REFLECTOR: Bildge Fan

[Brian Michalk]

Forcing air to do what you want is difficult.

I bought an electric fan that a lot of front wheel drive cars use for 
cooling when there is no airflow.  It's a "universal" fan which means I 
can remove the blades and flip them over.  I can also change the 
rotation direction.

My first attempt did not work very well.  I have two oil coolers in the 
nose.  The lower one being mainly for engine, the top one being for 
cabin heat.

I wanted to blow cabin air through the top cooler and with a flapper 
valve, either vent it overboard, or recycle it into the cabin.  The 
problem is that the fan was blowing into a reducing cone that mated to 
the cooler, and there was practically no airflow.  So, I flipped the 
blades and changed rotation to draw from the oil cooler.  I can keep my 
oil temps below redline on the ground even when I am tuning the engine 
at high power.

The problem is that I don't have any real control of the cabin heat with 
the direction of flow.  I do plan on trying an arrangement of 
centrifugal blowers to do what I need.  A blower will produce high 
pressure ratios, and that is what you need.

On 2/7/2013 4:50 PM, Ruben Creus wrote:
>
> Hi all,
>
> I know I ask this question every year, but I keep forgetting the 
> answers when it gets warm.
>
> I am thinking on installing a bilge fan in front of the oil cooler and 
> block the external air to recycle cabin air and hopefully getting 
> better heat in the cabin. I remember from last year that someone 
> talked about bilge fans and its CFM...   so I wonder if any of you 
> have any input on this.
>
> Again, I am sorry to ask again every winter but my brain must be too 
> cold to remember what was said last year.
>
> *Ruben G. Creus*
>
> Ë+1.571.215.0025
>
> *ruben at vainneg.com <mailto:ruben at vainneg.com>
>
>
>
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