Here's Al Cassel's Warrior, at the start of Transpac 73, which she won Class A in 11-22-15-40 (elapsed) and finished 9th overall...she rated 47.94 IOR
This is Equation. Designed by Britton for Jack Potter and built by Derecktor in Memareneck NY. It had a dagger-board-shaped keel that lifted hydraulically like a centerboard. The mizzen cocked and leeward spreader articulated for upwind work. I don't think that did much good, but look out when you cracked sheets: a rocket ship.