I've used Evans from the start and never had a problem. (touch wood).
You are right in saying it was flavour of the month but seems that the
glycol mix is now the recommended way to go.
Best wishes,
Steve
G-SMDH - back in the air today!!!!!
----- Original Message -----
From: "Rowland Carson" <rowlandcarson@gmail.com>
Sent: Sunday, May 15, 2016 7:14 PM
Subject: Europa-List: coolant choce and temperature monitoring questions
> <rowlandcarson@gmail.com>
>
> I thought Id got all the instrumentation I needed sorted out, but Ive
> come across the following items in the Rotax Installation Manual:
>
>
> "2 different types of coolant are permitted.
>
> Type 1:
> - Conventional coolant based on ethylene glycol
> Conventional coolant is recommended as it is commonly available and has a
> greater thermal heat transfer capability.
> . . .
> Permanent monitoring of coolant temperature and cylinder head temperature
> is necessary.
>
> Type 2:
> - Waterless coolant based on propylene glycol
> Waterless coolant is recommended if the design of the aircraft can not
> maintain the coolant temperature limit.
> . . .
> Permanent monitoring of cylinder head temperature is necessary.
> Additional monitoring of the actual coolant temperature is possible but
> not necessary for waterless coolant.
>
>
> I seem to recall that Evans (waterless) coolant was the flavour of the
> month some time back, and then it fell out of favour. I understand it's
> more expensive than ethylene glycol coolants as well as causing the engine
> to run hotter (because it doesnt transfer heat so well).
>
> However, it appears from the above Rotax manual extracts that if one wants
> to use the cheaper ethylene glycol option, its necessary to have a
> coolant temperature gauge as well as the CHT monitoring. And elsewhere in
> the manual coolant temp monitoring is required during the test flying
> period even with waterless coolant.
>
> So, the question is - what do folks in UK generally use in the coolant
> system? And if conventional ethylene glycol, what type of coolant
> temperature sensor do they have and where is it fitted?
>
> All advice born of experience welcome.
>
> in friendship
>
> Rowland
>
> | Rowland Carson ... that's Rowland with a 'w' ...
> | <rowlandcarson@gmail.com> http://www.rowlandcarson.org.uk
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>
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>
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