Yellow Jacket - By William D. Jackson. Water speedometer tesfs show this "hof rod" speadboat will do 39 mph wifh a Class A motor, 45 mph with a Class B. “Lets try one that will really give 'em some speed, Bill, and will also quality to: Class A racing." That was the editor talking and, since I like to be obliging, here's just what he and a 102 of ynu_readers requested. Yellow Jacket weighs 100 pounds lakeside, not including steering wheel, fin and throttle controls, and this brings it within the Class A racing requirements of a minimum 100 lb. hull weight. Also, to qualify for Class A racing, Yellow Jacket. must be used with an outboard motor with a piston displacement of over 10 but not over 15 cu. inches. As for performance, we really tested this racing hydroplane with a Truspeed 0-50 mph water speedometer, and she proved to be a mighty hot little number...