Hall Springfield Bulldog racer The Hall Springfield Bulldog racer was designed by John Hall after he left the Granvilles of GeeBee fame. It raced only once, in the 1932 Cleveland race and finished 6th because of engine problems. It was said to have reached a top speed of 270 knots. Your model will do about 240 knots and is set up slightly twitchy as was the real Bulldog.GMAX model by A.F.Scrub