Hi Ron,

Fred has done a nice job, but they appear to be heavily influenced by WW2
style aircraft.  The best place to see near perfect examples of wing root
fairings is on gliders.  The examples I have seen are similar but smaller.

Any speed improvement in cruise comes from sealing the gap, not the
fairing.  What you should see an improvement in is climb and l/d ratio at
best speed.  This is because induced drag is a much larger component at
these speeds, where as parasitic drag is a larger component in cruise.

With that said, they are definitely worthwhile and they are on the long list
of crap that I will ultimately put on my airplane

Cheers,  Paul

On Tue, Sep 21, 2010 at 9:23 PM, <rparigor@suffolk.lib.ny.us> wrote:

> Hi Paul
>
> What's your take on Fred Kleins wing root fairings?
>
> Graham said this:
> Fred
> looks good to me, have a look at the fillet I did 10 years ago, not
> perfect and I think yours will be better.
> Ted Gladstone claims 4 kts I think.
> Just remember the wing root flexes up and down a couple or three mm. so
> the fairing must be flexible. Not a problem
> Graham
>
> Ron P.
>