2 Interpenetration of 2 Cylinders The drawing shows the part Plan and part Elevation of an interpenetration between two cylinders.Draw :-The completed ElevationThe completed PlanThe End Elevation
3 Drawing Generators on Plan and Elevation Divide the Elevation and Plan into 30o/60o parts and number each of the points.910/811/712/61/52/43Draw generators from these points on the Plan until they cut the main cylinder.11/110/2129/3Project the generators on the Elevation parallel to the angle of the sides of the small cylinder.8/47/56
4 Finding Points of Interpenetration Project points from Plan where generators cut the main cylinder.12/11/10/1298763/4/5Mark where each of the projected lines cross the appropriate generators on the Elevation with a small dot.1211/10/9/8/7/612345Draw a smooth curve through each of the points.This line of interpenetration can now be darkened.
5 Drawing Generators for End Elevation Find the position of the End Elevation.12/11/10/1298763/4/5Project the 12 points from the Plan onto the End Elevation.Number the points found on the End Elevation.1011121293876541211/10/9/8/7/612345
6 Finding Points of Interpenetration on End Elevation Project the points from the curve of interpenetration on the Elevation across to the End Elevation.12/11/10/1298763/4/5Mark where these lines cross the appropriate generator on the End Elevation with a small dot.9845673211211101211/10/9/8/7/612345Draw a smooth curve through each of the points.
7 Drawing End Ellipses of Small Cylinder Project the points where the generators on the Elevation cross the end of the small cylinder across to the End Elevation.12/11/10/1298763/4/5Where they cross the corresponding generators draw a small dot, and draw a smooth line through each.9845673211211101211/10/9/8/7/612345Do the same thing to find the curve on the Plan.
8 Finishing the DrawingTo finish the drawing each of the outlines should be darkened.Make sure that any hidden lines are identified when darkening the outlines.12/11/10/1298763/4/59845673211211101211/10/9/8/7/612345
9 The Final Drawing The final drawing should look like this. The construction lines have been removed to make the drawing easier to understand.