REFLECTOR: Cabin Heat

[John Dibble]

Don Johnston wrote:

> Ruben,
>
> Here's my theory: The temperature of the air is only going to increase
> so much by passing through the oil cooler.  On a cold day in the north
> with the OAT at -10F, I'm guessing an increase of 50F from passing
> through the oil cooler. This means 40 degree air blowing in.

If the diverter flap completely closes the exit duct, the amount of
cooling air is reduced causing the oil temp to increase and the air
heats up more.

>
>
> So I installed a damper between the front/side NACA and the oil
> cooler. Moving the damper to block the outside air uncovers a duct
> from the cabin which is fed by a blower. This way I am recirculating
> cabin air through the oil cooler at a lower speed.

I installed something very similar.  I use it for cooling while
taxiing.  The flap operates automatically when the blower is turned on.
It works well.  I had plans to run a duct from the cabin to the blower
to recirculate air, but so far haven't needed that.

John

>
>
> In a couple years when I'm flying I'll let you know if it works. :-)
>
> -Don
>
> From: ruben at vainneg.com
> To: reflector at tvbf.org
> Date: Thu, 12 Jan 2012 21:35:34 -0500
> Subject: REFLECTOR: Cabin Heat
>
> Hi all,
>
> When I am flying below 0 Celsius outside temperature, the oil cooler
> seems to not heat enough the air coming into the cabin. The other day
> at -12C outside it was very chill in the cabin. I heard some of you
> partially cover the cooler, but not sure if the can be risky if
> covered too much. Has any one had any experience trying to get more
> cabin heat?
>
> Ruben
>
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