MacDonald, Alexander Forsyth, 1897-1965 · Port Credit, Ont. : Aviation Service Corporation · leaf 79
4. Draw any line A-Y inclined to A-B and mark offA-C egual to X-H, and C-D equal to X-O. 5. Join D to B. Through C draw a line parallel to D-Bcutting A-B at P. P is the Critical Point, or Point of No Return. It is162 n.miles from A. 6. With centre W and radius 250 kts. (the TrueAirspeed) describe… … Fig. E. Radius of Action. POINT OF NO RETURN On long flights over oceans, jungle, or featurelesscountry such as the Arctic, there is a position some-where along the route from which it is equally quickto fly to the point ahead or return to the starting point.This is called the CRITICAL POINT or…
Airplanes
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