AS petrol and oil tanks necessitating some very irregular shapes have to be carried in various parts of an aeroplane, it is necessary to apply either Simpson's Rules or use a planimeter to obtain their capacity when drawing them out on the board. The writer has taken a few examples of tanks to be found in an aeroplane with a view to explaining their application.
Haley, R. (1933), "Laying Out Tanks: Practical Notes on Drawing Office Practice for the Junior Draughtsman", Aircraft Engineering and Aerospace Technology, Vol. 5 No. 1, pp. 19-20. https://doi.org/10.1108/eb029647
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