This command fits a curve between two tangent lines and a known middle ordinate. It prompts for the middle ordinate length, the Point of Intersection and points on the two tangent lines.
Middle
Ordinate <50.00>:
press Enter
[int on] Pick P.I. of curve: pick
a
point
[nea on] Pick Point on 1st Tangent
Line: pick a point
[nea on] Pick Point on 2nd Tangent
Line: pick a point
Pulldown Menu Location: Draw >
Arc
Keyboard Command: 2tanlmo
Prerequisite: Tangent lines should be drawn before execution
File Name: \lsp\2tanlmo.lsp