Calculating Aerodynamic Power for Flying a Plane

[NegDee]

Homework Statement

aerodynamics question. Power P to fly a plane.
Has P = Mass 3/2 do not know if this means square M by 3/2? that is how i take it to be then you divide this by √S which is cross section of wing.

figures are M = 124.6kg 3/2 divided by S = √ 36m Squared
solution comes up with M 1389/S 6m = 231.5kg m to power of -1
I do not know how to get to figure of 1389?

Homework Equations

The Attempt at a Solution

 

[gneill]

Homework Statement

aerodynamics question. Power p to fly a plane.
Has p = mass 3/2 do not know if this means square m by 3/2? That is how i take it to be then you divide this by √s which is cross section of wing.

Figures are m = 124.6kg 3/2 divided by s = √ 36m squared
solution comes up with m 1389/s 6m = 231.5kg m to power of -1
i do not know how to get to figure of 1389?

(124.6)^(3/2) ≈ 1391

If the author used logs with only a few decimal places, or a slide rule, to work out the answer it could have ended up as 1389. Is this example from a book? If so, what's the date of publication?