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Old Mar 28, 2015, 10:47 AM
kak8 is offline
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Alegro Lite tip

Hello

I build the wing tip at the moment and waiting for the end rib to cure.
Next step will be to glue lower sheeting.
I have seen people are doing some strange things with the sheeting at the end part of the tip. I just sanded the bottom flush with the ribs, for the sheeting.

But the top sheeting - there is no bonding area at the end. Just the edge. And the spar.
Should I glue a little balsa and sand it down, to create a little triangle and some more bonding area?
Because I will sand through the sheeting when finishing the wing.
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Old Mar 28, 2015, 02:42 PM
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so you can leave but it's better to add a stick of balsa , but the front part of the ending actually superfluous ,I have a front lining strapped to each other
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Old Mar 28, 2015, 02:54 PM
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something
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Old Mar 28, 2015, 04:38 PM
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Thanks.
I will add some balsa under the sheeting.
I must be carefull with the weight. I already have one Alegro wing, made of wood, which weights 400g. I didnīt taper the end of the tip.
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Old Mar 30, 2015, 09:03 AM
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What kind of glue is Duco or Ambroid? Itīs recommended to use it to glue the triangle strips, but I canīt find it in my local stores. Does it fill the gap between sheeting and the spar?
Can I use the foaming gorilla glue instead?
I know how to fill gaps, but I want to do it light, so itīs better to stick to the instructions :-)
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Old Mar 30, 2015, 04:05 PM
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Ok, Iīve figured it out. The gap doesnīt matter. It will be covered with coverng film.
There are much bigger gaps, like between the ribs :-)
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Old Mar 30, 2015, 05:05 PM
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the biggest drawback aesthetic appearance when the lower spar sticking out and I drowned 1.5 mm

http://static.rcgroups.net/forums/at...9102010272.jpg
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Old Mar 30, 2015, 05:47 PM
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I guess itīs ok for electric glider or highstart if the spar is a little lower.
This is my first carbon spar. I have never build a spar that stiff :-)
Almost impossible to bend in my hands. Itīs like a steel rod of the same size :-)
But if the weight of the glider is under 600g, thats more than enough for me.

And I donīt have this very thin 0.007" carry through carbon stips, so I had to make a little pocket in the tip and a little joiner.
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Last edited by kak8; Mar 30, 2015 at 06:03 PM.
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Old Mar 31, 2015, 09:12 AM
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Thatīs much better. Sheeting support.
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