Hi,

Can someone tell me what is the amount of dihedral do current pattern plane have. Of couse it's difference from model to model but I don't think is too much of a gap in degree. What I know is mid wing needs less and low wing needs more but current pattern plane wing is some where in between. As I know, a thump of rules is to have the top surface of the wing flat.

There are no rules of thumb.

If you are designing your own plane, be prepared to adjust your dihedral during flight tests. More dihedral is needed if adverse roll is present in knife edge, that is it rolls in a direction opposite rudder. Less dihedral is needed if the aircraft rolls in the direction of the rudder. Due to fuselage geometry, etc., determining exact values of dihedral before flight is pretty much black magic.

If you are building an existing design, go with the suggested values, but be prepared to tweek dihedral mechanically or add electronic rudder-to-aileron mix.

Most tend to be in the 5 - 7 degree range currently. There are a couple with as much as 9 I have heard, but that is the most I've heard,

Arch

Thanks guys for your explanation. I'm getting a clearer picture now. Just curious what's the amount of degree we are flying as most kits manufacturer never indicate.

Sorry, I read that wrong, I was thinking anhedral...sorry....I think most of the planes usually have the top of the wings flat, or pretty close to that.

Arch

rcpattern,
You mentioned 5-7 degree is per side of the wing? That means the wing top is not flat on the top side.

Sorry rcpattern. I overlook your second post.