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1/3 Cessna O2 airfoil advice needed

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1/3 Cessna O2 airfoil advice needed

Old 11-06-2020, 04:25 PM
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Smokeyr67
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Default 1/3 Cessna O2 airfoil advice needed

Hi All,

Iím in the process of researching and designing a 1/3 scale O-2, and Iím wondering if I should go with the full scale airfoils (NACA 2412 inboard to a 2419 at the tip or modify them (maybe a bit thicker overall) to make it a bit more forgiving in slower flight?

Any ideas will be appreciated

Smokey
Old 11-06-2020, 04:35 PM
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Thud_Driver
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Those should work fine. You could go 2-3% thicker but I doubt you need to. Think you mean 2409 at the tip

Last edited by Thud_Driver; 11-06-2020 at 04:38 PM.
Old 11-06-2020, 05:02 PM
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Smokeyr67
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Yeah, 2409, had a bit of a fat finger moment

Thanks for the advice, it’s much appreciated
Old 11-06-2020, 06:57 PM
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Chad Veich
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I agree, at 1/3 scale there is no reason not to use the scale airfoils. Concentrate on building straight and true and keep it reasonably light and you will have a winner.
Old 11-06-2020, 07:27 PM
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Smokeyr67
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Thanks Chad,

I’m hoping to bring it in under 25kg wet, but with about 10kg of motor in it I don’t fancy my chances

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