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Aviation History
1934
1934 - 0593.PDF
FLIGHT, JUNE 14, 1934 FOREIGN AIRCRAFT t AMERICA'S FLEET FIGHTER : The Boeing F4B-4 with supercharged Pratt and Whitney " Wasp." BOEING SINGLE-SEATER FIGHTERS A Successful range widely used in the U.S.A. DOEING fighters to-day form the greater part of the *-* standard fighter equipment of the U.S. Army Air Corps and U.S. Navy. Two types are mainly used, the P-12E and P-12F by the Army, and the F4B by the Navy. When a fighting aircraft is used by the U.S. Army Air Corps it is known as a " pursuit " machine, but when used for naval duties it is classed as a " fighter." The P-12 and the F4B designs are basically similar. A parallel case exists in our own Air Force, the " Nimrod," our standard Fleet Fighter being developed from the " Fury," one of our standard land fighters. But while the " Nimrod " has been considerably modified for operation from aircraft carriers, even to the extent of being fitted with larger wings, the overall dimensions of the two Boeings remain approximately the same. We are particularly concerned here with the F4B-4 machine. While classed as a single-seater fighter, the machine is used also for light " dive bombing " work when it carries two I16-lb. bombs. The wings consist of two built- up box spars of spruce and plywood, with wooden Warren girder-type ribs. Frise ailerons, of duralumin construction, covered with corrugated duralumin sheet, are used, being fitted only to the top planes. Flotation gear is carried in the top planes. Welded chrome-molybdenum steel tubular construction is BOEING F4B—4 Pratt & Whitney " Wasp " DIMENSION'S Span (top) Span (lower)Length HeightWing area WEIGHT Weight empty Disposable load (Fighter) ,Disposable load (Bomber) Weight loaded (Fighter) ... .Weight loaded (Bomber) Wing loadingPower loading PERFOR Speed at sea level Speed at 6,000 ft. (1 830 m) .Landing speed Climb to 15,000 ft. (4 575 m) .Service ceiling .. .. 30 Jt. (9,13 ml 5 AND UANCE . 26 ft. 4 in. (8,02 m). 20 ft. 5 in. (6,2 m) 9 ft. 9 in. (2,9 m). 227.5 sq. ft. (21,1 mi) LOADINGS . 2,301 lb. (/ 045 kg) 714 1b. (324 fc«) • -. 1,045 lb. (474 kg) . 3,015 lb. (1 369 kg) . 3,356 lb. (1 524 kg) . 13 • 25 lb. /sq. ft. (64,6 kg/mi)6-03 lb./h.p. (2,7 kgjh.p.) TIGHTER) . 167 m.p.h. (267,2 km/hr) . 187 m.p.h. (299,2 km/hr)61 m.p.h. (97,6 km/hr) 9 • 5 rain.. 27,500 ft. (8 388 tn) used for that portion of the fuselage forward of the frontlower wing spar. Aft of this the fuselage is a duralumin semi-monocoque structure. The tail unit is of metal con-struction, the members being covered with corrugated duralumin sheet. The undercarriage is of the cross-axletype using Boeing oleo legs. A steel tube Vee, with its " apex " at the centre of the cross axle, takes the sideloads. A supercharged Pratt & Whitney " Wasp " engine of EXPERIMENTAL : The Boeing XF6B-1 single-seater fighter (" Twin Wasp Jnr.") developed from the F4B-4. 593
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