Think that's how you spell it. Well, my dad was trying to explain how it is put together. Well he said that the inner part of the wing is cut at an angle, and when you glue them together then you have the dihedrial. I'm sure I can find someone here that has a close up picture that they could show me on how it works. Thanks Alot...........I'm not buildin anything right now with the dihedrial except a Kadet Senior a guy gave me for free. But, I just wanted to know so when I get to that part then I'll know. Actually it might be that he has already cut all of that out because the wings look to me like they are done. Well, thanks again. Also, any thoughts about the Something' Extra or the 4*40 or 60? Thanks Alot again.................

If you have a Kadet kit you will notice in the manual and the plans that there is a spar brace with the dihedral angle already set for you. If you follow the manual properly you will learn about the dihedral and how the wing center ribs have to be lined up....normally its half the angle of the dihedral for the wing.

Dihedral is never (or at least I have never encoutnered it) cut into the wing. Mostly, when you build the wing, the Rib at the root of the wing is installed at the angle of the dihedral (many kits come with a dihedral guage that you use to set the angle of the root rib). The wing joining mechanism is also set with the dihedral in mind. The wing tubes are angled to match the dihedral if the wings slot on to wing rods. If the wing is permanently joined, there is often a plywood wing-joining brace that has the dihedral cut into it.

Bascially, once the wing dihedral is set (at wing building time), there is little you can do to change it afterwards. You can't just cut it to be different (without also designing a new wing joining structure).

gus

I'm sorry, I forgot I put cut.......I was thinking that the rib at the root? is cut at the angle. The root is the part near the center of the fuselage, right? Well, that is what my dad was talking about but I don't really understand it. I'll just have to look that the Kadet Senior and see what it looks like.

All the ribs are glued straight upand down on the building board except the root, centre rib, which is glued at a slight angle, the top leaning toward the wingtip. thats the dihedral angle. hope this helps.

I'm beginning to understand it more now. Is there a picture of somone's plane wings that you have found that you could show me to help me better understand. I kind-of understand better now. Thanks Alot..............so just the rib near the root (rib closest to the fuselage) is the one that is offset and is at an angle. So this one rib at the root, the top is at an angle that is pointing to wards that wing tip. So, is that how it works. Thanks Alot Once Again!!!! Sorry I learn so slow.........

iflynething

I actually do cut the dihedrial into the wing. I build the wing accord to the plans. Then I mount each wing half on a flat board and align the wing half on my 10" radial arm saw. I then raise the wing tip the appropriate amount and make the saw cut.
This makes a beautiful cut and there is no tearing of the balsa or what ever wood is used. This method works excellent on foam wings and there is no void between the wing halves when they are matched together.

Find a friend with a radial arm saw.

Good Luck

Lee

Also one other thig about the Kadet Senior, it is three channel. Throttle, Elevator, and Rudder. Well, I have tried to fly my Superstar with just the rubber and elevator like i would with the Senior. I just wanted to get some practice. But, I really would like to cut ailerons into the wings. Well, I have this picture that I will post that the guy that gave the guy that plans drew me. So, is this pretty much how it will work if I put a servo in each wing half. All help I thank you so much. Thanks Alot...........Well, I might get to show you that picture.....ok here we go...........ok.......there...........do you understand that............whould I just follow that........I'll just probable just get the guy who gave the plane to me to help me when I get to it.............

Yeah forgot one thing...........sorry about the lost image quality when you click on the picture for the full image...........Thanks for the info in advance............THanks

Quite simply, look at the sketch below. Two root (or center) ribs, each set at an angle when the wing is built. If the plan calls for a dihedral angle of 2 degrees, then each root rib is set at a 1 degree angle. The result is two degrees.

By the way, as a rudder & elevator only airplane, that Kadet will have a larger dihedral angle than your Superstar. Dihedral helps the aircraft turn when using rudder, so flying your Superstar with rudder and elevator will not be exactly like flying the Kadet.
Dennis-

Michael, If you put ailerons in the wings, you'll want less dihedral than called for in the plans. Local help may be your best bet. The modifications you desire aren't difficult, but to me, at least, are hard to explain in a clear, understandable manor.

I believe that I finally understand that drawing.........thanks.........I'm glad that I got a picture...........sorry i'm so slow to understand.........Thanks Alot though..........

Ok. I'm building a Midwest aerostar .40. Supplied with the kit is a dihedral guage. After building the wings according to plan the and the dihedral brace inserted the root ribs don't match. ther is approx 3/32nd gap in the center portion of the root rib on the bottom and the same fore and aft on the top of the wing. I've been told that with the brace installed and the top sanded filler should be ok since the joint is re-enforced with fiberglass cloth top and bottom. Any thoughts?

Of course, if you're building a model with a foam wing, then 1/2 of the dihedral angle actually IS cut into the root of each wing panel. In some of the old Bridi kits, you built the wing with all of the ribs at 90 degrees to the spar and then inserted a wedge-shaped center rib that set the dihedral angle.

With a few kits under your belt, you'll be able to easily see the different ways that different kit makers set the dihedral angle. It's not rocket science, and not even particularly critical, unless you're looking for a specific performance characteristic. In the old Pattern days, Don Lowe used to tune the dihedral angle of his Phoenix-series models by partially sawing through the center joint, adding epoxy, forcing it closed, and then laminating a layer of glass cloth over the joint. This allowed very small changes to get the model tuned to his exact liking.

bax

On the homebuilt Bushwacker in my avatar I originally built the wing flat on the board. When I test flew it, when I gave left rudder , it turned right. I cut the wing in two with the bandsaw and cut 1in. dihedral in it with the bandsaw, glassed it together around the centre. Worked fine after that.

hmmm, I think you entered the Twilight Zone