Hello Ron,
Yes I changed the cooling air intake and the shape of the cowling on my XS.
At the moment the results are good. But we anyway need a controlable system
for the changing conditions and temperatures. I am working on a dynamic
balanced flap attached to the existing cooling duct aft of the oil radiator
and fitting in the cowling. At the moment it's to early to show what I am
doing because I need more tests and experience in flap control. Something
for long winter evenings. But if the papermen find that this is a
modification needing formulas and engineering reports than I put on the good
old cowling as ugly as it is.
Karel Vranken, F-PKRL # 447 XS Rotax 912 ULS, Airmaster CSU only 16 hours
and waiting for the papermen's final certificate.
----- Original Message -----
From: <rparigor@suffolk.lib.ny.us>
Sent: Thursday, November 30, 2006 6:01 PM
Subject: Europa-List: Cooling diffuser
> Has anyone changed the cooling air intake location and shape (diffuser)
> for a XS / Rotax install?
>
> It seems that if the duct was slight shorter with a proper shaped lip,
> something like the Katana Extreme photo attached, may be a better
> mousetrap??
>
> By having the entrance of the diffuser airfoil shaped, if done properly
> with the flat side on the inside, it could decrease speed and increase
> pressure which is exact what we want, and even give a bit of forward
> thrust.
>
> Also included a picture of Gilles diffuser.
>
> Ron P.
>
>
>
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