REFLECTOR: Velocity heater

[David Scharfenberg]

Rene,

I think I'm getting plenty of hot oil up front.  Oil temps are 
typically in the 190's.  I have covered 1/2 the front cooler with duct 
tape when it's below around 20 degrees, and I can get the oil temp up 
to around 200.  Of course it still won't keep up on days like that.

Dave


On Jan 8, 2008, at 5:06 PM, Rene Dugas wrote:

> 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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