> If this thermostat would hang closed, you would notice a rise in oil
> temperature,
if it stays open, oil would not reach a sufficient temperature. IMHO, a
manual operated flap or anything that adds to (this new-by) pilot workload is
more error-prone.
>
>
>
Hi all,
Although the following doesn't apply to a Europa, it may be of interest
regarding Rotax 914 setups.
In our project, we decided to make a cowling from scratch, and I had the
opportunity to design a radiator duct with cowl flaps. A short summary
of the design principle can be viewed on my "wind tunnel" web pages.
The airplane has been flight tested from -14C to +37C with perfect
ease of temperature adjustment. Operating the cowl flap is a breeze, and
you always have a few minutes to adjust temperatures to your taste
within 5C of target.
We had considered using a thermostat, but whereas it solves the
temperature issue, the drag is always high. On the other hand, drag
decreases when you close the flap.
Besides, if the thermostat fails in the by-pass position, the
temperature rise will be fast and very harmful to the engine.
From the messages about blocking the radiators, or adding thermostat to
cowl flaps, I have the feeling that the cooling of Europas could benefit
---From this little research work.
FWIW,
Regards,
Gilles Thesee
Grenoble, France
http://contrails.free.fr
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