The Lycoming XH-2470 was an H engine for aircraft designed and developed by Lycoming Engines in the 1930s. Although the engine was flown in an aircraft, it was not fitted to any aircraft selected for production. It was derived from the Lycoming O-1230 engine.
In 1932, the engineers at Lycoming Engines became aware that the United States Army Air Corps (USAAC) wanted a high-performance engine that could produce at least one horsepower per cubic inch (46 kW/L) of engine displacement.[1] Determined to become known as a high-performance engine manufacturer, Lycoming began an experimental, high-performance engine of its own. After spending US $500,000, and after many attempts to develop a successful engine, it finally came close to the USAAC specifications with the O-1230 engine, which was a 12-cylinder liquid-cooled horizontally opposed low-profile piston engine.[2] In 1936, the single-cylinder development tests exceeded expectations, passing its 50-hour test requirement. The full-size engine was ready for testing in 1937, and was rated at 1,000 hp. Continued development of the O-1230 reached its peak when the engine was rated at over 1,200 hp (895 kW). The O-1230 was not well received by aircraft manufacturers, because it was not very reliable at that power setting.[2]
It was apparent that the O-1230 engine was uncompetitive with the high-performance air-cooled engines that were then becoming available. The US Navy began funding the development of the Lycoming engine.[3] The funding enabled Lycoming's engineers to attempt rescuing the design by proposing a 24-cylinder H-configuration engine made by stacking two of the O-1230 engines, gearing them together to one common output shaft. The new engine was the H-2470. It weighed in at 2,430 pounds and produced 2,300 hp (1,700 kW) at 3,300 rpm.[2]
Operational history
The Navy specified the H-2470 for the Curtiss XF14C-1 experimental fighter.[2] After some rigorous testing the engine's poor performance led to the substitution, before the aircraft flew, of a Wright R-3350 radial engine, which was also having technical problems but was considered to be more reliable than the H-2470. The testing program was eventually terminated due to the poor performance of the aircraft.[4]
The USAAC was also interested in the H-2470, and installed and flew it in the Vultee XP-54 prototype fighter. The XP-54 was the only aircraft to actually use it for flight, but like the Navy's XF-14C, the XP-54 never went into production.[2]
White, Graham, Allied Aircraft Piston Engines of World War II, SAE International, 1995
Balzer, Gerald C., American Secret Pusher Fighters of World War II, Specialty Press. 2008
Wagner, Ray, American Combat Planes, Third Enlarged Edition, Doubleday, 1982.
Wegg, John, General Dynamics Aircraft and Their Predecessors, Naval Institute Press, 1990.
External links
XH-2470 in a test cell
This aircraft engine article is missing some (or all) of its specifications. If you have a source, you can help Wikipedia by adding them.
March 08, 2023
lycoming, 2470, engine, aircraft, designed, developed, lycoming, engines, 1930s, although, engine, flown, aircraft, fitted, aircraft, selected, production, derived, from, lycoming, 1230, engine, 2470type, enginenational, origin, united, statesmanufacturer, lyc. The Lycoming XH 2470 was an H engine for aircraft designed and developed by Lycoming Engines in the 1930s Although the engine was flown in an aircraft it was not fitted to any aircraft selected for production It was derived from the Lycoming O 1230 engine XH 2470Type H engineNational origin United StatesManufacturer Lycoming EnginesMajor applications Vultee XP 54Developed from Lycoming O 1230 Contents 1 Design and development 2 Operational history 3 Applications 3 1 Intended 4 Specifications 4 1 General characteristics 4 2 Components 4 3 Performance 5 See also 6 References 7 External linksDesign and development EditIn 1932 the engineers at Lycoming Engines became aware that the United States Army Air Corps USAAC wanted a high performance engine that could produce at least one horsepower per cubic inch 46 kW L of engine displacement 1 Determined to become known as a high performance engine manufacturer Lycoming began an experimental high performance engine of its own After spending US 500 000 and after many attempts to develop a successful engine it finally came close to the USAAC specifications with the O 1230 engine which was a 12 cylinder liquid cooled horizontally opposed low profile piston engine 2 In 1936 the single cylinder development tests exceeded expectations passing its 50 hour test requirement The full size engine was ready for testing in 1937 and was rated at 1 000 hp Continued development of the O 1230 reached its peak when the engine was rated at over 1 200 hp 895 kW The O 1230 was not well received by aircraft manufacturers because it was not very reliable at that power setting 2 It was apparent that the O 1230 engine was uncompetitive with the high performance air cooled engines that were then becoming available The US Navy began funding the development of the Lycoming engine 3 The funding enabled Lycoming s engineers to attempt rescuing the design by proposing a 24 cylinder H configuration engine made by stacking two of the O 1230 engines gearing them together to one common output shaft The new engine was the H 2470 It weighed in at 2 430 pounds and produced 2 300 hp 1 700 kW at 3 300 rpm 2 Operational history EditThe Navy specified the H 2470 for the Curtiss XF14C 1 experimental fighter 2 After some rigorous testing the engine s poor performance led to the substitution before the aircraft flew of a Wright R 3350 radial engine which was also having technical problems but was considered to be more reliable than the H 2470 The testing program was eventually terminated due to the poor performance of the aircraft 4 The USAAC was also interested in the H 2470 and installed and flew it in the Vultee XP 54 prototype fighter The XP 54 was the only aircraft to actually use it for flight but like the Navy s XF 14C the XP 54 never went into production 2 Applications EditVultee XP 54Intended Edit Curtiss XF14C Northrop N 1Specifications EditGeneral characteristics Type 24 cylinder H piston engine Bore 5 25 in 133 35 mm Stroke 4 75 in 120 65 mm Displacement 2467 8 cu in 40 44 L Dry weight 2 430 lb 1 102 kg Components Cooling system Liquid cooledPerformance Power output 2 300 hp at 3 300 rpmSee also EditComparable engines Fairey P 24 Napier SabreRelated lists List of aircraft enginesReferences Edit White p 379 a b c d e White p 380 Balzer p 24 White p 381 White Graham Allied Aircraft Piston Engines of World War II SAE International 1995 Balzer Gerald C American Secret Pusher Fighters of World War II Specialty Press 2008 Wagner Ray American Combat Planes Third Enlarged Edition Doubleday 1982 Wegg John General Dynamics Aircraft and Their Predecessors Naval Institute Press 1990 External links EditXH 2470 in a test cell This aircraft engine article is missing some or all of its specifications If you have a source you can help Wikipedia by adding them Retrieved from https en wikipedia org w index php title Lycoming XH 2470 amp oldid 1056215880, wikipedia, wiki, book, books, library,
