Re: Vulcan Limit
I still had 300fpm climb rate at FL550 going over a line of thunderstorms which lay between the Great Lakes and Florida en route Offutt to Goose. The ac would probably reach in the order of FL600 before the roc reduced to 100fpm [at a guess].
It was only 27 Sqn who wore the special pressure kit whilst on spec ops, although quite a few ac were fitted with the Mk21 regulator.