Abstract
The controllable pitch propeller, which has attained great importance in aviation, may have an equally important part to play in marine engineering.The author in this article reviews the history of the controllable pitch propeller, tracing its beginning from successful water turbine applications. His article is a timely follow‐up to the one by Dr. Nordstrom which was translated by the author and reprinted in the February 1940 issue of the Journal.After describing historical designs and applications, the author covers the field of current practice which is almost entirely limited to the Scandinavian countries. This is followed by a proposed design of the author, which is described in detail with particular regard to its application in the field of submarine propulsion.There can be but little doubt that we are due for considerable experimentation, in this country, with variable pitch propellers. What their future application may be must be left for the future to disclose.
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