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Aviation History
1923
1923 - 0777.PDF
DECEMBER 27, 1923 TWO RECENT AMERICAN COMMERCIAL PLANES The Lincoln-Standard L.S.5 and the Laird Limousine THE Lincoln-Standard L.S.5 was designed by O. W. Timm,chief engineer of the Lincoln-Standard Aircraft Corporation, of Lincoln, Neb., to meet the demand for a practical five-seatercommercial passenger-carrying aeroplane. Tests with the first model proved to be very successful, and the machine wasput into production. Safety and comfort for the passengers were the first considerations. Among the other principalpoints that were carefully considered are, the safety factor, Valspar varnish, the exterior is finished in dark maroon.Valspared, while the motor compartment is painted with a. grey fire-resisting paint. The engine is enclosed by a motor-car type " bonnet " of polished aluminium, hinged at the tup and sides, and held in place by six spring fasteners. The wings are constructed in conventional truss form, thetop plane being of larger span than the lower. The overhang is braced with steel tubing, streamlined with Balsa wood. THE LINCOLN-STANDARD L.S.5 COMMERCIAL AEROPLANE : Three-quarter rear view of tbe completemachine, showing the semi-enclosed cabin, seating four passengers. durability, economy of operation, repair and replacement ofparts, and minimum of work in up-keep, etc. As regards the construction of the machine, the fuselageis of orthodox rectangular cross-section, the maximum depth being 4 ft. 4 ins. and the maximum width 2 ft. 9 ins. Thepassenger compartment is 4 ft. 9 ins. in length, and is richly upholstered with maroon-coloured leather. Accommodationis provided for four passengers with comfort, two being seated facing forward and two seated opposite looking aft. Thepassengers are protected from the wind by the partially enclosed portion of the cockpit. This enclosed portion,resembling the " cab " of a locomotive, is constructed of ply- wood, and is provided with circular windows. Three steps on The top plane is in two main panels and one centre section,and the lower plane is in two panels. In the centre section, which is built up of two main spars and plywood, is the•12-gallon petrol tank, provided with a positive sight gauge. The wing spars are of spruce, routed to I-beam section, andthe ribs are of the web type. Ailerons are fitted to the top plane only, being hinged to the rear spar. Wing fittings are ofplate form. The interplane struts are attached to universal sockets and secured with pins. The wings are covered with along fibre cotton fabric, and doped with four coats of acetate and two coats of nitrate dope pigmented with aluminium.' The horizontal stabiliser is of the non-lifting type, and is constructed of wood braced with cable. The elevators are of THE LINCOLN-STANDARD L.S.5 COMMERCIAL AEROPLANE : Three close-up views : on the left, the 180 b.p. Hispano-Suiza engine in situ ; centre, the passengers' and pilot's cockpits; right, the landing gear. the outside of the fuselage five access to the passengers' cockpit. The longerons are of ash, braced with jj-in. three-plyHaskelite walls and plywood bulkheads from the nose to the pilot's cockpit, which is located immediately behind thepassengers' compartment. Aft of the pilot's cockpit the fuselage is of the usual girder construction, fabric covered.The interior wood parts are covered with several coats of wood, built up on a continuous steel tube, whilst the rudder,which is balanced, is constructed with a steel tube main spar and trailing edge, and wood ribs. A conventional V-type landing gear is fitted, being attached.to the fuselage with hinge-fittings. The struts arc of steel tubing, streamlined with Balsa wood. Two 30-in by 5-iii.wheels run on a nickel-ste<;l tubular axle, 'Z\ ins. in diameter. The axle is not provided with guides, but the action in limited 777
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