Rake. Free flight tailless power model.
Quote: "A free-flight tailless sports power model, suitable for engines of about 0.5 cc.
THE purpose of this design was to produce an out-of-the-rut sports model that was easy to fly, hard to damage and, at the same time, have that sleek, functional look which we associate with the contemporary trend. Too often the powered tailless model is given to a chunky, sawn off appearance and to avoid this a slim, glider type, fuselage was chosen with a high, raked back fin and a thin plywood engine mount. To add to the general rakish appearance and to get the best structural and aerodynamic advantages a tapered, rather than a parallel chord wing, was selected.
The wing with its inbuilt tip wash-out may not be the easiest kind to construct, but is worth the extra effort, especially as this is more than compensated by the simplicity of the rest of the model. All in all, total building time is less than for an orthodox cabin sports model of similar size. Just how realistic a functional model can look in flight was demonstrated when, on one of its test flights, it climbed swiftly away over Chthham Common. The raked wing, slim lines and high fin giving every suggestion of a modern jet!
Wing. Rib outlines can be traced on to the 1/16 in medium sheet balsa by using light carbon paper. Notice that the spar slots are oversize to the spar sections. This allows for the extra width required in the diagonal setting on the sweep back. Also note that the leading edge cut on the ribs affected by tip washout is canted back. Other spars affected by the wash-out should be steam or heat treated, to avoid adverse tension and trailing edge droop..."
Rake, Model Aircraft, March 1963.
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