Wing volume loading
07-08-2002 | 09:55 PM
#2
My Feedback: (2)
Wing volume loading
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).
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).
07-08-2002 | 11:03 PM
#3
Thread Starter
My Feedback: (1)
work it out!
BIg Thanks
Did not know how to work out the power 1.5 thing !
Took a little wile working with scientific calc .// You spelled it out perfectly !
What I new turned out That I gotta shave 1 lb to to get to
10 /// To get good aerobatics ! I think 8 0z won't be to bad to do,, but a full lb will require some work! I take it by aerobatic you include 3d capable aircraft also 3d //// ??? I DO have enough
THRUST @ 28+lbs
Good flyin Ron
Did not know how to work out the power 1.5 thing !
Took a little wile working with scientific calc .// You spelled it out perfectly !
What I new turned out That I gotta shave 1 lb to to get to
10 /// To get good aerobatics ! I think 8 0z won't be to bad to do,, but a full lb will require some work! I take it by aerobatic you include 3d capable aircraft also 3d //// ??? I DO have enough
THRUST @ 28+lbs
Good flyin Ron
07-08-2002 | 11:16 PM
#4
Senior Member
Wing volume loading
rctt, don't put too much faith in this, it's good for a general base line but by no means is it the law. There are many other things that have even greater effect on how a plane flies that it doesn't take into consideration. For instance, airfoil thickness and shape, aspect ratio, CG size of the control surfaces, and the list goes on. Keep it as light as you can and go have fun.
