WESTINGHOUSE J34 48 JET ENGINES MANUAL MANUAL

The first XB-51 made its first flight on Oct 1949. Martin accepted the new requirement and was received contract for two prototypes, the project was redesignated XB-51. Soon later USAAF revised its requirement for better close-support bombing. Martin Company proposed its design and won the competition with designation, XA-45. POWER PLANT: Three Г— General Electric J-47-GE-13 turbojet engines, rated at 2,700 kp eachД¬OMMENT: In early 1945, USAAF issued requirement for a new attack bomber for low-level bombing and close support as a successor to the Douglas A-26 Invader. TheВ North American B-45 вЂњTornadoвЂќВ already had production orders, and even it would be eclipsed by theВ Boeing B-47 вЂњStratojetвЂ™sвЂќ superior performance ( Ref.: 24).ДЄCCOMMODATION: Pilot and operator/navigator The B-46 program was cancelled in August 1947, even before flight testing had been completed, because it was already obsolete. There was also concern regarding the ability of the three man crew to exit the aircraft in case of an emergency, since the exit plan relied on the pneumatic system to hold the main door open against the airstream. Stability and control were excellent but there were engineering problems with engine de-icing, the cabin air system, and vertical oscillations caused by harmonic resonance between the wing and spoilers. Basic flight testing took place for five months, and by September 1947 it was concluded after 127 hours aloft on 64 flights by both the Convair Company and USAAF test pilots. The pilot praised its handling qualities. The XB-46вЂ™s first flight occurred 2 April 1947 after a month of taxi testing, and lasted ninety minutes. Likewise, production aircraft were intended to be built with theВ General Electric J47В engines with 2.345 kp static thrust rather than the J35s used on the prototype 50 caliber Browning M2 machine guns in a tail turret designed byВ Emerson Electric CompanyВ and provision was made for anВ APG-27В remote controlВ opticsВ and sighting system, but no weaponry was fitted into the prototype. Production versions were to be equipped with a pair of.

WESTINGHOUSE J34 48 JET ENGINES MANUAL MANUAL

The unusualВ flight control systemВ utilized a system ofВ pneumaticВ piping to transmit the pilots control inputs and actuate various systems, rather than the more typicalВ hydraulic, manual orВ electricalВ control lines and systems of most aircraft of the era. The engine air intakes were flat oval inlets, with a duct curving downward in a flat вЂњSвЂќ to the engines, which were mounted behind the leading edge of the wing. Each wing had fiveВ spoilersВ made of perforatedВ magnesiumВ alloy. The flaps extended via electrical actuators, and had very smallВ ailerons. The straight wing had anВ aspect ratioВ of 11.6, and was equipped withВ Fowler flapsВ which extended over 90 percent of the span, in four sections. The pilots sat in tandem in aВ pressurizedВ fighter-styleВ cockpitВ under a singleВ PlexiglasВ teardropВ canopyВ with the bombardier-navigator-radio operator in a transparent Plexiglas nose section. The fuselage turned out to be a problem, as it distorted under flight loads. The Convair XB-46 was a graceful design and had a long streamlined oval torpedo-shapedВ fuselage, long narrow straight shoulder-mounted wings with four Chevrolet-builtВ Allison J35-C3В axial-flow eleven stage turbojetsВ of 1.730 kp static thrust paired in an integralВ nacelleВ under each wing. The XB-46 would be completed with only the equipment necessary to prove its airworthiness and handling characteristics. In June 1946, the USAAF agreed to the substitution but that project was ultimately cancelled in December 1946 before the prototypes were completed. Company officials argued that it made more sense to allow them to complete the XB-46 prototype as a stripped-downВ testbedВ omitting armament and other equipment and for the USAAF to allow them to proceed with two XA-44 airframes in lieu of the other two XB-46s on contract. With the end ofВ WW IIВ severely curtailing budgets, the company considered canceling the XB-46 in favor of the other project as there was insufficient funding for both. In the fall of 1945, Convair found it was competing with itself with its XB-46 turbojet bomber when the USAAF became interested in an unorthodoxВ forward-swept wing turbojet attack design, theВ Convair XA-44 that the company had also been working on. Designs from this competition, sometimes named theВ вЂњClass of вЂ™45вЂќ, included the Convair XB-46, the Martin XB-48, and the North American XB-45 вЂњTornadoвЂќ. POWER PLANT: Four Allison J35A-3 turbojet engines, rated at 1.815 kp eachД¬OMMENT: In 1944, theВ US War departmentВ was aware of aviation advances in Germany and issued a requirement for a range of designs for medium bombers weighing from 36,287В kg to more than 90,718В kg.

Westinghouse j34-48 jet engines manual