Method Three: Horizontal Sections (Leaving Cert DCG): Flashcards
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10 cards from this deck
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Practise the cards
10 cards from this deck
Horizontal sections method purpose
Horizontal sections method purpose
Finding where solids intersect, especially curved shapes
3 shapes best suited for horizontal sections
3 shapes best suited for horizontal sections
Spheres, cones, and cylinders
Why horizontal sections work with these shapes
Why horizontal sections work with these shapes
They produce circular cross-sections when cut horizontally
Key principle of horizontal sections method
Key principle of horizontal sections method
Converts 3D intersection into 2D circle intersection problems
Step 1 of horizontal sections procedure
Step 1 of horizontal sections procedure
Draw the plan and elevation views of both solids
How to position horizontal cutting planes
How to position horizontal cutting planes
Space at equal intervals on both sides of centre line
Typical number of horizontal sections needed
Typical number of horizontal sections needed
4-6 sections on each side
Where to find intersection points (which view)
Where to find intersection points (which view)
In plan view where circular sections cross
Step 4: How to transfer points to elevation
Step 4: How to transfer points to elevation
Project vertically to corresponding section line
Effect of using more horizontal sections
Effect of using more horizontal sections
Smoother and more accurate final curve