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Mark and Ed,
Just as an update, controlling the cowl flap is not an issue
anymore since I installed the flap actuator mechanism under the
cowl. Cruise speed has not been measurably degraded, although it
certainly adds drag in the full-open position!
I get jealous when I read about full-power climbs on hot days with
no cooling issues! In reality, though, I have adequate cooling for
cross-country flight, local sightseeing/recreation, and formation work,
so have no immediate plans for further mods. I did put the
Spintech under the belly which is a little ugly, but the upside is that
it masks the turbulent flow from the cowl flap :-)
Bill
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Mark,
I considered them in my early days when I
was fighting high temps. But, once I solved that I have not really
considered them. The only person I am aware of using them is Bill
Eslick. You should contact him for details, but my impression was
that while they appear to work in aiding cooling, they also acted like a
speed brake dropping over 10MPH from his cruise. I believe he also
found it very difficult to close them down against the air flow out of
the cowl when he tried to close them to minimize drag.
But, again contact Bill for the full
skinny.
Ed
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