AMONG the various elements which condition heavier‐than‐air flight, speed is well known to be one of those which most deserve attention because of its fundamental effect on sustentation and on safety and economy.
Dupuy, C.P. (1931), "Aeroplane Speed Characteristics: An Attempt to Elucidate Theory in Practical Terms for the Aeroplane Pilot", Aircraft Engineering and Aerospace Technology, Vol. 3 No. 8, pp. 187-190. https://doi.org/10.1108/eb029432
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