Bruce, first off a "flattie" hull can mean many different things considering how many varieties there are. The fastest flatties are runnerbottoms and have pushed up on 180 mph, but many have crashed much slower. The non runnerbottom circle hulls have been proven at just a tick over 150 and according to some team claims (which aren't verified) upper 150's. Again many have crashed much slower. So, with all conditions and factors perfect one can figure the best runnerbottom right around 180 and the best circle flat low 150's until these marks are raised.
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