Excellent site. Tons of info and pics. A VERY GOOD site!!!

Thanks Tom!!!

I have another way to calculate wing area, altho I am sure it's not as accurate. Much less math, but you need scales.

Cut a piece of thin cardboard exactly 1 inch x 1 inch.

Weigh it.

Trace the outline of your wing onto the same cardboard and cut it out.

Weigh it. Divide that by the number that you got for 1 square inch of cardboard.

Poster board works well also.

For example,:

If one square inch weighs 1 gram...

If the outline of your wing weighs 16 grams...

you would divide 1 gram [the square inch] into 16 grams [the wing outline] and you get 16 square inches of wing area.

Exaggerated numbers, I know, but you get the point.

To further this, if you want to know if your plane is "heavy"'

Divide your planes wing area in half and that will tell you how many grams it should weigh.

The above example should have an "all up" weight of 8 grams.

Most of mine are "heavy".

The half a gram per square inch thing is NOT cast in stone. Alot depends on other factors, like wing design, frontal area, drag, indoor or outdoor, ect. But it will get you in the ball park for rubber free flight. I have had planes at 6.5 grams fly outside, and some peoples indoor planes come in around 4 grams or less.

Weight and wing area are a great topic for discussion.

Does anybody have any thoughts on the subject?