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Tony Aston
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Join Date: Jun 2007
Location: Oxford, UK
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Wing loading calculation

07/05/2022 3:55 AM

I am building a radio controlled model of the WW2 Westland Whirlwind fighter. The wing span is 63 inches and will have 2 electric motors as power sources. I would like to calculate the wing loading but am unsure of whether I should take the total area (upper surface) or use the lower surface area which would exclude the area of the nacelles.

Your advice is appreciated.

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SolarEagle
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Join Date: Mar 2007
Location: by the beach in Florida
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#1

Re: Wing loading calculation

07/05/2022 5:32 AM

I think it has a lot to do with shape as well...anyway lots of good links here...

https://www.rcuniverse.com/forum/rc-warbirds-warplanes-200/10306951-wing-loading-2.html

....and interesting discussion...

https://www.omnicalculator.com/physics/wing-loading

https://www.airfieldmodels.com/information_source/math_and_science_of_model_aircraft/formulas/wing_loading.htm

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Rixter
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#2

Re: Wing loading calculation

07/05/2022 7:50 AM

This site says to use the upper surface area.

"To calculate wing loading, divide the mass of the bird or plane by the total area of the upper surface of its wings: wing loading = body mass (kg)/wing area (m2)."

https://www.sciencelearn.org.nz/resources/301-wing-loading
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phoenix911
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#3
In reply to #2

Re: Wing loading calculation

07/05/2022 8:37 AM

Since you mentioned mass, with using electric batteries, be aware of the center of mass on the plane is. Placement can be critical.

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SolarEagle
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#4

Re: Wing loading calculation

07/07/2022 2:07 PM

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Tony Aston
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Location: Oxford, UK
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#5

Re: Wing loading calculation

07/08/2022 8:40 AM

Thank you all for your help and guidance. Here in the UK there is a project to make a full scale replica https://www.whirlwindfighterproject.co.uk

I will keep it simple and measure the wing area and then weigh the plane when it is ready to fly.

Thank you

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Rixter
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Location: About 4000 miles from the center of the earth (+/-100 mi)
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#6
In reply to #5

Re: Wing loading calculation

07/14/2022 6:02 PM

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phoenix911 (1); Rixter (2); SolarEagle (2); Tony Aston (1)

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