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Aviation History
1916
1916 - 0284.PDF
I/LIGHT 1 APRIL 6, 1916 A "POPULAR" TYPE AEROPLANE DESIGN. By C. M. POULSEN Concluded from page 240.) WITH regard to the controls, these should be kept as simple and straightforward as possible. The accom panying sketch shows one arrangement which should prove suitable. A longitudinal rocking shaft in the form of a steel tube rests in bearings formed by steel clips in the manner shown. The control lever itself, which can "Fliclit" Copyright. Diagrammatic perspective view of tbe controls.—Tbe floor boards of tbe pilot's cockpit have been omitted in order to show more clearly the mount' ing of the controls. on top of the rear spar of the lower plane at a point below the aileron crank lever. The tube running to the transverse shaft is anchored to a crank lever in the centre of this shaft as shown, and some distance out along the shaft on each side is another double crank lever from which wires are taken to the d e f $ h i-n\ I /-MI I H4\ I on <**' /•« 1-2 1-01 O-tf "Flight" Copyrljht Section of a strut, with dimension figures. either be a tube or a wood stick, is provided with two slots, one at the bottom for the rocking shaft and another a few inches higher up into which is passed the end of another tube running to a transverse tubular shaft mounted on the former immediately behind the pilot. A transverse bolt passing through the control lever and rocking shaft allows of moving the lover forward and backward, while a side to side movement of the lever will rotate the rocking shaft. At the rear end of the latter is a short crank lever, whence cables run to pulleys mounted elevator crank levers. This type of controls will be easy to make and could be rigged up by any amateur, and while not possessing such refinements as ball bearings, &c, will be found to work quite well. The suggested arrangement for operating the elevators has the advantage of avoiding crossing of the elevator cables. A foot bar mounted on a bracket, as shown, will complete the controls. In the sketch the foot boards, or floor, of the pilot's cockpit have been omitted in order to show more clearly the arrangement of the controls. Three-quarter view, from in front, of the "Popular" biplane. 284 1 Flight" Copyright
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