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Aviation History
1911
1911 - 1128.PDF
JycHf Detail view, showing the front section of the beautifully constructed R.E.P. monoplane. Circuit of Europe, and with which our readers are already acquainted. The new oo-h.p. R.E.P. motor, which has its seven cylinders arranged radially around the crank case, was also on exhibition on the stand. Principal dimensions, &c. :— Length 25 ft. Span 40 ft. Area 220 sq. ft. Trie; ... Weight Speed Motor ... £1,200. 880 lbs. . 68 m.p.h. . 6o-h.p. R.E.P Roger Sommer. ROGER SOMMER was represented at the Salon by two machines, a monoplane and a biplane, the latter constructed throughout of DECEMBER 30, 1911. steel. The biplane should really be termed a double monoplane, for the cellular method of bracing the main planes has disappeared in favour of the system originated by Breguet. Balancing laterally is effected by the rotation around the front spar, of the extensions of the top plane. Its chassis, supported by six steel tubes, is composed of a pair of wheels mounted on a common axle, which latter is flexibly attached by means of stout rubber bands to the short steel tubes uniting the steel chassis struts. One peculiarity about this landing gear, which is directly descended from the original Henry Farman conception, is that the radius rods have disappeared. The 50-h.p. Sommer monoplane at the Paris Salon, Elevation and depression of the machine is controlled by a small monoplane surface, measuring about 2 ft. span by I ft. chord, supported on steel outriggers about 8 ft. in advance of the main plane, which surface works in conjunction with a flap hinged to the rear of the lifting tail. Its diminutive size makes one wonder if this surface is of any use at all as an elevator, and the only apparent advantage of the system is that the outriggers form a good point from which to brace the main planes against drift strains. The main planes, which are double-surfaced with leaf-green fabric, for the purpose of rendering them invisible when close to the ground, are tested before they leave the works to withstand a strain of four times that they are ever likely to be called upon to bear in normal flight. Principal dimensions, &c. :— Biplane— Length 30 ft. Span 40 ft. Area 330 sq. ft. Price ... Monoplane— Length 22 ft. Span ... ... 29 ft. Area ... ... 176 sq. ft. Price ... Weight Speed Motor ... £840 Weight Speed Motor ... £640. . 640 lbs. . 56 m.p.h. 50-h.p. Gnome. • 575 lbs. 65 m.ph. 50-h.p. Gnome Vinet. Two types of monoplane were represented. The first was of a modified Bleriot type with flat stabilizing tail and wheel and skid undercarriage, the second was of the low centre of gravity type. As the first of these models presents no striking departure from AT THE PARIS AERO SALON.—The current trend of design towards the torpedo type of body is well illustrated by these photographs: the Aero Torpedo on the left is the two-seater Breguet, with Chenu motor, and on the right is" the unfinished Morane-Saulnier war monoplane; it is constructed entirely of steel, including the wing skeletons. 1136
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