I know this is off-topic, but has anyone measured or have a good idea
of the maximum temps expected inside the cowl?

I'm considering using thermal fuses as fire indicators inside my
cowling.  This is important in a pusher, since you  can't see the
engine compartment.  These inexpensive solid state thermal fuses open
at various temps.

Knowing what our usual water and oil temps should be, as well as
exhaust temps, I wonder how hot a cowl should get at a maximum, before
a fire is probable.  130 C?  150 C?  A composite cowl will be a
limitation, too, as they may degrade at temps in this range.

Scott Gettings

My guess is at least 150 F and maybe more under hot soak conditions.
It all depends on the rad location and how well the cowl is vented.
In the case of the glass goose you should be able to vent the cowl
well without adding a lot of drag. Where is the rad going?

Paul Lamar

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