Gliders > Slope Soaring
West Wings Skylark build thread
angry_muppet:
So, the latest update...
I manufactured and fitted the nice additional bits as suggested by Little Keith...
It all looks nice and clean and well repaired. Lets see how it all fits together...
The answer? It doesn't... >:( >:( >:( >:( >:( >:(
Ain't that just sweet!
A 1.5mm ply brace that snaps when you try and fit the elastics to the wing.
My question is: "what now?"
I have enough ply to remake one brace, but this is likely to happen again. I have 2 carbon rods from a previously crashed plane which could be used... My issue will be getting more 1.5mm balsa/ply to resurface the wing again. :'( If anyone is placing an order or can direct to anywhere in the SE that will have a little in stock, let me know.
Positives? It's all learning for No 2... :P
johnfireball:
Hi,
That looks like lightply which is not suitable for the wing joiner. Get proper hard plywood and make a new one.
John.
Happy Days:
I'm wondering why the joiner broke just by putting the bands on the wings? :-\
David, when the wing halves are joined together the underside of the them should look like a rather flat "V". The very bottom (or point ) of that "V" should protrude into the cavity of the fuse and the underside of the wings should rest on the top of the fuse..
I'm thinking that the only way for the bands to have snapped the joiner is if the bottom of the "V" was resting on something causing the wing sit too high and 'rock' from side to side. The bands would then have been trying to pull the dihedral of the wing 'flat' and so snapped the wing joiner
Keith
Spanner:
Hi,
I would suggest that you use some good quality 3mm hard ply / Birch ply and make the joiner full depth or perhaps 1mm less. To install simply cut slot out of both top and bottom skins and using saw remove just enough of the ribs to allow it slot in. Glue to both top and bottom spars and leave a slight gap at the top and bottom which can then be capped with balsa and sanded back. Also ensure that the grain is running along the brace which is normally the direction that provides most strength, from your photo it looks like the grain was vertical in the joiner that you made. To spread the load at the joint between the two wing halves onto the skins you could also use some 50mm wide white bandage and lay across the joint between the two wing halves it can be glued down using white glue rubbed in. This would reinforce the but joint at the wing root.
Hope this helps
Joe
Spanner:
Hi,
Just one more observation, are you actually gluing the two wing halves together as the brace is just that a brace to reinforce the joint. The joint along the two root ribs looks very cleanly broken if it was glued.
Joe
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