Hybrid of Hart's A-frame and Chebyshev linkage
Hybrid of Hart's A-frame and Chebyshev linkage Hart's A-frame and Chebyshev linkage are very similar each other.
In Chebyshev linkage, sin(0.5 ∠BFD) + sin(0.5 ∠AED) ≒ constant is true. WHY? (IF you know Hart's A-frame, its fact is evident, maybe.) ■ CQ length calculation by another way from Hart's A-frame law, CQ×QD = DE×EA is true, so CQ = sqrt(DE×EA)=sqrt(1×5)=√5 (∵ CQ=QD)