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1. 12:46 PM - Re: Flap trailing edge thickness (Clay R)
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| Subject: | Re: Flap trailing edge thickness |
--> RV9-List message posted by: Clay R <clayr_55@yahoo.com>
I forwarded this question to an airfoil designer..
Here's his reply to my question of a sharp vs. 1/8"
square trailing edge.
-Clay
Theoretically, a sharper edge is better because of a
better defined
stagnation point, but in real life it won't make any
difference at all.
The
boundary layer is pretty thick by the time it reaches
that far anyway.
John
--- Gerry Filby <gerf@gerf.com> wrote:
> --> RV9-List message posted by: Gerry Filby
> <gerf@gerf.com>
>
>
> Folks
>
> I used T-88 expoxy between the skins and AEX wedge
> of the
> trailing edges of the elevators, rudder and
> ailersons with good
> results - very straight and even.
>
> Today I completed the right flap and realized that I
> had a
> thicker layer of epoxy between each skin and the AEX
> wedge.
> Consequently the very edge of the trailing edge is a
> little
> thicker than my previous efforts - I would say its
> 2.5 mm at
> worst and generally 2mm along the span. My other
> effots were
> about 1.5 mm.
>
> I've trawled the lists and the Net but haven't found
> anything
> definitive - is it a bad think to have that thick a
> trailing
> edge ? I see some notes that you want a "knife
> edge" if you
> can get it.
>
> g
>
>
==========================================================
>
> Gerry Filby
> gerf@gerf.com
>
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