Science and art drawing : complete geometrical course ; consisting of plane and solid geometry, orthographic and isometric projection, projection of shadow's the principles of map projection, graphic arithmetic and graphic statics (1895)
Spanton, J. Humphrey (John Humphrey) · London : Macmillan · leaf 586
that of the sum of the twoforces P and P acting at the points B and C. Hence it is seenthat the torsional value of the couple is equal to the moment ofone of the forces about the other end of the arm of the couple,i.e. the product of P and BC. To show graphically the amount of the torsional value… … 566 SOLID GEOMETRY dicular at c in r. Then cr = BC x V, he = the unit (Prob. 256).With A as centre, and radius equal to cr, draw the circle E, theradius of which expresses the torsional value of the couple PPin lbs. The moment of the forces constituting any couple cibout anypoint in the plane is…
Geometrical drawing
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