REFLECTOR: Uneven Cylinder Cooling

[John Dibble]

Air escaping around the outer edges of the cylinders may actually help.  
I've improved cooling of specific cylinders by increasing the gap 
between the plenum and the cylinder.  I believe this works because most 
of the cooling occurs at the cylinder top (or bottom depending on 
direction of air flow) and the gap allows more cooling air to flow over 
the top of the cylinder.

John

On 3/11/2012 12:02 PM, Richard J. Gentil wrote:
> I'm about 20 hours into the flight testing of my SERG with the dual overhead  NACA cooling plenum on a Lycoming IX-390-X and three bladed MT Prop.
>
> I have added aluminum deflectors in the runners of the plenum to direct more air to the number 3&  4 cylinders and made sure that the plenum does not have any air escaping around the outer edges of the cylinders but no luck so far.
>
> Here are the numbers  getting on the engine:
>
>
>
>
> Richard
>
> Sent from my iPhone 4 Classic
>
>
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