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Aviation History
1925
1925 - 0593.PDF
SEPTEMBER 17, 1925 "BRISTOLS" IN ITALY New Caproni Fitted With Two " Jupitejfs" ONE of the great advantages claimed for the radial air-cooled aero engine is its short overall length, which has the effect, when the engine is mounted in the nose of a tractor biplane, of greatly reducing the moment of inertia, thus adding very materially to the manoeuvrability of the machine. That the radial engine has other advantages may be granted, but we think that perhaps the one just mentioned is often the decid- ing factor in the choice of engines for certain performances. The machine in question is known as the Caproni 80, and has been designed as a night-bomber. From the accompany- ing illustrations it will be seen that the machine has somewhat the appearance of a semi-thick-wing flying boat, although, in point of fact, the C.80 is a land machine, but with a boat-built fuselage, and the hull placed very much as is the hull of a flying boat. In this respect, the general arrangement is somewhat reminiscent of that of the D.H.10. but the two THE CAPRONI 80 A night-bomber fitted with two Bristol quarter front view. Jupiters " mounted in tandem. Three- Another possibility of benefiting by the short length of radial engines has just been demonstrated by the famous Italian aircraft designer, Giovanni Caproni, by the production of a new type of machine in which two Bristol " Jupiter " engines are placed in tandem above the hull. Thanks to the arrange- ment of the engines, it has been possible to design a machine in which, in spite of the tandem arrangement, all heavy masses are concentrated within a fairly small compass, with conse- quent gain in manoeuvrability. engines, instead of being placed on the wings, are, as alreadymentioned, placed centrally one behind the other above the hull, one driving a tractor airscrew and the other a pusher.The tandem arrangement of engines has never been very much favoured in this country, but is one which has con-siderable vogue in certain foreign countries, notably in Italy, and it may be recollected that this is the arrangement chosenin the famous Dormer " ^Y,^-" ol the type used by Amundsen in his recent attempt'To reach the North Pole, and which THE CAPRONI 80 NIGHT-BOMBER : Side view. 593
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