THE use of the variable‐pitch airscrew has to‐day become commonplace. Its wide application permits certain facts derived from experience to be postulated and leads to new development problems.
Schmidt, K.A. (1940), "The Bases of V.P. Airscrew Design: Fundamental Problems, with Particular Reference to the Principal German Types", Aircraft Engineering and Aerospace Technology, Vol. 12 No. 8, pp. 233-236. https://doi.org/10.1108/eb030675
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