Originally Posted by
tcasblue
For the aircraft in question, the critical hydroplaning speeds with the required tyre pressure of 145 psi (pounds per square inch) are shown below:
Critical speed 1 = 8,6 x 145 = 103 kt
Critical speed 2 = 7,7 x 145 = 93 kt
I think your quote might have lost something in translation.
Presumably it's
Critical speed 1 = 8,6 x √
145 = 103 kt
Critical speed 2 = 7,7 x √
145 = 93 kt