Hutton, Frederick Remsen, 1853-1918 · New York, J. Wiley & sons; London, Chapman & Hall, limited · leaf 744
in the circumference of a circle the co-ordinates of whose centre APPENDIX. 685 are OB— a — - and BC= b — -, and whose diameter is r. For if P% be 2 2 any point whose radius vector is OP* and the angle MOP = a?, then if OM — £ cos go,and J//* = ^ sin wit can be proved that CN* + NP*1 = CP* = ( OM-… … Fig. 510. 2a = A and lb = i?,£ = A cos go 4- -# sin co.Or in other words, the motion of the valve from its central position may berepresented by, or replaced by, the length of the radius vector of a polarcircle, whose diameter is the throw of the valve. The radius vector whengo is zero determines…
Mechanical engineering · Steam power plants
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