WORLD RECORD MODELS
Aftermany months of experimentation Mr. Wallace A. Lauder succeeded in producing a model that proved to be one of his most successful models. But a few years ago flights of 1000 feet with a duration of 60 seconds were considered remarkable. But so rapid has been the development of the rubber strand driven model that to-day it is hardly considered worth while to measure a flight of 1000 feet, especially in contests where models fly over 2500 feet or 3537 feet which was the distance flown by Mr. Lauder’s model during one of the contests of the National Model Aëroplane competition of 1915. Mr. Lauder’s model on several occasions made flights of over 3500 feet with a duration in each event of over 195 seconds. It is therefore to be remembered that this modelis both a distance and duration model, both qualities being seldom found in one model.
Reference to the accompanyingdrawingwill give a clear idea of the constructional details.
The frame or fuselage consists of two side members 40″ in length, of straight grained spruce. At the center each member is of approximately circular cross section, and is ¹⁄₄″ in diameter. The members taper to about ³⁄₁₆″ at the ends, the circular cross section being maintained throughout. The frame is braced by a strip of bamboo of streamline form, extending from one side member to the other, 18″ from the apex of the frame. The ends of this frame are bent to run parallel to the side members of the frame where they are secured by binding with silk thread and gluing. Piano wire hooks are also secured to the side members of the frame adjacent the ends of the cross brace, and from these hooks extend wires of steel (No. 2 music wire) which run diagonally to the rear brace or propeller spar where they are secured.