Reynolds number is equal to density times length times velocity divided by viscosity. In my previous post I erred by not taking into acount the difference in viscosity between air and water and by getting the ratio of densities wrong. Air, in a standard atmosphere, has a viscosity about 50 times smaller than water. Water is about 800 times denser than air. The velocity-length products will be in the ratio of about 16:1 from air to water at the same reynolds number. That is, the product of length times velocity in air will be about 16 times greater than in water for the same reynolds number.

I hope I got it right this time.