Question

You are designing a ping pong ball launcher using 1 1/2 " pvc pipe as a launch tube. The diameter of a professional grade ping pong ball is 40+/- 0.5 mm. Schedule 40 pvc pipe actually has an inside nominal diameter of 1.610 inches. Using the convention: X is /- .1 inch ; .XX is +/ .01 inch and XXX is +/-.005 inches, what is the minimum clearance we should have between the ping pong ball and the inside of the pvc pipe in mm?

Answer 1

G-3 2.6 mm is 'the elearance. minim um ball and