REFLECTOR: Velocity heater

John Dibble aminetech at bluefrog.com
Tue Jan 8 13:25:19 CST 2008


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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