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Aviation History
1949
1949 - 1017.PDF
FLIGHT \\ (Below) Radio control is successfully used to keep model sailplanes circling in thermal*. This owner holds on amateur's licence for bis transmitter. Asymmetrical oddity: Tethered to the control line by its single wing, this pro- jectile is said to have exceeded 150 m.p.h. Modellers Take IN the ranks of the models enthusiasts there are twoschools of thought. One feels that flying a miniature raircraft on the end of a string is a negation of everything - implied by the term " flight"; the other is certain that con- trol-line flying is the be-all and end-all of mechanized hob- bies and lie most wildly exciting of sports—besides, they argue, a tethered machine cannot disappear into the blue, •< as free models have been known to do. The control-line ';:•..:. school fly their models in a circle by means of a. line which, being double, also serves to operate the elevators. The in- creasing power output of the miniature engines, mainly of (Left) Before the speed contest: weighing-4n a model which has secured records for its twelve-year-old designer. Fully faired-in engines are usual. (Below) Here a I.l-oz radio unit—port of which is alongside the fin— controls pitch and yaw by a " ruddevator " and governs engine speed
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