← 2.4 Blending of lines and curves
Internal blend of two circles
Power Mechanics · Grade 10 · about 40 minutes
An internal blend is a reverse curve between two circles. Loci are |R-r1| and |R-r2|; the arc cups into the gap like a waist.
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- 7 sections of explanation, worked examples and diagrams
- 1 practice task with hints and worked answers
- A quiz that marks itself as you go
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Other lessons in this sub-strand
- Blending of lines and curves
- What blending means
- The tangent and the radius-R rule
- Locating the tangent points
- Blending two straight lines
- Constructing a rounded corner
- Blending a line and a circle
- Internal and external blends
- External blend of two circles
- Internal blend of two circles
- Blending two equal circles
- Fillets and rounds on vehicle parts
- Constructing a hook
- Constructing a spanner outline
- Vehicle shapes with blending
- Why blending of lines and curves matters