First principles of mechanical and engineering drawing (1897)
Holt-Butterfill, H · London : Chapman & Hall · leaf 209
hown in full lines in No. 2, Fig. 196, keeping the axial lineAv a convenient distance from its base BC, in No. 1. Then to find thedevelopment of the surface required: in No. 3, Fig. 196, draw a line(indefinitely) at right angles to BC the base, and a projector from itsapex parallel to that base, to… … MECHANICAL AND ENGINEERING DRAWING 197 right and left in B and B, half the length of one edge of the baseof the pyramid, then the line BB will be the development of the edgeBB in No. 2. Join B and B with A by straight lines, then willthe triangle ABB be the development of the longest face of…
Mechanical drawing
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