Demonstatrion propeller Unfortunately this item is not available anymore.
A demonstration and training propeller model which shows how propeller pitch works and how is altered for various flying conditions. A thumb wheel allows to change and to block the pitch, another one allows to rotate the propeller. A very rare and nice, but heavy (2.8 KG / 6.17 lb) model. Measurements : height (propeller ins staright position) 40 cm (15.75"), the base 10 cm (3.94") each side.