Fuel was mixed in a Zenith Stromberg downdraught carburettor 4 The engine was produced in two versions the RC 40 of 1 250 hp 932 kW and the RC 42 of 1 400 hp 1 044 kW and saw limited operational service 5 In addition to the fifteen Fiat BR 20bis operated by the Regia Aeronautica Fiat also used the engine to power design studies like their BR 26 torpedo bomber 6 7 Variants EditA 82 R C 40 With reduction gear and supercharger rated altitude 4 000 m 13 000 ft 8 A 82 R C 42 With reduction gear and supercharger rated altitude 4 200 m 13 800 ft 8 Applications EditFiat BR 20bis R C 42 7 Specifications R C 42 EditData from Wilkinson 1945 4 General characteristics Type 18 cylinder two row air cooled radial engine Bore 140 mm 5 5 in Stroke 170 mm 6 7 in Displacement 47 1 L 2 874 in3 Length 1 500 mm 59 in Diameter 1 350 mm 53 in Height 1 000 mm 39 in Dry weight 870 kg 1 920 lb Garelli compressed air starterComponents Valvetrain Two valves per cylinder driven by pushrods Supercharger Single stage mechanical 8 65 1 Fuel type Gasoline Cooling system Air cooledPerformance Power output Take off 1 400 hp 1 044 kW at 2400 rpmNormal 1 250 hp 932 kW at 2300 rpm at 4 200 m 13 800 ft Cruise 950 hp 708 kW at 1900 rpm at 4 500 m 14 800 ft Compression ratio 6 5 1 Fuel consumption 0 48 lb hp hr 220 g kW hr Oil consumption 0 022 lb hp hr 10 g kW hr See also EditComparable engines Alfa Romeo 135 Bristol Hercules Nakajima Homare Piaggio P XXII Pratt amp Whitney R 2800 Double Wasp Tumansky M 90Related lists List of aircraft enginesReferences EditCitations Edit nbsp Wikimedia Commons has media related to Fiat A 82 Automotive Industries 1938 p 31 Wilkinson 1940 p 73 Flugsport 1941 p 319 a b Wilkinson 1945 p 293 Gunston 2006 p 63 Masino 2011 pp 22 23 a b Thompson 1963 p 142 a b Arena 1982 p 668 Bibliography Edit Arena Nino 1982 La Regia Aeronautica 1939 1943 1941 L anno della riscossa The Royal Air Force 1939 1945 in Italian Rome Stato maggiore aeronautica OCLC 799491205 New Fiat aircraft engine Automotive Industries 76 1 31 1 January 1938 Fiat A 82 RC 42 S Flugmotor Fiat A 82 RC 42 S Aircraft Engine Flugsport in German 16 319 320 1941 Gunston Bill 2006 World Encyclopedia of Aero Engines Stroud Sutton Publishing ISBN 0 7509 4479 X Masino Giovanni 2011 Fantasmi di aerei e motori Fiat dal 1935 al 1945 prime parte The ghosts of Fiat aircraft engines from 1935 to 1945 Ali Antiche in Italian 106 16 24 Thompson Jonathan 1963 Italian Civil and Military Aircraft 1930 1945 Los Angeles Aero Publishers ISBN 1 2584 4296 5 Wilkinson Paul Howard 1940 Italian Air Cooled Engines Aviation November 72 73 Retrieved 12 June 2019 Wilkinson Paul Howard 1945 Aircraft Engines of the World New York Paul H Wilkinson OCLC 1161068557 Retrieved 12 June 2019 Retrieved from https en wikipedia org w index php title Fiat A 82 amp oldid 1155946048, wikipedia, wiki, book, books, library,
