Quick Answer Summary: The Rolls-Royce Merlin Mk 100 is a 27-liter supercharged V12 piston engine rated at 1,645 horsepower at 3,000 rpm, representing the pinnacle of Merlin development during World War II. The Merlin Mk 100 arrived in 1944 as a developmental prototype, pushing the Merlin lineage into its most refined wartime form. Unlike earlier … Read more
Quick Answer Summary: The GE J47-GE-17 is an afterburning turbojet producing 7,500 lbf thrust at 7,950 rpm, the engine of the North American F-86D Sabre Dog and Italian Fiat F-86K . The J47 is the most mass-produced turbojet in history, with over 35,000 units built between 1948 and 1956. The -GE-17 variant added an afterburner … Read more
Quick Answer Summary: The Rolls-Royce Pegasus Mk 105 is a twin-spool vectored-thrust turbofan producing approximately 21,500 lbf thrust, with four rotating exhaust nozzles that enable vertical takeoff and landing in the Harrier . The Pegasus is the only production engine that makes fixed-wing VTOL practical: its four nozzles can rotate from downward thrust for hover … Read more
Quick Answer Summary: The Pratt & Whitney R-985 Wasp Junior is a 9-cylinder air-cooled supercharged radial engine displacing 985 cubic inches, producing up to 450 horsepower in wartime variants . The R-985 entered Army Air Corps service in 1932 at just 300 horsepower. Over the next decade, refinements pushed output to 450 hp, and the … Read more
Quick Answer Summary: The GE T64-GE-419 is a turboshaft engine in the 3,925–4,750 shp class, powering the CH-53E Super Stallion and MH-53E Sea Dragon heavy-lift helicopters . The T64 pioneered technologies that influenced generations of GE engines: corrosion-resistant coatings, front-drive free turbines, and film-cooled turbine nozzles and blades. The -419 variant pushes the engine close … Read more
Quick Answer Summary: The Rotax 912 S is a 1,352 cc four-cylinder horizontally opposed engine producing approximately 100 horsepower, with liquid-cooled cylinder heads and ram-air cooled cylinders, the standard powerplant for light sport and ultralight aircraft . The Rotax 912 family brought modern automotive-derived engineering to light aviation: liquid-cooled heads for thermal management, integrated reduction … Read more
Quick Answer Summary: The Allison 250-C28B is a turboshaft engine rated at 500 shp, featuring a single-stage centrifugal compressor, single combustion chamber, and two-stage free power turbine, weighing just 104 kg . The Model 250 began in 1958 as a simple, low-cost engine for both turboshaft and turboprop applications. By the time the -C28B variant … Read more
Quick Answer Summary: The GE F110-GE-129 is an afterburning turbofan in the 29,000 lbf thrust class, the only certified in-production engine powering every Advanced F-15 including the F-15EX . The F110-GE-129 is GE’s answer to the F100 competition, and it has become the engine of choice for the newest F-15 variants. With a three-stage blisk … Read more
Quick Answer Summary: The Pratt & Whitney F100-PW-220 is an afterburning turbofan producing 23,770 lbf maximum thrust with afterburner, the engine of the F-15C/D/E and F-16C/D . The F100 series began in the late 1960s for the F-X program that became the F-15 Eagle, and early versions experienced significant developmental challenges before maturing into one … Read more
Quick Answer Summary: The Pratt & Whitney R-1830-90C Twin Wasp is a 14-cylinder two-row air-cooled radial engine producing 1,200 horsepower, with 13,464 units built specifically for the Douglas C-47 . The R-1830 was one of the most efficient and reliable engines of the 1930s, and the -90C variant became synonymous with the C-47 Skytrain, the … Read more