IT is only recently that the variable pitch airscrew has passed from the experimental to the practical field, and the Hamilton Standard Company is one of the first firms in a position to claim that realisation has obtained the practical sanction of regular use on commercial and service aircraft.
(1935), "The Hamilton Standard Airscrew: A Successful Type of Variable Pitch Airscrew in Use in Several Countries", Aircraft Engineering and Aerospace Technology, Vol. 7 No. 2, pp. 41-42. https://doi.org/10.1108/eb029901Download as .RIS
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