The naval architect's and shipbuilder's pocket-book of formulae, rules, and tables and marine engineer's and surveyor's handy book of reference (1884)
Mackrow, Clement · London, C. Lockwood and co. · leaf 203
resent toscale the various speeds at which the thrust was taken, a curvebent through the ends of the ordinates will form part of a thrustcurve. Let^^ be the lowest point found for the curve ; at the pointp draw the tangent pj); draw the vertical at h so as to cut thespace oy into segments, making… … ^aHer ofj^peed.inKnalrS^ the vertical hcuts the tangent jjj?:the vertical height D be-tween the parallel lineand the base will repre-sent the constant frictionof the engine, and itwill also be the heightof the vertex of the thrustcurve at the origin of thespeed scale, which canthus be completed…
