steadykev
Junior Pilot
.....of course it`ll fly....
Posts: 166 
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Post by steadykev on Jan 14, 2014 17:25:29 GMT
Hello everyone,
I wandered if any members know the formula for working out the wing loading of a model?
Keep it as simple as possible folks, it`s been a long time since I was at school !
Many thanks
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Post by abacus on Jan 15, 2014 23:41:33 GMT
Wing area in sq inches divided by 144 gives square feet.
I.e. 120 inch span and 10 inch chord gives 120x10 = 1200 sq inches.
Divide by 144 = 8.33 square feet.
Overall weight in ounces ..... say 3lbsx16 = 48 ozs
Divide weight by area i.e. 48/8.33 = 5.76 ozs per square foot.
Change the units if metricated
Hope that helps
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steadykev
Junior Pilot
.....of course it`ll fly....
Posts: 166
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Post by steadykev on Jan 16, 2014 10:21:59 GMT
Hi abucus,
Many thanks for that.
I can now work out what the wing loading is on my current models. Just out of curiosity really.
Just a thought, but if you have a tapered wing (cord wise) would you take an average cord over the entire span?
Cheers.
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Post by abacus on Jan 16, 2014 15:40:47 GMT
In deed ... but gets a little more complicated with compound taper and ellipitical tips. |
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steadykev
Junior Pilot
.....of course it`ll fly....
Posts: 166
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Post by steadykev on Jan 16, 2014 20:00:00 GMT
Thanks for the info abacus.
I think we`ll leave the more complicated compound taper and elliptical tips for now !
My brains aching already, but it is interesting working out the actual wing loading of the models your flying.
Cheers for now.
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steadykev
Junior Pilot
.....of course it`ll fly....
Posts: 166
|
Post by steadykev on Jan 17, 2014 21:21:21 GMT
Hello everyone,
Just found this formula too. I have tried it and you end up with the same answer which ever formula you use.
........ you can perform the entire calculation in one shot using simple substitution:
(Weight x 2304) รท Wing Area
= W.loading
Where weight is in pounds and wing area is in square inches
Cheers all
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