Under the initial designation Douglas XA-42 for an attack bomber, redesignated subsequently XB-42 as a bomber, Douglas designed and built two prototypes and one static test airframe under a contract received from the US Army Air Force on 25 June 1943. Named Mixmaster by the company, this unusual aircraft had a mid-set cantilever monoplane wing, cruciform tail surfaces and tricycle landing gear, whose main units retracted aft to be housed in the sides of the fuselage. The broad and deep fuselage provided accommodation for a crew of three, consisting of a bomb-aimer/navigator in the nose, with the pilot and co-pilot in a side-by-side co*ckpit well forward on the fuselage, each beneath an individual canopy; the fuselage also incorporated a large internal bomb bay, as well as housing the twin-engine powerplant in a compartment immediately to the rear of the pilot's co*ckpit. The two Allison V-1710 engines were used to drive, via shafting and a reduction gearbox in the tailcone, two three-bladed contra-rotating pusher propellers to the rear of the tail unit.
Despite its unusual features, when first flown on 6 May 1944 the Mix-master more than lived up to expectations. The second prototype was flown for the first time on 1 August 1944, soon afterwards being modified by the addition of a single canopy over the pilot/copilot co*ckpit. This prototype was destroyed in a crash during December of that year, but by that time the USAAF had decided not to proceed with production of this design, awaiting instead the development of higher-performance turbojet-powered bombers. As an interim step to allow evaluation of turbine power, the first prototype was given a mixed powerplant comprising two 1025kW Allison V-1710-133 piston engines to drive the propellers, plus two 726kg thrust Westinghouse 19XB-2A turbojets mounted in underwing nacelles. Redesignated XB-42A, this aircraft was used for performance testing over several months before being retired at the end of June 1949.
FACTS AND FIGURES
© The XB-42 originally had aseparate bubble canopy for eachpilot so as to minimize drag.Unfortunately this arrangementmade communication verydifficult and was greatly disliked.
© Opening the bomb doorsin flight interrupted theairflow to the propeller andcaused excessive vibrations.
![Douglas XB-42 - experimental bomber (1) Douglas XB-42 - experimental bomber (1)](https://i0.wp.com/www.aviastar.org/../../pictures/usa/douglas_b-42-s.gif)
© The bomber version had sixmachine guns. The four on thewing trailing edge were aimed bythe copilot, whose seat could turnto face aft. An attack version armedwith 16 machine guns or a 75mm cannon and two machineguns, or two 37mm cannonwas proposed.
© The XB-42A was retired in 1949and is now in storage for theNational Air and Space Museum.Somewhere along the way itswings were removed for transportand haven't been seen since.
Douglas XB-42 on YOUTUBE
3-View |   |
A three-view drawing (550 x 777) |
Specification |   |
MODEL | XB-42 | |
ENGINE | 2 x Allison V-1710-125, 988kW | |
WEIGHTS | ||
Take-off weight | 16193 kg | 35700 lb |
Empty weight | 9475 kg | 20889 lb |
DIMENSIONS | ||
Wingspan | 21.49 m | 71 ft 6 in |
Length | 16.36 m | 54 ft 8 in |
Height | 5.74 m | 19 ft 10 in |
Wing area | 51.56 m2 | 554.99 sq ft |
PERFORMANCE | ||
Max. speed | 660 km/h | 410 mph |
Cruise speed | 502 km/h | 312 mph |
Ceiling | 8960 m | 29400 ft |
Range | 2897 km | 1800 miles |
ARMAMENT | 4 x 12.7mm machine-guns, 3629kg of bombs |
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