Graupner,Verstellpropeller,1382

Verstellpropeller Graupner 1382 This propeller makes the impossible possible! Fitted to a slow-fly model such as the GRAUPNER FASCINATION, this prop enables the aircraft to fly backwards - at least for brief periods. The propeller features a diameter of 240 mm, but must be used with a motor featuring a tubular (hollow) shaft. A supplementary servo can then be used to alter the pitch, i.e. the propellerpitch is infinitely variable in both directions.