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תמונות:Favionics in collaboration with Victor Stamov, has developed the "renHook".
renHook stands for Rotary ENcoder Hook and is a revolutionary new towhook for F1A. renHook replaces traditional hook front and latch switches with just a single encoder chip which measures the angle of the hook. depending on angle, the Favionics FX10 timer can determine the current operation of the pilot, selecting straight or circle tow. acceleration is measured dynamically from additional hook rotation caused by the deformation of the front load cell. the back of the hook has a new "circle plus" feature which allows for additional tow rudder when needed.
The main motivation for the renHook design is simplicity. the renHook has basically only 1 moving part (not counting the latch mechanism). the elimination of all switches and gages simplifies the design and opens new possibilities for on line acceleration