ORIGINAL: 454
There are prop planes out there that do 200 or better why are turbines limited to 200
IMO, it's because
(a) Dave Brown is a Moron. Thank god he's gone. FWIW, Dave Mathewson has indicated that for topics like the speed limit he'd listen to his experts - such as the JPO - rather than be pig-headed like Brown was.
(b) The JPO was only ever interested in pushing for HEAVIER models, not faster ones.
Gordon