Wing Volume Loading formula
Generally speaking, the lower the number the "better".

WVLs between 8 to 9 are "great" for aerobatics, 9 to 10 are acceptable for
aerobatics (my rule of thumb but not in stone).

10 - 12 are good for sport planes.

12 - 14 are ok for heavy metal warbird planes (scale in general probably).

4 to 6 are for sailplanes.


numerator = weight in ounces

denominator = wing area in square feet raised to the 1.5 power

This is the way I was told to do it.

Divide the wing area by 144 (assuming wing area is only known in square
inches) and write that number down and label it A for area.

Clear the calculator and then find the key labeled x^y on the calculator
(microsoft's calculator will show you this key only if you put it into
scientific view).

Put in the A number, hit the x^y key once, put in 1.5 hit the x^y key once
again.

Write that number down too and let's call it the D number.

Clear the calculator again.

Divide the number "16" by the D number, write down the answer and call it
the N number.

Now take the weight of the plane (or any weight you want to use) in pounds
and multipy the N number by it.

Experiment with different weights to see how light or heavy you can go to get your plane in the 8 to 10 category (less is better).