help please making 30ws polydihedral with 2inch dihedral ,can any1 suggest how many inches from tip should i make the dihedral break \___/.is         is 5 20 5 ok

i think there is a mistake you posted this in for sale section.

sorry still dint get the hang of it

Hi  romanxdsouza!!

Dihedral means the wing looks like a wide "V" when looked from the nose of the plane(), what you are saying (\___/ 5 20 5) is a Polyhedral.

2 inch Dihedral on 30 Inch Wing span means that the wing tips are lifted 2 inches up from the ground level while the wing root remains at the ground level. I don't know if it is a good definition of "what you need" but you can figure it out. You are always welcome to ask for more help.

Thanks.
Cheers.

sumeet i meant were to bend the wings on the LE and TE  ???to make the polydihedral ,how do i explain     

So you need to modify the wing between the edges not the wing tips. Friend, The polyhedral or Dihedral are the terms actually applied to the whole Wing span not on the Leading or Trailing Edges of the wing. Do you mean to bend down the airfoil to achieve "Under Camber".

k let me try to explain friend im making a 30ws so want to know if 5 20 5 is ok for polydihedral, so wat im try to ask is if it is ok to make the same that is .........The tips could be short, about 5" long and would only need about 2" of dihedral or rise at the tips. so i then i would have a flat 20" center section and that is much easier to build and much stronger than having a dihedral joint in the center of the wing. im not making under cambered trying a simple kfm. im just trying to find out if this measures ar ok guess dihedral break is not the word

dude you can go for the same.. 5 20 5
or 4 22 4(if you are sticking with 30" span)
the actuall size of a Russian trainer is 7 34 7

hey arun with poly dihedral this is the 36inch WS auw 350grms ,full plane made of depron fuse made of depron aswell landing gear weak thou

hey arun, this is also polydihedral 30"ws my own design haha,fuse basswood,rest depron,both detacable wings for easy transport, any ideas for landing gears,wanted to PM  u all this stuff but dont know how 2 add pics thr bro,ohhhh plane weighs 100grms with out electronics ..and again thank u bro for alll ur help n patience lets hope these babies fly, n fly slow hahaha thank again u very helpful   :bow:some experienced guys just tell u search d forum n if u cant find stuff thy say u lazy hahaha thank mann will update ,crazy wind n mumbai bandra

Actually the senior members are suggesting you to go through the form is to improve yourself..
which will make you learn more than you learned now..
so try to browse all over the form to get many ideas and tips..
and abuot your model the 30" model is really looking good... and it will fly good with your electronics..

dude i understand i hav to go thru d forum,  i do go thru the forum , but there are certain topics for a newbee to search like me is not easy i tried searching " polydihedral wings" dint find much, i have browsed since i couldnt find i ask for help. and thanks to all replies that 2 new beginners