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Aviation History
1922
1922 - 0485.PDF
AUGUST 24, 1922 the-top plane a wire is taken from the point where the main struts cross each other to the top spar, while from the same point on the struts an external drag wire runs to the nose 01 the fuselage. The incidence of the outer portion of the wings is adjusted by means of the members running from the auxiliary spars to the main struts, but, owing to the obliquity of these struts, it might be imagined that considerable stress would be put on the spars and ribs with travel of the centre of pressure. Contrasted with the tendency in British design towards a duplication of parts and relatively small factors of safety on each, the Hanriot wing bracing is interesting as an example H H of the opposite method : as few parts as possible, and these of necessity highly stressed. It would appear that a lucky shot in one of the main inter-plane struts might seriously endanger the strength of the wing structure, as might also a shot in one of the single main spars. The main characteristics of the Hanriot 15 are as follows •" Length o.a, 25 ft. 7 ins. Span, 35 ft. Wing area, 300 sq. ft. Height 9 ft 10 ins. Gap, 5 ft. 3 ins. Weight, empty, 2,300 lbs. Weight of fuel, 660 lbs. Useful load, 880 lbs. Total loaded weight, 3,840 lbs. Wing loading, 12-8 lbs./sq. ft. Power loading, 12-8 lbs./h.p. Speed at 23,000 ft. (estimated), 143 m.p.h. Climb to 23,000 ft. in 25 .mins. Theoretical ceiling, 33,600 ft. H III THE entries list for the Coupe Deutsch race, which is to be flown over the Villesauvage-laMarmognecourse.nearEtampes, on September 30, has now been closed, and we regret that only one British machine, the " Mars I " of the Gloucestershire Aircraft Co., has been entered. The race is undoubtedly the most important international speed race in Europe, and it had been hoped that the Bristol monoplane racer witli Bristol " Jupiter " engine would be entered. This, it now appears, has not been found possible, owing to the difficulties of getting such a fast machine tuned up in time, and the task of repre senting Great Britain will thus rest entirely with Mr. J. H. James. That he will be matched against "some formidable " projectiles " goes without saying, but the "Mars I " has been considerably cleaned up of late, and James should be in a position to put up a creditable fight for the Coupe Deutsch. Italy has entered one machine, the Fiat, flown by Brack Papa. This machine has a 700 h.p. Fiat engine, and will thus easily be the most powerful in the race. France has entered no less than six machines, and as each country is only allowed to enter three machines in the race, eliminating trials will have to be held. The six French machines, pilots and engines are : Jean Casale (type Casale), B16riot with 400 h.p. Lorraine engine ; Nieuport-Delage biplane, 320 h.p. Hispano-Suiza, to be flown b5' Lasne or Berthelin ; two Nieuport-Delage " Sesquiplans," 320 h.p. Hispano-Suiza engines, to be flown by Lasne and Sadi Lecointe ; Madon " Simplex " monoplane, 320 h.p. Hispano- Suiza, to be flown by Canivet; and one machine, type and engine not stated, to be flown by Nungesser. The Nieuport-Delage biplane is the old type which is already well known. The " Sesquiplans " will probably be THE COUPE DEUTSCH Only One British Representative similar to that with which Kirsch won the Coupe last vear but with minor modifications. The Bleriot, type Casale is an unknown quantity, but we believe that, as a matter of fact, it is a Spad-Herbemont, fitted with the Bristol " Jupiter" engine which recently passed the French Air Ministry Type Tests. The Madon monoplane, type " Simplex," is evidently an outcome of the experiments which M. Canivet has been carrying out for M. Madon on tailless machines. The machine on which the experiments were made was a small biplane with rotary engine, the longitudinal stability apparently being derived from back-swept wings, after the fashion of the Dunne. How this system makes for extra speed is a little difficult to see ; the Dunne certainly was not wildly fast. On the other hand, the suppression of the tail should result in a certain saving in resistance, but it might be expected that this advantage would be nullified by the alterations necessary to the wings. The machine entered by Nungesser is quite an unknown quantity, but no doubt something will be heard of it in the eliminating trials. The 700 h.p. Fiat is probably the same machine as that flown by Brack Papa last year, possibly with minor alterations by way of cleaning up. Altogether it looks as if James is going to have his work cut out, but Mr. Folland has not been entirely idle of late, and may be expected to have something up his sleeve! The Aerial Derby gave no indication of the speed of which the " Bamel " was really capable, much less of what it can do when in trim for an event like the Coupe Deutsch. THE FARMAN FOUR-ENGINED NIGHT BOMBER: At the last Paris Aero Show one of the machines exhibited on the Farman stand was a large four-engined night bomber, the B.N.4, with four Lorraine-Dietrich engines of 400 h.p. each. This machine has now been flown, M. Bossoutrot taking it into the air on August 1, before the " Section Technique.'* The B.N.4 weighs, with full load, about ten tons, and carries fuel for a flight «f seven hours' duration. In addition it is armed with machine guns for repulsing attack, and carries a long-range wireless outfit, so as to be always in communication with its base.
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