FTW: ..."my opinion is lodged in a rotting old brain"

Come on Frank, this is obviously a ploy for sympathy which is quickly disregarded for those of us who lived through the 1960s

On another note I googled James Annan as menioned by BenCooper and found multiple sites with tons of info and discussion on bicycle forks and disc brakes which are linked below. If you have any questions regarding safety/forks/discs its likey covered somewhere in the link info.

http://www.ne.jp/asahi/julesandjames...quick_release/
http://yarchive.net/bike/disk_brake_qr.html

Most of the discussions/info deal with the forces generated by the disc brake forcing the wheel/axle down and out of the dropouts(yes, even with lawyer lips), and not much on the blade "unraking"(at least in my reading on the subject offered in the links). In no way am I implying fork unraking doesn't happen, only that the analysis in the links focuses on wheel/axle ejection.

here's some testing Cannondale did with analysis of the testing by others(10yrs past):
http://www.ne.jp/asahi/julesandjames...annondale.html

At this point my thinking is radiused blades and disc brakes are not a wise choice, as several of you have pointed out(more than once), and I won't be building one.

cheers, Brian