BY a coincidence, which is purely accidental, the same lesson is indicated in three separate articles published in this issue. The occurrence is rendered even more striking by the fact that the provenance of the articles is from such widely separated sources as Germany, America and England.
(1931), "The Efficiency of the Aeroplane: Reasons for Reconsidering Present Tendencies in Design", Aircraft Engineering and Aerospace Technology, Vol. 3 No. 9, pp. 211-212. https://doi.org/10.1108/eb029442
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