Originally Posted by
choddo
Can just about read that. A higher quality image would have helped.
Yes, it's a mess (and a day late).
Originally Posted by
choddo
What’s the definition of the “effective radius” there? Cos based on the image alone it’s “distance from hub to an arbritrary dotted line”. Does PC=CA? And if so, why?
The "effective" radius is the radius for horizontal travel with a full wheel rotation. It's the radius "you want". Exactly what the value of that radius is is complicated (and it varies).
Originally Posted by
choddo
Cos based on the image alone it’s “distance from hub to an arbritrary dotted line”. Does PC=CA? And if so, why?
These distances vary depending on a bunch of things. The image isn't saying PC=CA. It's just showing the spatial relationships of these things (not their sizes).