Minimum wing area, wing thickness, fuse height, fuse width, etc. is to make every one feel like they are competitive. Your wing area to displacement formula looks well thought out, I assume by trail and error and pass experience. Do I want to run against a guy setting in his garage with more time than I've got to build a one off with supper thin wings, and fuse, etc. ?? May be I'm just missing the break out time thing or something. Do you just make sure you have a plane than can run faster than the class ( bronze, silver, gold break out time ) and just try and run as close as possible to this time?? May be some one can do a write up on the strategy for War Bird racing.

Jerry