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Aviation History
1940
1940 - 0974.PDF
covering. The fin is a cantilever structure of high aspect ratio, and the horizontal surfaces are strut-braced on the upper surface. The wheels of the undercarriage retract inwards. They have low-pressure tyres and hydraulic brakes and are sloped outward, increasing the effective track. Various marks of the Hispano-Suiza 12Y engine have been installed. These include the 12 Ycrs and Ydrs and 12 Y31. Typically the Hispano 12Y, which is a twelve-cylinder vee, cooled by ethylene glycol, gives 860 h.p. at about 13,000 ft. on the bench, the maximum benefit of the supercharger naturally being obtained at higher altitudes. There has been mention of a Morane M.S.450 fighter with a 12Y 51 en- gine of 1,000 h.p. The radiator on the standard M.S. 406 is of the retractable type and gives a flow of 8 cubic metres per second. It is situ- ated under the The side view on the right is actually of an M.S.405 but is almost identical with that of the M.S.406. Below are M.S.406Sin production. The panels of Plymaxcan be seen on the wings. • b FLIGHT April 4, 1940 Visitors to the military flyingdisplay at Evere last year will recall the pretty show put upby three Moranes. Here they are taxiing in through thedust storm. fuselage behind the bulge beneath the engine and for- ward of the characteristic " belly" of the fuselage. Early machines were fitted with three-bladed Ratier air- screws of special design to permit the use of an engine- mounted shell-gun. A small windmill mounted in front of the main airscrew was used to alter the pitch. This pro- peller has now been super- seded by a later type which still accommodates the canon but in which the windmill is eliminated. The armament of thr M.S.406 as at present in ser- vice comprises a 20 mm. Hispano-Suiza shell-gun mounted between the cylinder blocks and firing oul through the airscrew hub. the shaft having been suit- ably geared up. This arrangement constitutes the Hispano moteur canon. The crankcase has, of course, been suitably modified and strengthened. As the mass of the engine is a very effective mount- ing for a gun, the weapon chosen is of the "long" type with an initial velocity of something like 830 m/sec. It corresponds to the Oerlikon type " FFS," and has a " Flight piioiooraph. w m
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