for 21/71 or 20/72 reductor
okoume plywood made in unidirectional layers of 2.2 mm, phenolic adhesive
diameter 113/115
pitch 62/68 cm for gear rate 21/71 (the operation of the small diameter propeller, such as this one, is influenced by the aerodynamics of the machine, therefore the best pitch can vary according to the characteristics of the frame and the efficiency of the engine.)
pitch 74/82 cm for gear rate 20/72
weight 600 g approx