Phedon,
Leop probably uses what Amazon can provide, 0.072ID with 0.002" thick wall. Just about ideal for 1/16" square balsa wing posts ala A6. It is thicker than needed wall-wise for F1D hubs and the ID is smaller than most use on the wooden spars. This causes a stress point just as the spar exits the tube as you have to remove so much material to jam it into the tube. CA will toughen that point, but adds too much weight. A 0.080" ID tube would be ideal.
Regards.
Mike Kirda
--- In Indoor_Construction_at_yahoogroups.com, Phedon Tsiknopoulos <phedon21t@...> wrote:
>
> What are the dimensions of this item that you use. What wall thickness etc. ?
>
> Sent from my iPhone
>
> On Jan 10, 2014, at 2:49 PM, <leop_at_...> wrote:
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> > Phedon,
> >
> >
> >
> > Polyimide tubing is compatible with CA adhesives. This is a design property of the material. And, we can use our cellulous based glues like Ambroid and Duco with polyimide by just coating the polyimide with a thin layer of thin CA. Cellulous based glues adhere well to CA (partially as a result of both being soften by acetone). Five to six pound/CF balsa is weaker than such a joint as I have earned from the polyimide tubes pulling off a layer of balsa rather than the glue joint failing when mishandling or crashing my planes.
> >
> >
> >
> > LeoP
> >
> >
>
Received on Sat Jan 11 2014 - 05:11:57 CET