I developed a lot of technology for competition in the mid 1980s. This boomerang was developed for the Fast Catch event. The design is based on a Fast Catch boomerang that Peter Ruhf gave to me in 1985. Several of the New England competitors were using similar designs. I constructed this one out of 5 mm Baltic Birch plywood in 1986. There is significant camber on the underside of both blades. This increases the lift on the airfoils. It also reduces the rotational inertia allowing for a much faster turn. This is perhaps the fastest Fast Catch that I ever made. I could do 20 seconds or less for a round of 5 under ideal conditions. It was such a good flyer that I put a star under my logo on the reverse and wrote "keep". It became a valuable master copy and I have not throw it for 38 years. It is in mint condition.