2.3 Aircraft Related Drawing: Orthographic Projection

• Aircraft related drawing: purpose and types of technical drawings
• Drawing instruments, materials and their safe use
• Line conventions, lettering and symbols in aircraft drawing
• Principles of orthographic projection: projection of views
• Use of projection planes: horizontal, vertical and profile planes
• Alignment of views and layout of orthographic drawings
• Scaling and proportion in aircraft drawings
• Methods of orthographic projection: first angle and third angle
• Steps in drawing aircraft components in orthographic projection
• Freehand sketching of aircraft components
• Orthographic projection of aircraft components: wing, fuselage, fairing, fasteners and brackets
• Dimensioning orthographic projection drawings
• Interpreting aircraft component drawings in orthographic projection

• 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
• recognize the value of drawing interpretation in aircraft construction

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

“Why are several views drawn instead of one picture of a part?”

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1. Aircraft related drawing
   40 min · 1 practice tasks · quiz
   Explain what aircraft related drawing is and why it is used.
2. Drawing instruments and materials
   40 min · 1 practice tasks · quiz
   Identify drawing instruments and materials and use them safely.
3. Lines and lettering in aircraft drawing
   40 min · 1 practice tasks · quiz
   Use the correct lines, lettering and symbols in aircraft drawing.
4. What orthographic projection is
   40 min · 1 practice tasks · quiz
   Explain the meaning and purpose of orthographic projection.
5. The projection planes
   40 min · 1 practice tasks · quiz
   Describe the horizontal, vertical and profile projection planes.
6. Projection of views
   40 min · 1 practice tasks · quiz
   Explain how the principal views are projected and what each shows.
7. Alignment of views
   40 min · 1 practice tasks · quiz
   Explain how the views are aligned and laid out on a drawing sheet.
8. First angle projection
   40 min · 1 practice tasks · quiz
   Describe first angle projection and draw views by this method.
9. Third angle projection
   40 min · 1 practice tasks · quiz
   Describe third angle projection and draw views by this method.
10. Comparing first and third angle
    40 min · 1 practice tasks · quiz
    Compare the two methods of orthographic projection.
11. Scaling and proportion
    40 min · 1 practice tasks · quiz
    Use scale and proportion correctly in aircraft drawings.
12. Freehand sketching
    40 min · 1 practice tasks · quiz
    Sketch aircraft components freehand in orthographic projection.
13. Steps in drawing a component
    40 min · 1 practice tasks · quiz
    Follow the steps to draw an aircraft component in orthographic projection.
14. Drawing a wing
    40 min · 1 practice tasks · quiz
    Draw the orthographic views of a wing.
15. Drawing a fuselage
    40 min · 1 practice tasks · quiz
    Draw the orthographic views of a fuselage.
16. Drawing a fairing
    40 min · 1 practice tasks · quiz
    Draw the orthographic views of a fairing.
17. Drawing a fastener
    40 min · 1 practice tasks · quiz
    Draw the orthographic views of a fastener such as a bolt.
18. Drawing a bracket
    40 min · 1 practice tasks · quiz
    Draw the orthographic views of a bracket.
19. Dimensioning drawings
    40 min · 1 practice tasks · quiz
    Add dimensions to orthographic drawings correctly.
20. Tolerances and fits
    40 min · 1 practice tasks · quiz
    Add limits and tolerances to aircraft dimensions.
21. Interpreting aircraft drawings
    40 min · 1 practice tasks · quiz
    Read and interpret aircraft component drawings.
22. Value of drawing interpretation
    40 min · 1 practice tasks · quiz
    Explain the value of drawing interpretation in aircraft construction.