British Test German Gyro Kite - Rar Riggers make final Adjustments before starting up the Gyro Kite August 3. In seat is Squadron Leader F.J. Cable, Raf, who ducked hurriedly when one of the rotor blades came adrift later. The British ministry of supply tested a German FA 330 Gyro kite at the Raf Station, Calshot, Hampshire, England, August 3. By the end of the war the Germans had produced 200 of these kites, which were intended to increase the observation range of U-Boats and were towed by a c