Re: Re: F1D motor tube twist?

From: Tapio Linkosalo <tapio.linkosalo_at_iki.fi>
Date: Sun, 30 Aug 2009 08:43:39 +0300

john_kagan wrote:
> <tapio.linkosalo_at_...> wrote:
> >
> > ...The second
> > one gave more problems, at launch torque (~15 to 17 g*cm) the wing
> > twisted a lot, requiring lots of extra decalage to prevent a dive-in. I
> > tried to figure out the source of the twist, as these two models should
> > be similar, built at the same time from same materials, and weighting
> > the same.


> In my experience, excessive wing twist is most likely due to problems
> with the wing posts or related connections. It is possible that it is
> due to the motorstick twisting - it will twist, and when done properly
> that's a good thing for the launch. But too much twist is usually caused
> by something else.

This was indeed the case. Fixed those wing supports, tested the model
yesterday, and now it worked and flew as it should. Good. Thanks!


-Tapio-
Received on Sat Aug 29 2009 - 22:44:23 CEST