Frans=2C
I would be most interested in a few more details as my Motor Glider is just
going through the certification process for the LAA in the UK=2C and this
would be a very useful modification to include.
Regards
Ian cook
> Date: Wed=2C 4 Jun 2014 14:13:14 +0200
> From: frans@privatepilots.nl
> To: europa-list@matronics.com
> Subject: Re: Europa-List: coolant thermostat uk
>
>
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> On 06/04/2014 12:24 PM=2C GTH wrote:
>
> > Concerning the coolant thermostat option=2C the question is=2C do you
> > value lightness=2C simplicity and low drag or not ? A thermostat
> > helps oil *warming*=2C not cooling=2C at the price of additionnal
> > weight and constant cooling drag penalty.
>
> I was waiting for someone to bring this up. =3B-)
> It is *much* better to create a cowl flap at the air exit to regulate
> the amount of cooling air through the system.
> 1) It lowers drag=2C and thus gives you either less fuel consumption=2C
> extended range=2C or higher speed.
> 2) It is easier and safer. With the well known trim servo it is easy
> to set up a flap in the air exit that can be retracted against the air
> flow. If it breaks=2C the air flow will push the flap open.
> Cooling thermostats come with extra hose connections=2C and are not
> without issues themselves.
>
> I have such a system and it works perfect. With a trim alike button I
> can modulate the cowl flap and see an almost immediate response on the
> water temp gauge.
> I can do something that a coolant thermostat not can do: anticipate.
> Before commencing a long descents (or before starting to climb) I can
> adjust the cowl flap. Give some extra cooling before starting a
> prolonged climb=2C or let the engine heat up a bit more before pulling
> the power for a long descent.
>
> Frans
>
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