John:
Thanks for the tips. Visually aligning two sticks in the tissue tubes
is a lot easier than building a jig, which itself may or may not be perfectly aligned.
Attaching the tissue tubes to the wing spars sounds like a great idea. That way I can pack the wing more easily. Right now I have to be careful about the lid of my box pressing down on the wing posts that stick up from the wing.
--- In Indoor_Construction_at_yahoogroups.com, "John Kagan" <john_kagan@...> wrote:
>
>
>
> --- In Indoor_Construction_at_yahoogroups.com, "calgoddard" <calgoddard@> wrote:
> >
> > A continuing problem I have with some of my planes, e.g. a Cezar Banks LPP, is that the wash-in disappears or, in extreme cases, changes to wash-out as I adjust the forward wing post up or down to change the incidence of the main wing during trimming.
> >
> > I use tissue tubes glued to the motor stick as sockets for the wing posts. I know this arrangement is standard.
> >
> > All I can figure is that my wing posts are not perfectly perpendicular to the spars.
> >
> > Or maybe the wing post sockets are not perfectly aligned? Perhaps I need to use jigs to align the tissue tubes when they are glued to the motor stick.
> >
> > I typically glue on the front wing post and the back wing post using a jig or the edge of the building board to get the posts parallel to each other and perpendicular to the wing spars.
> >
> > I then glue in the forward diagonal brace. I then insert the wing posts in the tissue tubes that are connected to the motor stick. I then glue in the rear diagonal brace to get the right amount of wash in. I would appreciate any advice on this issue.
> >
>
> I used to use jigs to align my wingposts, but then I would check them visually and find they needed adjustment. I figured, why bother with the jigs if my eyeballs were more accurate anyway.
>
> I suspect misaligned tissue sockets may be your problem. Try interting two straight sticks into your wing sockets and sighting down from the front. They should overlap exactly. It is easy to see if they are off and the sticks are not parallel.
>
> BTW - one of Bernie Hunt's many innovations was to move the tissue sockets from the motorstick to the wing, and put the wingposts on the motorstick. This allows you to pack your models in a much smaller space.
>
Received on Wed Jun 08 2011 - 17:14:59 CEST
This archive was generated by Yannick on Sat Dec 14 2019 - 19:13:46 CET