Air Turbine Interlocking Blade Root and Hub Assembly

An arrangement for rapid assembly of an air turbine having several blades, each blade interlocking with an adjacent blade at the blade root. The turbine is assembled by axially sliding keys on each blade root with keyways on the adjacent blade root in an interlocking manner. A hub and clamping plate are provided which when tightened through the assembled blade roots enhances the positional accuracy and rigidity of the blades and provides additional structural strength of the turbine assembly. The radial angular geometry of the blade root determines the number of blades in the complete turbine assembly. The blade root may have a tapered recess on one face and an annular recess 9 and annular dimples 11 on the other face to facilitate the locking action of the turbine hub and clamping plate. The hub may have a clamping face incorporating tapered pins which cooperate with the tapered recess in the blade root. The clamp plate has means to releasably secure it to the hub.