Author Topic: Using Visio to animate Walchaert's valve gear on my Choo-Choo  (Read 319 times)

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cliff50

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Using Visio to animate Walchaert's valve gear on my Choo-Choo
« on: September 16, 2018, 05:32:06 PM »
the eccentric rod and constant length rotations thereabout, are hard coded in the shape sheet cells.
So far I am using sheet references that lead all the way back to the main drive wheel's angular rotation.
Then coded in VB to rotate the main drive wheel.

I found the expression for calculating angular movement within a scalene triangle -> Cos(theta) =( A^2 + B^2-C^2)/(2 x A x B)
to be helpful for the minute.
 (work in progress).

on menu press "forward"."reverse" "stop"
 ;)

cheers
Cliff