You can buy the white binder strips with greater lengths then A4 size at Arts
shops rather than Stationary shops. I placed bulsa wood underneath the white
binder strips epoxied onto the tab, then the White Binder strip epoxied onto the
bulsa wood. Gives it solidity!!
Tim
Fred Fillinger wrote:
> > A question for anyone on the subject of Flettner strips touched on below.
> > I've noticed on the US factory demonstrator that the Flettner strips are not
> > the full length of the trim tabs like the manual shows. It looks like
> > plastic report splines were used. What are the latest opinions out there on
> > full length strips and their heights?
> > Dan Geldermann
> > A139
>
> I bet they're shorter cuz the plastic report binders come in one
> length. For cosmetics, there's no problem with full length. The
> Flettner strips serve only to increase effectiveness of the tabs (and
> stick feel) in making small stick or trim adjustments. Presuming they
> do this by sticking up further into the boundary layer, which is
> fairly thick back there, they need be no bigger than what the book
> says. Else I think all you get is more drag, as even the min. 5/16"
> called for is many times the optimal trailing edge thickness for
> minimum drag.
>
> BTW, Anton Flettner invented the trim tab, but I can't find where his
> tabs had strips. He wouldn't have called them that, others later on
> would have. But 99.9% of trim tabs don't have them. ??? :)
>
> Regards,
> Fred F., A063
--
Timothy P Ward
12 Waiwetu Street,
Fendalton,
Christchurch,
NEW ZEALAND
Ph. 0064 03 3515166
email ward.t@xtra.co.nz
Mobile 025 2649325
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