Originally Posted by
Phamilton
Sorry to resurrect this now, I needed a few days to find time to research exactly what planing is supposed to mean. I think it's interesting and would be enjoy reading a discussion about it...
The frame having the "just right" flex to redirect the energy spent flexing it into forward motion. My unvarnished opinion with no "physics argument": "planing" is unfounded by mechanical explanations and at best psychological.