Aileron size and position on the wing ? - RCCanada - Canada Radio Controlled Hobby Forum
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Old 11-23-2005, 08:06 AM   #1
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Aileron size and position on the wing ?

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I am scratch building a mustang P51D wingspan 24'.
I did a couple of search on the Internet for models and samples specially to have an idea of the wing profile.

I note that for the same plane, depending the model, the aileron are not on the same position on the wing, and have not the same dimensions. (See my pictures below).

My questions are: For a 24' wingspan small warbirds (Indoor):

1) What are the rules (calculations ?), to define the right position, dimension of the aileron when scratch building the wing ???

2) Do you have ideas of impact on the fly depending the aileron type and position on the wing ?

Below is my home made plan for the wing: I have 3 solutions. Refering to the picture 1. What width should I take if I decide to modify the aileron like in the picture 2 and 3 (A or B for the aileron width) ?

Thanks for the help.

My 3 solutions for the wing

Picture 1 (click on the picture for bigger view)

Picture 2

Picture 3

Eloas - Canada
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Old 11-23-2005, 09:28 AM   #2
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I don't know the formula for calculating aileron area but I do know that bigger is generally better, especially on a small, slow warbird that needs to turn on a time. My scale combat Mustang has strip ailerons that are even longer than your solution 3.
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Old 11-23-2005, 10:55 PM   #3
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I saw 24'(feet) and almost pood myself. I don't know much about scale warbirds but if you plan on flying a 24" bird inside I would make the ailerons bigger than #3 as well. Make them large and reduce deflection if necessary. also the closer the ailerons go to the fuse the more authority they will have due to prop wash at slow speeds.

But then I fly(read crash) foamies wich have absurdly big ailerons.
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Old 12-07-2005, 05:10 AM   #4
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Hi, there is lots of math involved, but as a rule, 7to10% of the total wing area is usually enough, then take that number and design your ailerons.

As mentioned by other members the longer and larger the ailerons the more authority you`ll have, but for scale 7-10% useually works.

what I mention before edit was wrong, , the above mentioned should get you in the ballpark
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