Click to view all Aircraft Engines: World War II articles starting with the most recent.
Allison V-3420 24-Cylinder Aircraft Engine - The Allison V-3420 24-cylinder engine was more than just two coupled V-1710s. The large engine showed promise, but other priorities and a lack of aircraft applications regulated the V-3420 to obscurity.
Armstrong Siddeley ‘Dog’ Aircraft Engines - In the 1930s, Armstrong Siddeley started a new line of engines named after dogs (canines). Most of these engines were radials with banks of inline cylinders. The most famous engine of the series was the Deerhound.
Dobrynin M-250, VD-3TK, and VD-4K Aircraft Engines - Through and after WWII, Soviet engineer Vladimir Dobrynin developed a series of 24-cylinder aircraft engines. These inline radial engines had six cylinder banks and produced 2,200 to 4,300 hp (1,640 to 3,207 kW).
Fairey P.24 Monarch Aircraft Engine - Designed by Richard Forsyth, the P.24 Monarch was Fairey Aviation’s final attempt to enter the aircraft piston engine business. The 24-cylinder Monarch was essentially two engines in a common crankcase.
FIAT A.38, A.40, and A.44 Aircraft Engines - The last piston aircraft engines designed by FIAT were distinct and innovative. However, the V-16, X-24, and X-32 engines never entered production due to WWII and because existing engines proved sufficient.
FKFS Gruppen-Flugmotor A, C, and D - The FKFS Gruppen-Flugmotor A, C, and D were attempts to create powerful, 48-cylinder aircraft engines for German WWII bombers.
Hispano-Suiza 24Z (Type 95) Aircraft Engine - Drawing inspiration from the 24Y engine, Hispano-Suiza developed the 24Z. The jet age made the large, 3,600 hp (2,685 kW) H-24 engine obsolete.
Isotta Fraschini Zeta X-24 Aircraft Engine - The Isotta Fraschini Zeta was an air-cooled, 24-cylinder engine developed in Italy during WWII. Flown only in the Caproni Vizzola F.6Z, cooling issues and Italy’s surrender limited the engine’s development.
Junkers Jumo 223 Aircraft Engine - The Junkers Jumo 223 was a 24-cylinder, diesel, opposed-piston, aircraft engine. The 2,500 hp (1,860 kW) engine was intended to be used in long-range aircraft during WWII.
Junkers Jumo 224 Aircraft Engine - Following the Jumo 223, Junkers designed a larger, 24-cylinder, diesel, opposed-piston, aircraft engine that was forecasted to produce 4,400 hp (3,280 kW).
Klöckner-Humboldt-Deutz (KHD) Dz 700, Dz 710, and Dz 720 - Starting in the late 1930s and continuing through WWII, KHD built a series of two-stroke, diesel aircraft engines. The culmination of this effort was the 5,900 hp (4,400 kW), 32-cylinder KHD 720.
Lycoming XH-2470 24-Cylinder Aircraft Engine - Lycoming worked to create a new engine by combining components from two O-1230 engines. The new engine was known as the XH-2470, but it was not developed in time to benefit the US Armed Forces.
Lycoming XR-7755 36-Cylinder Aircraft Engine - In 1943, Lycoming began work on a powerful and efficient engine intended to power the next generation of very large aircraft. The 5,000 hp XR-7755 ran in 1946, but such a large engine was no longer needed.
Nakajima [Ha-54] (Ha-505) 36-Cylinder Aircraft Engine - The Nakajima [Ha-54] (Ha-505) was an attempt to build a 36-cylinder, 5,000 hp (3,728 kW) radial engine for a bomber capable of striking the US. Technical issues and Japan’s decline brought the project to an end.
One Second in the Life of a Racer – by Tom Fey - Tom Fey breaks down the inner workings of a race-prepped Merlin engine as it powers a modified P-51 Mustang to 480 mph around the course at the Reno Air Races.
One Second on the Course with Dreadnought – by Tom Fey - Tom Fey breaks down the inner workings of the R-4360 engine installed in the Sanders Family’s air racer Dreadnought as it provides race-power on the course at the Reno Air Races.
Reggiane Re 101 to Re 105 Aircraft Engines - During WWII, the Italian aircraft manufacturer Reggiane designed a few aircraft engines. Only the Re 103 was built. It was an inverted W-18 that produced 1,740 hp (1,298 kW) and displaced 2,435 cu in (39.9 L).
Rolls-Royce Exe (Boreas) and Pennine Aircraft Engines - From the late 1930s to the mid-1940s, Rolls-Royce developed two air-cooled X-24 aircraft engines: the 1,200 hp (895 kW) Exe and the 2,800 hp (2,088 kW) Pennine. Neither engine entered production.
Wright Aeronautical R-4090 Cyclone 22 Aircraft Engine - During WWII, Wright Aeronautical built the 3,000 hp (2,237 kW) twin-row R-4090 using 22 cylinders from the R-3350 engine. The R-4090 was abandoned as all resources were needed on the R-3350.