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Old Oct 14, 2011, 12:56 AM
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Joined Oct 2011
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Help!
help soooon

have to design a rc aircraft of wingspan 59 cm and chord length 10 cm so as to get aspect ratio of 5.9... i want lift a payload of 5kg.. thae max dimensions should not exceed 60 cm and max weight not beyond 500g. am using balsa 5 mm for fuselage.. some one plzz help me which AIRFOIL would be the BEST to life 5 kg..HELPPPPP SOOOOON.... WILL BE REALLY GRATEFUL ..can i use kf m3 airfoil ?
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Old Oct 14, 2011, 02:26 AM
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Joensuu, Finland
Joined Mar 2002
1,424 Posts
Let's see, you want to lift 5500 grams on a 5.9 sqdm wing? That's 917 g/sqdm (300 oz/sqft for our imperial friends). Even a tenth of that would be considered heavy.

IMHO, it is safe to say that there is no airfoil that can do it.
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Last edited by jkettu; Oct 14, 2011 at 02:45 AM.
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Old Oct 14, 2011, 07:24 AM
An itch?. Scratch build.
eflightray's Avatar
South Wales U.K.
Joined Mar 2003
12,778 Posts
I agree with jkettu, that looks totally impossible using the wing for lift. Even a helicopter or vertical lift model within those dimensions and restrictions, (max weight 500g, payload 5kg), would fail as well.

Are you sure your figures are correct ?
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