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Aviation History
1914
1914 - 0102.PDF
Edited by V. E. The Collins-Hancock Monoplane. THIS machine was designed especially as a military scout. It can be easily dissembled for road transport, the wings folding against the front skids, thus making the overall dimensions 20 ft. by 7 ft. If necessary, the fuselage and nacelle, which are built up together, can be detached and fitted nacelle first in between the front skids, the tail plane and elevator being hung under the front elevator, thus reducing the length to approximately 15 ft. The only controls which would need attention are the front elevator and ailerons. The ailerons are controlled by rods and links, being absolutely rigid. JOHNSON, M.A. Referring to the drawing, the ailerons are hinged on to rods, B and B1, which are fixed inside the planes, so that they can revolve freely. These rods have links, A and A1, attached at their inside ends, which are connected to a rocking bar inside the nacelle, which rocks up or down according to the movement of the control lever. When the rocking bar is working, it pushes link A up and pulls link A1 down, or vice versa, thus revolving the rods B and Bl in opposite directions, so that one aileron attains a positive and the other a negative angle of incidence. The propeller revolves on the top member of the triangular fuselage, and is driven by bevel gears. The twin rudders are connected together by a rod, the control wires being taken from the ends of the rod. The pilot has a clear view below. It is essentially a speed machine, and will land at high speeds, but the landing chassis is one which has been proved satisfactory for large and heavy machines, so should be amply strong for this machine. —A.L.C. An Electrically-Driven Model- By H. RAMSEY KERRUISH. I have lately been experimenting with a model driven by an electric motor and carrying its own batteries. It weighs inclusive o| ozs. It has an area of 3^ sq. ft. The thrust (static) given is 2 oz., which is just sufficient to fly it, leaving hardly any reserve of power. The chief dimensions are : Span, 4 ft. 6 ins., chord, 9 ins., overall length, 2 ft. 11 ins. Elevator, span 18 ins., chord 4ins. The propeller, 14 ins. in diameter and 10 ins. pitch. The com plete weight of the plant is S-5 ozs., and of the model, 4 ozs. It is very lightly built, but neverthe less it is quite strong. It flies at 7 "5 m.p.h. in a dead calm, but will not fly in any wind. The power plant is made up of a common tri-motor [tripolar- motor?] specially wound and carefully lightened, driven by six small cells constructed somewhat on the lines of the Delarue silver chloride cell, but embodying certain alterations which I do not wish to make public at present. The thrust of 2 oz. mentioned above is given off by the plant for a period of about one and a half minutes. I have cut down weight in every possible way, using carpet thread soaked in glue for bracing [Japanese silk gut would have been preferable.—V.E.J. ] instead of wire, and covering the planes with the lightest chiffon doped with the thinnestlsolution sufficient for coherency. The model has flown quite well in suit able weather. The only place I have actually flown it in has been in the road opposite my house after dark, when little traffic is about, enough light to do so being afforded by the gas lamps. I start it off in the middle of the road and keep up with it by running, Iwhich is possible owing to its slow speed. As it has such a small reserve of power, it only rises about 4 ft. high, but keeps fairly con sistently at that height, so that I am able to keep it going in the direction I wish by lightly pushing the front to one side or the other. On one occasion, the only one on which I made any measurements, I steered it down the road in this manner for a distance of 152 yards, the flight then only finishing owing to a connection working loose. The general length of flight is considerably more than this, about 250 yards or so. It does a fairly good duration owing to its slow speed, but I have never actually timed it. It finished its career in a rather remarkable manner. I determined to be up-to-date, and make it loop the loop. I therefore fitted a 10 in. screw of 6 in. pitch, which ran at a tremendous speed when the cells were fully charged, but only lasted a short time. I then fitted a large vertical fin under the main planes, to pre vent the unbalanced torque of the rotary propeller turning the machine over when at the top of the loop, and over-elevated. I placed the model on 102
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