A 1/10 scale model airplane is to be used in a water flume to evaluate a 100 km/h landing of a full size plane. What should be the water flume velocity (m/s) assuming dynamic similarity is the determining factor? The water temperature in the flume is 20oC and the air temperature for the full size plane is -5 oC.

Data: Water density at 20oC = 998.2 kg/m3

Air density at -5 oC = 1.300 kg/m3

Viscosity of water at 20oC = 0.001 Pa.s

Viscosity of air at -5 oC = 0.00001689 Pa.s