If you are flying tru some clouds/turbulence, would you fly according to your Va / Vra or the Max Turbulence Speed? As what I know Va is less then Max Turbulence. Speed and practical wise..
Type Specific; 737 Classic = 0.73 / 280kts, keep it above the green dot!!!!
And ya the Hydroplanning speed formula = 9 (square root) of the tyre PSI.. which tyre should we take.. the nose wheel or the main wheel? Because clearly some airplane has difference PSI setting for each tyres.
I believe it is the Main Gear, but I may be wrong!!