SOME details have now been released of the dc Havilland all‐metal four‐bladed airscrew. The first of the scries was of a size to suit engines of 2,000 h.p. and higher, the biggest the R.A.F. is using at present. This has a maximum diameter of 16 ft. Other sizes are being built covering the range of operational horse‐powers.
(1942), "The D.H. Four‐Bladed Airscrew: Drawings, With a Brief Description, showing the Principal Features of the New Development", Aircraft Engineering and Aerospace Technology, Vol. 14 No. 1, pp. 14-16. https://doi.org/10.1108/eb030861
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