Gliders > Scale

ASK-13

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gerryb:
hi andrew, k13 looking very good. hope you are enjoying the build. when i built my one, i used lots of diagonal bracing between the formers to help support the sheeting. if you check any full size k13's, (or any schleicher gliders ) you will see these diagonals in place. hope this helps, gb.

andrew wallace:
hey a big thanks to william and kate for today the day off i got the wing spars made and got the ribs all sorted

there's 27 ribs and the spar is made out of 1/8 spruce ,there is 3mm of wash out at the start of the aileron and 9mm at the tip

only thing that's bothering me at the moment is the dihedral

is that 3 degree's or is it 3" at the tip  #-o

Happy Days:
Looking at the plan,….as I read it I’d say it was 3inches of dihedral at a distance of 30 inches presumably from the wing root. Although what significance 30 inches from the root would be I have no idea. :!:

Fred will tell you what it should be…………….FRED, oh FRED!!

andrew wallace:
doubt i'll have to drink a few more beer and think about it  :lol:  :lol:
but what you're saying keith makes since  :clap:
and i never thought of that
i've asked the same question on www.scalesoaring.co.uk
so it will be interesting to see if you're right keith  :?:

Fred:
Hi Andrew / Keith,

I'd say 3.3 degrees /wing (total of 6.6degrees diedhral).
But 3 inches at the tip is also plausible.

That's less than the real one by the way (5 degrees/wing). They have higher diedhral than the "norm" because of the swept wings.

Anyway, the diedhral should be built up on the ribs, where the wing joiner slide on the ribs if you see what I mean.

Hope this helps  :D

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