REFLECTOR: Velocity heater

[Rene Dugas]

Dave, I have a scoop mounted into the bottom of my pilot side NACA
routing air directly down into the firewall mounted oil cooler.  In the
winter I place a block of foam in this scoop down against the cooler so
it can not come up and blow back onto my engine to increase the heat to
the front cooler(heat exchanger) to supply more heat to my front bilge
blower.  I frequently fly with both coolers blocked into late spring
with temps up to 90 degree outside.  Peak temps recorded so far are 212
degrees oil with over 500 hours on the plane.
Rene'

-----Original Message-----
From: reflector-bounces at tvbf.org [mailto:reflector-bounces at tvbf.org] On
Behalf Of David Scharfenberg
Sent: Tuesday, January 08, 2008 3:12 PM
To: Velocity Aircraft Owners and Builders list
Subject: Re: REFLECTOR: Velocity heater

That would be ideal, or even a cable operated air door.  I'm not ready 
to get into any major NACA scoop work right now.  If I find myself 
flying from cold to warm I can always just close the existing heater 
door to close off the scat tubes to the cabin.  Hopefully the cabin air 
blowing through the oil cooler along with the rear cooler would keep 
the oil from getting too hot.

Thanks,

Dave



On Jan 8, 2008, at 1:25 PM, John Dibble wrote:

> Dave,
>
> If I do more cold weather flying, I'm thinking of trying a flap in the

> naca scoop that
> the blower would force open and block the fresh air.  That way it is 
> all automatic and
> no manual closing of the naca scoop is required.  Then on a long trip 
> from FL to NY
> you can have it both ways.
>
> John
>
> David Scharfenberg wrote:
>
>> Thanks Rene
>>
>> My plan now is to make a removable cover for the NACA scoop in front 
>> of
>> the oil cooler.
>>
>> Attach a bilge blower onto the close-out bulkhead above the canard.
>>
>> Run SCAT tubing from the blower to a hole in the back of the NACA 
>> scoop.
>>
>> Make a cover for the above mentioned hole in the back of the NACA 
>> scoop.
>>
>> In the spring, summer, and fall I will cover the hole and uncover the
>> NACA scoop.
>>
>> In the winter I will cover the NACA scoop and uncover the hole.
>>
>> I'll let you know how it works out.
>>
>> Dave
>>
>> On Jan 8, 2008, at 12:04 PM, Rene Dugas wrote:
>>
>>> Dave, just a thought that I tried and worked well was to suck air
out
>>> of
>>> one front foot well and blow it into the other since you already
have
>>> the scat tubing and with the flapper valve closed the cavity behind 
>>> the
>>> oil cooler gets quite warm although not hot.  I placed a bilge fan
>>> blower here and recirculate with minimal added work and significant
>>> heat
>>> if I duct tape over the oil cooler fins for winter flying.  I do not
>>> need either oil cooler for winter flying with my IO 540.  I also
have
>>> the 12v blanket and stay quite comfortable.
>>> Rene'
>>
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