"Classic" Recurve Bow from Predator Custom Bows  

Manufacturer: Predator Custom Bows
P.O. Box 142
East Tawas, MI 48730
-USA-

Model:
Predator "Classic" Bow Specs:
Bow Length: 60 inches

Draw Weight: 50.5 lbs @ 28 inches

Recommended Brace Height: 7 1/4 inches - 7 3/4 inches

Physical Weight: 2 lbs 12 oz Test Results at 28" draw length:
Stored energy: 47.72 ft-lbs

Stored energy per pound of draw weight: 0.95 ft-lbs/lbs

Arrow weight: 454 grains

Arrow Speed: 198 fps   with mechanical release

Kinetic Energy of arrow: 39.53 ft-lbs

Dynamic efficiency: 82.8 %   (kinetic energy / stored energy)

Arrow Speed: 193 fps   with finger release

Testing Parameters:

A force-draw curve was obtained from the reviewed bow, using a digital force gauge with a resolution of 0.1 lbs. Measured draw weight @ 28 inches was rounded to the next half pound. 
The different arrow speeds were achieved with the bow shot from a shooting machine with a mechanical release and also hand held with finger release, using a "Crick-It" clicker and a deerskin glove. 
The string was pulled to 28" A.M.O. which is 26 1/4 " from the string to the deepest point of the grip. The (3) arrows for the speed testing had a weight of 9 grains per pound of measured (not stated) draw weight. A 16 strand flemish twist Fast-Flight string without any attachments (silencers, etc.) was used. 
Speed measurements were taken three feet in front of the back of the bow with two chronographs set up in a tandem configuration. Each arrow was shot a minimum of six times and the average speed was rounded to the next whole digit.