1. Solid Cylinder cut at an angle
Drawing Abilities Teacher
Solid Cylinder cut at an angle
© J Lewis 2004

2. Orthographic projection
Draw the Plan and Elevation of the cylinder, which is cut at an angle of 30 °
Plan
Elevation
© J Lewis 2004

3. Drawing generators
Divide the plan into 12 equal generators at 30 °, number these as shown
Plan
Elevation
© J Lewis 2004

4. Inserting reference points
Project the vertical generators down to the Elevation and number as shown
Elevation
© J Lewis 2004

5. Starting the End Elevation
Construct the outline of the End Elevation, point 3 at the front and the generators shown
Elevation
End Elevation
© J Lewis 2004

6. Drawing horizontal generators
Construct horizontals where the vertical generators cross the sloping top of the Elevation
Elevation
End Elevation
© J Lewis 2004

7. Marking out the shape
Now mark the End Elevation. Points are found where horizontal lines cross similar marked generators.
Elevation
End Elevation
© J Lewis 2004

8. Drawing the ellipse Draw an ellipse passing through the marked points
Elevation
End Elevation
© J Lewis 2004

9. Finished End Elevation
© J Lewis 2004

10. Surface Development
Project horizontals from the Elevation and step off to circumference length in 12 steps
Elevation
© J Lewis 2004

11. Marking points Mark the reference points carefully as shown below
Elevation
© J Lewis 2004

12. Joining the points Join the points with a smooth curve Elevation
© J Lewis 2004

13. Finished Surface Development
Plan
Surface Development
Elevation
© J Lewis 2004

14. Dealing with Cones Cones are dealt with in a similar way to cylinders
The Plan and Elevation of the cone, which is cut at an angle of 30 ° by the plane A – A are shown below
© J Lewis 2004

15. Drawing generators
Divide the Plan into 12 equal generators at 30 °, number these as shown
© J Lewis 2004

16. Inserting reference points
Project the vertical generators down to the Elevation and number as shown
© J Lewis 2004

17. Drawing Surface Generators
Draw surface generators as shown
© J Lewis 2004

18. Starting the End Elevation
Construct the outline of the End Elevation, point 3 at the front and the generators shown
Elevation
End Elevation
© J Lewis 2004

19. Starting the End Elevation
Construct surface generators on the End Elevation as shown
Elevation
End Elevation
© J Lewis 2004

20. Drawing the End Elevation
Construct horizontals as shown
Elevation
End Elevation
© J Lewis 2004

21. Drawing the End Elevation
Draw a smooth curve as shown on the End Elevation
End Elevation
© J Lewis 2004

22. Starting the Plan
Construct the lines shown from the Elevation up to the Plan
Plan
Elevation
© J Lewis 2004

23. Completing the Plan
Transfer the measurement on 6 – 12 on the End Elevation to the same generator
on the Plan and draw a smooth curve as shown.
Plan
End Elevation
Elevation
© J Lewis 2004

24. Finished Orthographic Projection
© J Lewis 2004

25. Surface Development
Step off to circumference length in 12 steps along an arc with the same radius as generator 3 as shown – this is a true length of side
Mark off the true lengths of each of the generators as shown and draw the surface development
Elevation
© J Lewis 2004