Hi Geo !
Exactly, but in the description I gave I tried to simplify variables to keep it (relatively) easy to understand the differences in how the mid section rail is working to influence the characteristics at marginal planing thresholds of two otherwise similar outline boards (which was basically a main component of the discussion).
No question at all the rail around the tail is basically always fully engaged, but here too you find a lot less variance between new vs older rail profiles and tuck for that reason.
Rails in the mid section (as discussed) are a lot less engaged (by length) on short wide outlines than they are by length on long narrow. Again this is a major over simplification to convey as practically as possible the subtle design variances as they apply to the primary discussion iS96 vs S100 planing variances.
Cheers ~ Ian
Last edited by Ian Fox; 29th October 2007 at 06:41 PM.