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Aviation History
1934
1934 - 0286.PDF
FLIGHT, MARCH 22, 1934 NEW AIRCRAFT The Bernard 52 C i T\ ESIGNED primarily as a twin-float seaplane fighter, the ^ Bernard 52 C I is rather similar, in general design, to the types 74 and 75 single-seater fighters which were entered for the recent French " Concours des Avions de Chasse." As may be seen from the G.A. drawings, the air- THE BERNARD 52 C I before proceeding to St. Raphael for official tests. craft is a mid-wing cantilever monoplane with divided float undercarriage. This type of undercarriage was chosen in order to allow a bomb to be carried centrally under the fuselage. (Which might indicate that the machine may be used for " dive bombing," a method of attack for which single-seater fighters seem to be coming increasingly popular, e.g., the American Curtiss and Boeing fleet fighters.) Fittings for catapult work are provided. Duralumin is the chief material used for the construction of this machine. Handley Page slots are fitted along the greater part of the leading edge of the wing, and trailing edge flaps of high aspect ratio are provided for a low Span Length Height Wing Area .. Weight loaded Speed at 11,483 ft. Ceiling Climb to 16,404 ft. Stalling speed BERNARD 3 500 m) 5 000 m) 52 C I. . 37-73 ft. (11,5 m) . 24-44 ft. (8,67 m) . 14-26 ft. (4,35 m) . 195-91 sq.ft. (18,2m2) . 4,019 lb. (1 827 kg) . 205 m.p.h. (330 km/h.) . 27,887 ft. (8 500 m) 7 min. . 61 m.p.h. (98 km/h.) landing speed. In connection with the Handley Page slots, we would remind the reader that the French Air Ministry recently concluded an agreement with Handley Page, Ltd., whereby the French Air Force and the French manufacturers may fit these slots to their aircraft. One other interesting feature is that a portion of the fuselage and the main structure of the wing are built integrally, as in some previous Bernard fighters. Sheet duralumin covering is used for the fuselage, which is of oval section. The section of the fin is unusually thick. At present, a Gn6me-Rh6ne K-9 engine of 500 h.p. is fitted, enclosed in a N.A.C.A. type cowling, but a later version of this engine, which gives 600 h.p. with no increase in weight, may be substituted. The performance figures given in the table apply to the aircraft fitted with the older type engine. The Martin 121 Flying Boat T JNUSUAL, in that it may be used as either a twin- engined or triple-engined type, the Martin 121, or, Span Length Height (three engines) ,, (two engines) • • Wing area As Weight emptv MARTIN 121 Dimensions . . 100 ft. (30,5 m). . . 61 ft. 2£in. (18,66 m). .. 20 ft. 9 in. (6,32 m). .. 15 ft. 10 in. (4,82 m). .. 1,204-2 sq. ft. (111,87 m»). a Three-engined Type . . 12,700 1b. (5 761 kg). Normal patrol weight, loaded . . 20,175 lb. (9 151 kg). Overload patrol weight, loaded . . 23,150 lb. (10 501 kg). Normal wing loading .. ,, power loading Maximum speed Landing speed Climb in 10 minutes .. Service ceiling .. ,4 s Weight empty Patrol weight, loaded. . . Wing loading Power loading Maximum speed Landing speed Climb in 10 minutesService ceiling Range at cruising speed .. 16-751b./sq.ft. (81,78kg/m2). .. 11 -701b./h.p. (5,31 kg h.p.). . . 143 m.p.h. (230,1 km/h.). ..67 m.p.h. (107,8 km/h.). .. 6,600 ft. (2 012 m). .. 14,600 ft. (4 450 m). a Twin-engined. Type .. 10,115 lb. (4 580 kg). . . 18,435 1b. (8 380 kg). .. 15-3 lb./sq. ft. (74,7 k;/m'). .. 16-0 lb./h.p. (7,26 kg/h.p.). .. 127-5 m.p.h. (205 km/h.). . . 64 m.p.h. (103 km/h.). . . 4,420 ft. (1 480 m)... 10,800 ft. (3 290 m). .. 1,900 miles (3 060 km). THE MARTIN 121 flying boat as fitted with three engines. 286
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