How to Calculate Wing Loading
In this example, we will use an aircraft weighing
51/2 lbs (5 lbs 8 oz.) with 600 square inches of wing area. Calculating the wing loading requires that the
wing area be converted to square feet (ft^{2}) and pounds to ounces.
1) Convert the area to square feet.
There are 144 (12 x 12) square inches in a square foot.
600 in^{2} ÷ 144 = 4.17 ft^{2}
2) Convert the total empty weight
(readytofly with no fuel) to ounces. There are 16 ounces in a pound.
5.5 lbs x 16 = 88 oz.
3) Divide the weight by the area:
88 oz. ÷ 4.17 ft^{2} = 21.1 oz./ft^{2}
Using round numbers, this gives the aircraft a
wingloading of 21 oz./ft^{2} or
You can perform the entire calculation in one
shot using simple substitution:
(Weight x 2304) ÷ Wing Area
Where weight is in pounds and wing area is in square inches
Plugging the numbers from this example into the
above formula gives us this:
( 5.5 x 2304 ) ÷ 600 = 21.1 oz./ft^{2}
For multiwing aircraft, divide the overall weight of the aircraft by the
total wing area for all wings.
