Gilles & All,
Yes the manuals state the optimized temps but my question is this.
Keeping in mind I have no engineering or mechanical background I
simply would like to know if there are known minimum sustained CHT
temps and if so what have others done to raise them? I have not flown
the Europa in very cold air and now that I have a heater I was
wondering if there are minimums I need to watch out for. For now I'm
only monitoring CHT and Oil temps.
Best Regards,
Jeff R. N128LJ Gold Rush
On Jan 2, 2010, at 2:41 PM, Gilles Thesee wrote:
> >
>
> JEFF ROBERTS a crit :
>>
>> With all the starting temps being discussed can anyone spread some
>> light on minimums on cruising temps. Cold weather operation in the
>> manual covers carb icing concerns but it doesn't really cover
>> cruising temps. Maybe there isn't a reason to cover it. It's about
>> 30 F outside right now. Other then maybe covering some of the
>> radiator can anyone suggest other possible solutions to keeping the
>> water temps up? Is there a minimum CHT we should watch out for?
>>
> Jeff and all,
>
> The Rotax manuals do state the optimum cylinder head and oil temps.
> One way to ensure proper temperatures is to use a correct cooling
> air duct and cowl flap. Thus when you reduce airflow through the
> radiators, you also reduce cooling drag.
> Other ways include providing too large an air supply to the
> radiators and blanking them up, or using an oil or water thermostat.
> But your airplanes experiences excessive cooling drag all the time...
> Some designer also combine poor cooling with excessive drag ;-)
> The basics of radiator aerodynamics can be seen here :
> http://contrails.free.fr/engine_aerodyn_radia_en.php
>
> The Europa cooling can be optimized, but this may imply some
> redesign of the cowling and radiator ducts.
>
> Happy New Year,
> Best regards,
> --
> Gilles
> http://contrails.free.fr
>
>
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