121 1208Engineering Drawing I

Carry Prameswari

Program Studi Teknik PenerbanganFakultas Teknologi Kedirgantaraan

Universitas Dirgantara Marsekal Suryadarma

Topics

• Creating orthographic projection• Auxiliary view

Creating an Orthographic Projection

• Choose a front view. – Which view shows the most about the object?

C

Creating an Orthographic Projection

• Decide how many views are needed.– How many and which views?2FrontTop

For procedural reasons, we will continue this example by drawing all 3 standard views.

Creating an Orthographic Projection• Draw the

visible features of the front view.

Creating an Orthographic Projection• Draw

projectors off of the front view.

Creating an Orthographic Projection

• Draw the top view.

Creating an Orthographic Projection• Project back

to the front view.

Creating an Orthographic Projection• Draw a 45

projector off the front view.

Creating an Orthographic Projection• Draw

projectors over to the 45 line and down.

Creating an Orthographic Projection• Draw the

right side view.

Creating an Orthographic Projection• Project back

if needed.

Creating an Orthographic Projection• Draw

centerlines where necessary.

Creating an Orthographic Projection

Completed Drawing

Exercise

Draw three views of the following components in first angle projection. Show hidden detail when necessary. Use A4 paper, and give drawing title on each drawing. All dimensions are in (mm).

Auxiliary View

An auxiliary view is an orthographic view taken in such a manner that the lines of sight are not parallel to the principal projection planes (frontal, horizontal, or profile). There are an

infinite number of possible auxiliary views of any given object.

Auxiliary View

Auxiliary View

Exercise

• Draw the auxiliary view for this object.

Thank You