> As you can see filling the gap did nothing to improve my cooling, I must
be getting considerable cooling to the gear box from this gap.
 > I have not done any pressure test inside the cowl, but I have monitored
the inside cowl temps in the past, they were running around 100-115 degrees
so I just don't bother anymore.
 > I have not had any cooling issues for the last 1 1/2 years, so if it's

not

broke don't mess with it.

Jim,
You can determine whether air is going into or out of the spinner gap by
smearing a little crankcase oil around the opening, go fly, and come back and
look at the flow streamlines.

Bill Schertz
KIS Cruiser #4045

 
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