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)