Application of electric equipment for ship-propeller milling machine

摘要

THE ship screw propeller, introduced a little over a century ago, is now used almost universally.1 Large high-speed passenger and naval vessels of the present day use propellers as large as 22 feet in diameter. These screws must transmit very large amounts of power which causes them to erode and pit rapidly. Erosion and cavitation can be minimized and the efficiency of power transmission increased by the use of smooth accurately finished blades.