4.4 Aircraft Related Drawing: Orthographi c Projection

• Principles of orthographic projection: projection of views, use of projection planes, alignment of views, scaling and proportion
• Methods of orthographic projection: first angle and third angle
• Drawing orthographic projections of aircraft components: wing, fuselage, fairing, fasteners and bracket
• Dimensioning orthographic projection drawings in aircraft construction
• Interpreting aircraft component drawings in orthographic projection
• The value of drawing interpretation in aircraft construction

• explain the principles of orthographic projection in aircraft drawing
• describe the methods of orthographic projection in drawing
• draw orthographic projections of aircraft components
• dimension orthographic projection drawings in aircraft construction
• interpret aircraft component drawings in orthographic projection
• recognise the value of drawing interpretation in aircraft construction

“How are orthographic projection drawings used in the aviation field?”

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1. Orthographic projection
   40 min · 1 practice tasks · quiz
   Introduce orthographic projection and the key inquiry question.
2. Principles of orthographic projection
   40 min · 1 practice tasks · quiz
   Explain the principles that make an orthographic projection work.
3. Projection planes and the three views
   40 min · 1 practice tasks · quiz
   Explain how the three projection planes carry the front, top and side views.
4. First angle projection
   40 min · 1 practice tasks · quiz
   Describe the first angle method of orthographic projection.
5. Third angle projection
   40 min · 1 practice tasks · quiz
   Describe the third angle method of orthographic projection.
6. Aligning and laying out the views
   40 min · 1 practice tasks · quiz
   Explain how the views are aligned and arranged on the drawing sheet.
7. Scaling and proportion
   40 min · 1 practice tasks · quiz
   Explain scale and proportion in aircraft drawings.
8. Steps in drawing an aircraft component
   40 min · 1 practice tasks · quiz
   Describe the steps followed when drawing a component in orthographic projection.
9. Drawing a wing
   40 min · 1 practice tasks · quiz
   Draw and interpret the orthographic views of a wing.
10. Drawing a fuselage and fairing
    40 min · 1 practice tasks · quiz
    Draw and interpret the orthographic views of a fuselage or fairing.
11. Drawing a bracket and fasteners
    40 min · 1 practice tasks · quiz
    Draw and interpret the orthographic views of a bracket and a fastener.
12. Dimensioning orthographic drawings
    40 min · 1 practice tasks · quiz
    Explain how to add dimensions to an orthographic drawing.
13. Interpreting aircraft drawings
    40 min · 1 practice tasks · quiz
    Interpret an aircraft component drawing in orthographic projection and value it.