Here is a sketch of the cowl flaps I intend to use on the Kis Cruiser.
I have a turbo engine so I expect about the same amount of HP as
my C182. I therefore sized the cowl flaps the same. You might think
they are too big but I don't :-)

The air cooled  VW engine thermostat shown is a powerful little mother.
It can hold at least 25 pounds when closed so the cowl flaps
will be spring loaded to open. It also moves about 1.25 inches from
closed to open.

Paul Lamar
 
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