Jeff,
Not an elegant solution, but for much of the year up here I have the
oil cooler partially blocked off with duct tape.
Normally will give me oil and coolant temps of around of around 185 F
in cruise.
WIsh it was 30 F here, this AM was 12 F with 2 feet of snow.
I need to install cabin heat, but will not get enough hot air from
the radiator, the front port exhaust pipe seems to offer the best
location for a heat muff.
If anyone has done this, I would like to get details.
Dave C-FBZI
On 2-Jan-10, at 6:56 PM, JEFF ROBERTS wrote:
>
> 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:
>
>> grenoble.fr>
>>
>> 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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