Aberdeen grammar school l.jpg
This presentation is the property of its rightful owner.
Sponsored Links
1 / 17

Aberdeen Grammar School PowerPoint PPT Presentation


  • 82 Views
  • Uploaded on
  • Presentation posted in: General

Aberdeen Grammar School. Graphic Communication. True Shapes The Cylinder. CDT Department . True Shape. This type of drawing is asked to be drawn as part of a cut, prism, pyramid, cylinder or cone. It shows the actual shape of a sloping surface.

Download Presentation

Aberdeen Grammar School

An Image/Link below is provided (as is) to download presentation

Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author.While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server.


- - - - - - - - - - - - - - - - - - - - - - - - - - E N D - - - - - - - - - - - - - - - - - - - - - - - - - -

Presentation Transcript


Aberdeen grammar school l.jpg

Aberdeen Grammar School

Graphic Communication

True Shapes

The Cylinder

CDT Department


True shape l.jpg

True Shape

  • This type of drawing is asked to be drawn as part of a cut, prism, pyramid, cylinder or cone.

  • It shows the actual shape of a sloping surface.

  • They can be quite confusing but are not as hard to produce as they look.


True shape3 l.jpg

True Shape

  • As there are other slides and presentations depicting how to draw cut prisms, pyramids, cylinders and cones we are not going to show you how to do these things in this slideshow.

  • Instead we will focus on producing the true shapes.


True shape cylinders l.jpg

True Shape - Cylinders

Here we will draw the true shape of the sloping surface.


True shape5 l.jpg

True Shape

Draw 2 lines at 90° to the cut from the bottom and top of the cut.


True shape6 l.jpg

True Shape

Construct a clockface on the plan.


True shape7 l.jpg

True Shape

Construct a clockface on the plan.


True shape8 l.jpg

12

11

1

2

10

9

3

8

4

5

7

6

True Shape

Number the clockface on the plan.


True shape9 l.jpg

This centre line must be parallel with the sloping face on the elevation.

True Shape

12

11

1

2

10

9

3

8

4

5

7

6

Add a centre line at 90° to these two lines. Draw this centre line clear of all the other views to make the true shape clearer.


True shape10 l.jpg

True Shape

12

11

1

2

10

9

3

8

4

5

7

6

Now project the lines down from each of the clock points on the plan.


True shape11 l.jpg

True Shape

12

11

1

2

10

9

3

8

4

5

7

Ignore any of these lines that do not travel through the cut face of the cone. These are shown pink.

6


True shape12 l.jpg

True Shape

12

11

1

2

10

9

3

8

4

5

7

6

Project these projection lines at 90° to the cut line on the elevation.


True shape13 l.jpg

11

True Shape

Number the corners to stop you getting confused.

12

7

11

1

2

10

9

3

Use a compass to transfer the distances from the centre line to the clock face.

8

4

5

7

6

Distances from the centre line to point 11 and point 7 are the same so can be marked on at the same time.


True shape14 l.jpg

11

12

True Shape

1

12

7

11

1

2

2

10

6

3

5

9

3

4

8

4

5

7

6

Repeat for all the points.


True shape15 l.jpg

11

12

True Shape

1

12

7

11

1

2

2

10

6

3

5

9

3

4

8

4

Draw a smooth freehand curve joining these points.

5

7

6

Now join points 7 and 11 with a straight line.


True shape16 l.jpg

True Shape

12

11

1

2

10

9

3

8

4

5

7

Here the true shape is shown more clearly.

6


  • Login