RCU Forums - Wing loading ?

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Gary L.

06-22-2007 04:47 PM

Wing loading ?

I know I have seen it here some where, but caint find it. How do you get the wing loading , what times what ?
Thanks.

da Rock

06-22-2007 06:04 PM

RE: Wing loading ?

In our models it's often described in ounces/sq foot.

Take the area of the wing in square inches and divide that by 144. You now have the area of the model in square feet.
Take the weight of the airplane in ounces.
Divide the weight by the area.

The Fling 2M glider reviewed recently in R/C Report weighed 22.3 ounces. It's wing area was 477 sq.in. which would be 3.3 sq.ft.
22.3 / 3.3 = 6.75 oz/sq.ft.

Gary L.

06-22-2007 06:17 PM

RE: Wing loading ?

Thanks Rock.

Campy

06-23-2007 09:07 AM

RE: Wing loading ?

You can also go here and use the calculator.

http://www.csd.net/~cgadd/eflight/calcs_wingload.htm

Cyclic_ Hardover

06-23-2007 11:52 AM

RE: Wing loading ?

Quote:

ORIGINAL: da Rock

In our models it's often described in ounces/sq foot.

Take the area of the wing in square inches and divide that by 144. You now have the area of the model in square feet.
Take the weight of the airplane in ounces.
Divide the weight by the area.

The Fling 2M glider reviewed recently in R/C Report weighed 22.3 ounces. It's wing area was 477 sq.in. which would be 3.3 sq.ft.
22.3 / 3.3 = 6.75 oz/sq.ft.

To give you a ballpark area, that 6.75 basically means its a "floater" obviously. My prop jets are on the 30's which means it drops like a brick when the power is cut off.

B.L.E.

06-23-2007 12:26 PM

RE: Wing loading ?

A low wing loading doesn't garrantee that your plane is a floater. See how far an electric foamy indoor plane glides without power. On the other hand, sailplanes can have surprisingly high wing loadings as long as the drag is low, permitting high speed flight without a lot of energy loss.

Cyclic_ Hardover

06-23-2007 02:25 PM

RE: Wing loading ?

Well yeh, if I let go of a paper airplane without a little bit of a toss, am I going to expect it to takeoff or fall to the ground. I'm just telling him the blunt difference between the two.

Gary L.

06-23-2007 08:16 PM

RE: Wing loading ?

Thanks guys, It was something I thought I could use in the future.

bruce88123

06-23-2007 09:32 PM

RE: Wing loading ?

Most bi-planes actually have fairly good wing loadings but glide like bricks dragging anchors. So much "frontal area" to create drag.

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