a question!?

[Beginner!?]

hi friends

what are these i showed at the pictures at the end of the wings

why some of planes have these upwards at the wing?

thanks for any help

[BMatthews]

Those are still part of the wing. What you have hre is multiple panel dihedral wings. The first pic is generally reffered to as tip dihedral because only the tip panels have dihedral in them. Dihedral being the upward angle in the wings. It is there to provide level flight stability so if the model is bumped it'll come back to level flight. And if the model uses a rudder and elevator and no ailerons then the dihedral in conjunction with the rudder control provides the model with the ability to roll into the turns.

The second one has a an additional joint in the center under the motor so this 4 panel type is commonly called polyhedral. Additional types of dihedral are the simple V type where there's only one joint in the middle or perhaps there's a very short center section that only goes over the fuselage area. Then these days you see some gliders with a flat center section with two further dihedral panels further out so there's actually 5 panels which seems to be reffered to a 5 panel wing most times.

On some wings you may see tip panels that are either vertical or very strongly angled upwards. Those are not parts of the wing in the normal sense but are winglets and they are used to help control the wing tip vortex formation. But if you see them on a swept back flying wing then they are actually tip fins as well as winglets.

Hopefully that'll help rather than confuse. Obviously you're new to this stuff.

[Beginner!?]

thanks alot for your reply

so these upwards are only for making the plane more stable only and dont have any role for lifting?

yes i am very new so need help for many things.

[globemaster3c17]

They still provide lift. The main difference between these planes and more common planes is simply where the wing angles up at.

[Ekim]

On the two planes that you showed, they perform the same function as dihedral and are still functional, lifting wings.

[BMatthews]

When you look down directly onto the top of the model so that you can't see the upward angles what you see of the whole wing the area of the wing that lifts. This view of the wing where you ignore the upward angle is called the "projected" view. It refers to the view of a part seen from a specific direction in draughting (as in drawing).

[Beginner!?]

oh i knew it provides lift even with that upward but my mean was does the wing makes any more lifting with that upwards or this kind of upward is the same for lift with while it is not upwarded

thanks for your attentions.

[Andy W]

BMatthews explained exactly why they are there in the first paragraph of his first response. They provide no more or less lift (when compared to a wing of equal projected area).
..a

[Ollie]

The dihedral of the wing has two functions. Using rudder to yaw the plane and using the yaw for the dihedral makes the plane to bank. The bank makes the plane to turn! With out the wing dihedral, the rudder yaws but no wing bank and the slipping plane does not turn.

The dihedral of the wing is making yaw stability so the plane goes straight with out wandering.

[Beginner!?]

Ollie,

do you want to say that these upwards "dihedrals" make the plane STABLE WHILE It uses the rudder for yaw?

i made an indoor plane some days ago with no upward on the wing so when i used the rudder the plane went down with one side (depend on the rudder direction!)


so do you want to say that this upward is for prevention of this side down which happened for me?


while i read the above posts i thought that the mean of dihedral is for stabelity of flight at stright flights!