Wing size?

[pit91]

Hey all,

I have drawn up plans for a bluecore foam trainer-type plane. I came up with the design by plugging in formulas my physics teacher gave me and I have an airfoil suited for the plane I got off of a airfoil design program. My question is: what is a good ratio or formula for figuring out the correct (or at least getting a decent starting figure) for the wingspan relative to the fuesalage for this type of plane. Any help would be greatly appreciated.

[HugePanic]

the wing has to lift the plane! so the planes weight is very important --> wing loading

if you are building a trainer, then just "copy" the wing-size of a similar aircraft. to get it flying it doesn't matter if the wing is 5% smaler or larger.

if you are building a high-performance aircraft then the wings size (and shape, profile, angles...) is much more important.

you could post the formulars you would like to use here. i am sure someone here can help you out how to calculate a propper wing size.

[Majortomski]

MANY years ago, an old modeler gave me the rule of threes.

each wing panel should have an aspect ratio of 3:1, it is 3 times as long as it is wide. So the whole wing has a 6:1 ratio.

The horizontal stab has 1/3 the area of the wing

The distance from the Leading edge of the wing to the leading edge of the stabilizer should be 3 wing chords in length.

These were the old imperical methods to a starting point for a design.

[eflightray]

pit91

Have a look at this site - Practical RC Model Design (http://webpages.charter.net/rcfu/HelpsHints/ModDgn.html) it gives you some basics of the size ratios.

[pit91]

Thank you all verry much. Thats exactly what I was looking for!