REFLECTOR: Gap Seals, fences, zig-zag tape

[Scott Derrick]

He has tape on teh top of the ailerons, but the gap seals I'm talking
about on are the bottom.

Its a piece of clear plastic that spans the rather large gap on the
bottom. One side of the plastic is attached to teh wing and the aileron
slides on the plastic.

About a third of the way down on this page are some good pics of what I
mean.

http://home.hiwaay.net/~langford/troy/


This EZ has 4 trailing edge fences. one on each side of the aileron and
two more outboard of the aileron. No Vortilons though which are also
good at straightening out flow at slow speeds.

Scott


Al Gietzen wrote:
>
> Anybody flying with aileron gap seals? Notice a great improvement in
>
> climb and responsiveness?
>
> Scott;
>
> I have flown with the gap seal on, off, on again; and find no
> detectable difference. I suppose it depends on whether there is much
> of a gap in the first place.
>
> He's using the zig-zag tap in front of the rudders and says it more than
>
> doubled the effectiveness of them at low speeds. No noticeable
>
> reduction in cruise. Said he saw them on Klaus S. EZ.
>
> Double the effectiveness sounds like too big a change to be true.
> OTOH; I have never really felt that I had a lack of rudder response –
> but I guess I’ve managed to avoid landing in strong cross winds.
>
> He also said the trailing edge fences were a dramatic improvement with
>
> no cruise speed penalty.
>
> I have a fence on the in-board end of the aileron. I can’t tell you
> how much difference it makes because I put them on before ever flying.
> I had seen enough tuff-test info on EZs, and observed oil drop tracks
> on Velocity, to know there is span-wise flow under flow separation at
> high angles of attack. A fence could only help, and give better
> aileron authority at low speeds.
>
> Al
>
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