THE need for providing means which will enable a pilot to fly and land an aeroplane in fog arises from the fact that aeroplanes depend for their sustentation on translational motion. If a satisfactory helicopter were evolved, fog would merely cause inconvenience and delay instead of constituting a grave danger, as it does to conventional types of aeroplanes.
Rowe, A.P. (1929), "Flying and Landing in Fog: Science as an Aid to Aerial Navigation Materially Reduces the Risk of Casualty and Irregularity", Aircraft Engineering and Aerospace Technology, Vol. 1 No. 5, pp. 169-172. https://doi.org/10.1108/eb029148
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