The formula for hydroplanning speed [and the effects of slush on acceleration] was derived from a Convair 880 and a Boeing 707 from trials conducted in Florida's NASA Dryden research center conducted in August 1961
[how'd they get slush in August in Florida---I have no clue
]
note there's no formula for slush effects but the syntax implies that I meant so; I meant the trials also studied the effects of slush were conducted,...
PA