Pivoting swivelling rudder for sailing boat - uses twin swivel axle segments secured to blade head by pivot axle pin and located bearing seats in stern

摘要

The rudder is assembled without the aid of connectors and metal fixings, using a ratchet affect with elastic elements (4) engaging half round notches (5) on the pivot axis (B) to secure it in the raised or partially raised position. Twin axle segments (2) in material with a low coefficient of friction sandwich the head of the blade between their chord faces (2a), their combined thickness normal to the blade plus that of the blade equalling the dia. of the root swivel axle. The assembly may be secured by a tubular pivot axle (3) and may drop into place between concave journals (8) provided in a stern post or similar, the pawl element (4) wedging in a housing (2c) in the top edge of the blade.