REFLECTOR: Cabin Heat

Sun Jan 15 11:24:28 CST 2012

Hi Dave,

I have heard that those small heaters work well for defrosters too, , but
you need to watch how close it is to the plexi- one of the other guys
(Jean?)uses one regularly, but it crazed the plexi at the bottom where it
sits because he had it too close. I was going to try just running s small
bilge blower with some hose that would pick up right near the heat vent on
the floor and blow up on the windshield- I didn't what to have to put a
damper door in there if I could avoid it.

Alex

From: reflector-bounces at tvbf.org [mailto:reflector-bounces at tvbf.org] On
Behalf Of David Scharfenberg
Sent: Saturday, January 14, 2012 10:57 PM
To: Velocity Aircraft Owners and Builders list
Subject: Re: REFLECTOR: Cabin Heat

Alex,

You have a better fan than I tried.  I may work on the heat issue again
sometime, but sealing off the leaks (especially around the RG nose gear)
made a huge difference.  I also have a small electric heater that I can plug
in and use on cold days.  I haven't tried it yet though.

Dave

On Jan 14, 2012, at 10:24 PM, Alex Balic wrote:

Hey Dave, I have a Toyota corolla fan recirc. only system on mine- it even
has the resisters built in, so I worried it to a 3 pos switch so I have 2
speeds- pulls from the top of the canard through a block off bulkhead, blows
it back down at the feet- have not been flying yet, but I have ground run
quite a bit, and  it definitely gives me auto type heat temps and amounts
too, which is good, because I live in Texas and  I absolutely hate being
cold...I do have the luxury of having hot coolant running through it though,
but should not make a huge difference except maybe with the transfer
efficiency of the glycol vs. oil.  I also have a small heater core with slab
mounted fans that I will add for the rear pass if it comes to that..

From: reflector-bounces at tvbf.org [mailto:reflector-bounces at tvbf.org] On
Behalf Of David Scharfenberg
Sent: Saturday, January 14, 2012 5:16 PM
To: Velocity Aircraft Owners and Builders list
Subject: Re: REFLECTOR: Cabin Heat

I've fought the cabin heat issue for years and sealing all of the cold air
leaks up front seems to be the first and most important step.  After that,
blocking off about half of the front oil cooler with duct tape helped.

I tried to block all of the outside air to the front cooler and recirculate
cabin air through it with bilge fan.  That just resulted in too high oil
temp and virtually no cabin heat.  I think the static pressure was too much
for the fan I used.  A centrifugal fan may have worked, but I just had no
place to put one.

Dave Scharfenberg

Std/RG

On Jan 13, 2012, at 6:24 PM, 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.  

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.

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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