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Figuring wing loading - 7/4/2012 1:13 PM   
mustangman177


 

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Status: offline 		Simple question here:

Built a plane that has a weight of 6 lbs. even (weighed with electronic fish scale) and has a wing surface area of 720 sq. in (12 in. chord by 60 in. length). Now the ailerons are 2 in. in width. Should the chord be 14 in. ? Do you figure in the ailerons when figuring the wing loading ?

Thanks

Cary

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RE: Figuring wing loading - 7/4/2012 1:18 PM   
R8893


 

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RE: Figuring wing loading - 7/4/2012 1:37 PM   
edsplane


 

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Status: offline 		R8893 is absolutely correct. The ailerons are always included in the wing area, as is the portion of the wing that's covered by the fuselage.

  Also, in case you don't have this, a convenient equation you can use, to find wing loading in ounces per square foot, is,

   wing loading = 2304 times (airplane weight in pounds divided by wing area in square inches) = ounces/sq. ft.

So, for your plane, WL = 2304 x (6/840) = 16.46 oz/sq ft

It may be a little sensitive to wind gusts, but should fly great.

Best of luck


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RE: Figuring wing loading - 7/4/2012 2:58 PM   
karolh


 

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Status: offline 		Think your calcs are a bit off as wing loading is weight of model in ounces divided by the wing area in sq. ft which in this case is 6.0 x 16 = 96 divided by (60"x12") 144 = 5 sq.ft. = 19.20 ozs. per sq.ft

Karol

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RE: Figuring wing loading - 7/4/2012 4:10 PM   
iron eagel



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Status: offline 		The area of the wing is 14x60=840 sq inches divided by (144 in/sq ft) that gave me the 5.833 sq ft for the wing area.
With that figure of 5.833 sq ft for the wing area and with a weight of 6 lbs (96oz) that calculates out to 16.45 oz per square ft for the wing loading.
Good weight for a 40 size plane...

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RE: Figuring wing loading - 7/4/2012 5:11 PM   
mustangman177


 

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Status: offline 		Thanks guys for the information on figuring wing loading. The plane (SPAD corostang) is a real floater and pleasant to fly with a 55 AX turning a 12 x 4 with mac's black muffler.





< Message edited by mustangman177 -- 7/4/2012 8:26 PM >

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RE: Figuring wing loading - 7/4/2012 7:30 PM   
karolh


 

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quote:

ORIGINAL: iron eagel

The area of the wing is 14x60=840 sq inches divided by (144 in/sq ft) that gave me the 5.833 sq ft for the wing area.
With that figure of 5.833 sq ft for the wing area and with a weight of 6 lbs (96oz) that calculates out to 16.45 oz per square ft for the wing loading.
Good weight for a 40 size plane...



Oh boy, I missed that the 2" wide aileron was omitted from that 12" wing chord dimension

Karol

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RE: Figuring wing loading - 7/4/2012 7:55 PM   
iron eagel



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