Technical Drawing - Exam Papers - Ordinary - 1999 - Paper 1

Question 4

The elevation and plan of a cylinder with three points, A, B and P on its surface are shown in Fig. 4.

(a) Show on the elevation of the cylinder the path of a helix which starts at the given point P and moves to the top of the cylinder in one revolution.
(b) Draw the elevation of another helix which passes through the given points A and B.