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steve

wing twist

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i found the answer on a different forum..nn.

 

i still see a few mistakes in the 3rd planes. are we calling up spruce to have them fixed or would that be a waist of time ?

Nat emailed me and said there were no mistakes that he was a were of:irked:

i just found one in the wing layup.

" #1 layup is a 2 bid liner......

next is layup #1 the first of many sheer web......

just do 1, 2 times.....and lwa6 is 2 by 2.3 not 2 x 2 ;) easy to miss.

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is there washout in the cozy wing ?

if you order a flat wing will the washout still be there ?

what is washout in a wing ? and is it twist ?

will i have it in my cozy and how do i check it ?

is there other places to look for my answer's ?

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is there washout in the cozy wing ?

if you order a flat wing will the washout still be there ?

what is washout in a wing ? and is it twist ?

will i have it in my cozy and how do i check it ?

is there other places to look for my answer's ?

Yes, the water line on the templets take the wing twist or washout into account. when you level the water lines when fastening them on the foam blocks you are building the washout into the wing. if you want to see how much, lay the templets on top of each other with the water lines lined up and you will see the angle change. the more outboard, the more the leading edge is twisted down. as the angle of attack becomes higher the inboard section will stall first because it is at a higher angle of attack then the outboard section. this keeps the ailerons flying while the inboard section stalls, making the plane more stable and controllable during the approaching stall. not sure what a flat wing is but if you mean a straight trailing edge, yes there is still is the same amount of washout or maybe even a little more twist to the overall wing.

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I'm lost, my best guess is the left wing is 0 deg over the 67.bl (end of strake)

and 8mm down at the tip (about a foot back for the blend) measured from the LE.

the water line at the wing tip is .08 down(that is measured from the LE to the TE ) what do you all think ?

bottom line (this time) is 3/8 low....3/8 twist . :confused: :confused:

run with it ? or start over or a third option ?

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Steve:

 

I did a couple of calcs of the water lines and level lines, taken from the level lines on the wing templates, and water lines on the wing jigs. Take them for what their worth.

 

LE is WL 17.4" all along.

TE at BL 159 should be approx 17.4" + .75"

TE at BL 43.41 should be approx 17.4" + .2"

 

Rick

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