The Curtiss V-1570 Conqueror was a 12-cylinder vee liquid-cooled aircraft engine. Representing a more powerful version of the

Curtiss D-12 The Curtiss D-12, sometimes identified with the military designation Curtiss V-1150, was an aircraft engine of 18.8 liter displacement. It was a water-cooled V12, producing 443 hp (330 kW) and weighing 693 lb (314 kg). It wa ...

, the engine entered production in

1926 Events January * January 3 – Theodoros Pangalos (general), Theodoros Pangalos declares himself dictator in Greece. * January 8 **Abdul-Aziz ibn Saud is crowned King of Kingdom of Hejaz, Hejaz. ** Bảo Đại, Crown Prince Nguyễn P ...

and flew in numerous aircraft.Gunston 1989, p. 46.

Design and development

Designed in 1924 as a military successor to the

, initially named the Conqueror, it was later given the military designation of V-1570 based on its

displacement Displacement may refer to: Physical sciences Mathematics and Physics *Displacement (geometry), is the difference between the final and initial position of a point trajectory (for instance, the center of mass of a moving object). The actual path ...

of 1,570 cubic inches (26 L). The engine featured open-ended cylinder liners (advanced technology for the period) and pressurized

liquid cooling Liquid cooling refers to cooling by means of the convection or circulation of a liquid. Examples of liquid cooling technologies include: * Cooling by convection or circulation of coolant, including water cooling * Liquid cooling and ventilat ...

. Developments including the use of a

supercharger In an internal combustion engine, a supercharger compresses the intake gas, forcing more air into the engine in order to produce more power for a given displacement. The current categorisation is that a supercharger is a form of forced indu ...

gradually increased power output until reliability problems due to overheating and coolant leaks became apparent. Military funding for further development of the Conqueror was cut in 1932, efforts by Curtiss to market the engine for civil

airliner An airliner is a type of aircraft for transporting passengers and air cargo. Such aircraft are most often operated by airlines. Although the definition of an airliner can vary from country to country, an airliner is typically defined as an ...

s failed and the line was dropped from production.

Variants

;V-1570-1 ;V-1570-5 ;V-1570-7 ;GV-1570-7: geared -7 ;V-1570-9 ;V-1570-11 ;V-1570-13 ;V-1570-15 ;SV-1570-15 ;V-1570-17 ;V-1570-23 ;V-1570-25 ;V-1570-27 ;V-1570-29 ;V-1570-33 ;V-1570-53 ;V-1570-55 ;V-1570-57 ;V-1570-59 ;V-1570-61 ;V-1570-79 ;GIV-1570-FM ;V-1570-C ;V-1570-F ;GIV-1570C

Applications

Atlantic XB-8 The Fokker XB-8 was a bomber built for the United States Army Air Corps in the 1930s, derived from the high-speed Fokker O-27 observation aircraft. Design and development During assembly, the second prototype XO-27 was converted to a bomber pro ...

* Bellanca TES (1930 version) * Berliner-Joyce P-16 * Boeing XP-9 *

Boeing Y1B-9 The Boeing YB-9 was the first all-metal monoplane bomber aircraft designed for the United States Army Air Corps. The YB-9 was an enlarged alteration of Boeing's Model 200 Monomail commercial transport. Design and development In May 1930, Boei ...

Consolidated A-11 The Consolidated P-30 (PB-2) was a 1930s United States two-seat fighter aircraft. An attack version called the A-11 was also built, along with two Y1P-25 prototypes and YP-27, Y1P-28, and XP-33 proposals. The P-30 is significant for being the f ...

Consolidated P-30 The Consolidated P-30 (PB-2) was a 1930s United States two-seat fighter aircraft. An attack version called the A-11 was also built, along with two Y1P-25 prototypes and YP-27, Y1P-28, and XP-33 proposals. The P-30 is significant for being the f ...

Consolidated Y1P-25 Consolidated may refer to: *Consolidated (band) **'' ¡Consolidated!'', a 1989 extended play * Consolidated Aircraft (later Convair), an aircraft manufacturer *Consolidated city-county *Consolidated Communications * Consolidated school district *C ...

Curtiss A-8 The Curtiss A-8 was a low-wing monoplane ground-attack aircraft built by the United States company Curtiss Aeroplane and Motor Company, designed in response to a 1929 United States Army Air Corps requirement for an attack aircraft to replace th ...

* Curtiss B-2 Condor * Curtiss CO Condor *

Curtiss P-1 Hawk The P-1 Hawk (Curtiss Model 34) was a 1920s open-cockpit biplane fighter aircraft of the United States Army Air Corps. An earlier variant of the same aircraft had been designated PW-8 prior to 1925."US Military Aircraft Designations & Serials 19 ...

Curtiss P-6 Hawk The Curtiss P-6 Hawk is an American single-engine biplane fighter introduced into service in the late 1920s with the United States Army Air Corps and operated until the late 1930s prior to the outbreak of World War II. Design and development ...

* Curtiss XO-30 (not built) * Curtiss XP-10 *

Dornier Do X The Dornier Do X was the largest, heaviest, and most powerful flying boat in the world when it was produced by the Dornier company of Germany in 1929. First conceived by Claude Dornier in 1924, planning started in late 1925 and after over 240 ...

Douglas O-31 The Douglas O-31 was the Douglas Aircraft Company's first monoplane observation straight-wing aircraft used by the United States Army Air Corps The United States Army Air Corps (USAAC) was the aerial warfare service component of the United ...

Douglas O-43 The Douglas O-43 was a monoplane observation aircraft used by the United States Army Air Corps. Development Five Y1O-31A service-test aircraft were ordered in 1931, and delivered to the USAAC in early 1933 designated Y1O-43. They differed fr ...

* Douglas Y1B-7 * Huff-Daland XB-1 *

Lockheed YP-24 The Lockheed-Detroit YP-24 was a 1930s prototype two-seat fighter aircraft produced by Detroit Lockheed. An attack version called the A-9 was also proposed. The YP-24 is most remarkable for being the first fighter aircraft to bear the Lockheed ...

Thomas-Morse YO-23 The Thomas-Morse O-19 was an American observation biplane built by the Thomas-Morse Aircraft Company for the United States Army Air Corps. Development The O-19 was based on the earlier Thomas-Morse O-6 biplane. It was a conventional two-seat ...

Tupolev TB-3 The Tupolev TB-3 (russian: Тяжёлый Бомбардировщик, Tyazhyolyy Bombardirovshchik, Heavy Bomber, civilian designation ANT-6) was a monoplane heavy bomber deployed by the Soviet Air Force in the 1930s and used during the early ...

Other applications

Mormon Meteor III The ''Mormon Meteor I'' and ''III'' were two land speed record cars built in the 1930s by Ab Jenkins. Duesenberg Special The ''Duesenberg Special'' was a one-off speed record car. It was built in 1935 on a supercharged Duesenberg Model J rolli ...

(custom Bonneville salt flat race car)

Specifications (V-1570 direct drive)

References

Notes

Bibliography

* Gunston, Bill. ''World Encyclopedia of Aero Engines''. Cambridge, England. Patrick Stephens Limited, 1989. * Grey, C.G. ''Jane's all the World's Aircraft 1931'' London, England. Sampson Low, Marston & Company Limited {{US military piston aeroengines V-1750 1920s aircraft piston engines