Structural analysis and design of airplanes (1920)
United States. Army. Air Corps · [Washington] · leaf 263
odetermine them. They all tend to make the three resultant forces morenearly perpendicular to the line of propeller thrust than the verticalforces Nc, Nts and W are. The assumption sometimes made is thatthese ratios are the same and equal to the tangent of the angle a betweenthe ground and the line… … alue. Fig. 165. Reactions in Three Point Landing The true value is somewhere between the two. As the directions of theresultant forces are unknown, and as the assumption that they are per-pendicular to the line of propeller thrust gives loads that are on theunsafe side, it is recommended that the…
Airplanes
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