Martin B-26 Marauder | HOW TO FLY ONE | WW2 Twin Engined Medium Bomber
The Martin B-26 Marauder is an American twin-engined medium bomber that saw extensive service during World War II. The B-26 was built at two locations: Baltimore, Maryland, and Omaha, Nebraska, by the Glenn L. Martin Company.
First used in the Pacific Theater of World War II in early 1942, it was also used in the Mediterranean Theater and in Western Europe.
After entering service with the United States Army aviation units, the aircraft quickly received the reputation of a “widowmaker“ due to the early models’ high accident rate during takeoffs and landings. This was because the Marauder had to be flown at precise airspeeds, particularly on the final runway approach or when one engine was out. The unusually high 150 mph (241 km/h) speed on a short final runway approach was intimidating to many pilots who were used to much slower approach speeds, and when they slowed to speeds below those stipulated in the manual the aircraft would often stall and crash.
The B-26 became a safer aircraft once crews were re-trained and after aerodynamic modifications (an increase of wingspan and wing angle-of-incidence to give better takeoff performance, and a larger vertical stabilizer and rudder). The Marauder ended World War II with the lowest loss rate of any U.S. Army Air Forces bomber.
A total of 5,288 were produced between February 1941 and March 1945; 522 of these were flown by the Royal Air Force and the South African Air Force. By the time the United States Air Force was created as an independent military service separate from the United States Army in 1947, all Martin B-26s had been retired from U.S. service. After the Marauder was retired the unrelated Douglas A-26 Invader then assumed the “B-26“ designation which led to confusion between the two aircraft.
In March 1939, the United States Army Air Corps issued Circular Proposal 39-640, a specification for a twin-engined medium bomber with a maximum speed of 350 mph (560 km/h), a range of 3,000 mi (4,800 km) and a bomb load of 2,000 lb (910 kg). On 5 July 1939, the Glenn L. Martin Company submitted its design, produced by a team led by Peyton M. Magruder, to meet the requirement, the Martin Model 179. Martin’s design was evaluated as superior to the other proposals and was awarded a contract for 201 aircraft, to be designated B-26. The B-26 went from paper concept to an operational bomber in approximately two years. Additional orders for a further 930 B-26s followed in September 1940, still prior to the first flight of the type.
Closeup view of a Martin B-26B Marauder in flight
The B-26 was a shoulder-winged monoplane of all-metal construction, fitted with a tricycle landing gear. It had a streamlined, circular section fuselage housing the crew, consisting of a bombardier in the nose, armed with a .30 in ( mm) machine gun, a pilot and co-pilot sitting side by side, with positions for the radio operator and navigator behind the pilots. A gunner manned a dorsal turret armed with two .50 in (12.7 mm) machine guns (the first powered dorsal turret to be fitted to a U.S. bomber), and an additional .30 in ( mm) machine gun was fitted in the tail.
Two bomb bays were fitted mid-fuselage, capable of carrying 5,800 lb (2,600 kg) of bombs, although in practice such a bomb load reduced range too much, and the aft bomb bay was usually fitted with additional fuel tanks instead of bombs. The aircraft was powered by two Pratt & Whitney R-2800 Double Wasp radial engines in nacelles slung under the wing, driving four-bladed propellers. The engines were manufactured at the Ford Dearborn Engine plant in Dearborn, Michigan.
General characteristics
Crew: 7: (2 pilots, bombardier/radio operator, navigator/radio operator, 3 gunners)
Length: 58 ft 3 in ( m)
Wingspan: 71 ft 0 in ( m)
Height: 21 ft 6 in ( m)
Wing area: 658 sq ft (61.1 m2)
Airfoil: root: NACA 0017-64; tip: NACA 0010-64
Empty weight: 24,000 lb (10,886 kg)
Gross weight: 37,000 lb (16,783 kg)
Powerplant: 2 × Pratt & Whitney R-2800-43 Double Wasp 18-cylinder radial piston engines, 2,000–2,200 hp (1,500–1,600 kW) each
Propellers: 4-bladed constant-speed feathering propellers
Performance
Maximum speed: 287 mph (462 km/h, 249 kn) at 5,000 feet (1,500 m)
Cruise speed: 216 mph (348 km/h, 188 kn) * Landing speed: 114 mph (99 kn; 183 km/h)
Combat range: 1,150 mi (1,850 km, 1,000 nmi) with 3,000 pounds (1,400 kg) bombload and 1,153 US gal (4,365 l) of fuel
Ferry range: 2,850 mi (4,590 km, 2,480 nmi)
Service ceiling: 21,000 ft (6,400 m)
Rate of climb: 1,200 ft/min (6.1 m/s)
Power/mass: hp/lb ( kW/kg)
Armament
Guns: 11 × .50 in (12.7 mm) M2 Browning machine guns. One flexible in nose position, four fixed in blisters on the fuselage (aimed and fired by the pilot), two in the dorsal turret, two in tail turret, one @ in P & S waist positions
Bombs: 4,000 lb (1,800 kg)
#b26 #marauder #aircraft
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