REFLECTOR: Engine cooling NACA scoops

[Scott Derrick]

I purchased a blank plenum, with connecting tubes and premolded NACA's,
from Velocity for a very reasonable price.

Scott

mike.roberts at kennametal.com wrote:
> My plane (2003 vintage XLRG w/ IO550) has the NACA scoops on top of 
> fuselage and vortex generators just in front of each NACA scoop opening. 
> It works extremely well (maybe runs too cool).
> 
> I didn't build the plane so I don't have any templates to provide you.
> 
> Mike W Roberts
> Director of Sales, Americas
> Metalworking Solutions & Services Group
> Kennametal Inc.
> 1662 MacMillan Park Drive
> Fort Mill, SC 29707
> Office 803-578-4590
> Cell 843-597-2293
> email: mike.roberts at kennametal.com
> 
> Imperfect action is better than perfect inaction....DO IT NOW...
> 
> 
> 
> 
> 
> 
> Dave Philipsen <velocity at davebiz.com> 
> Sent by: reflector-bounces at tvbf.org
> 07/17/2008 08:14 AM
> Please respond to
> Velocity Aircraft Owners and Builders list <reflector at tvbf.org>
> 
> 
> To
> Velocity Aircraft Owners and Builders list <reflector at tvbf.org>
> cc
> 
> Subject
> REFLECTOR: Engine cooling NACA scoops
> 
> 
> 
> 
> 
> 
> I have been struggling with marginal cooling on my STD FG equipped with 
> armpit scoops.  The only way I can keep cool enough during cruise is to 
> fly above 6000 feet and run LOP.  I have been somewhat successful at 
> bringing the temps down by repairing/reworking the baffling and seals as 
> well as doing a little rework on the scoops themselves but I'm still not 
> happy with it.  I'm seriously thinking about retrofitting it with the 
> overhead NACA  vents and downdraft cooling.  My question is:  Does 
> anyone have templates that I could borrow/acquire so I don't have to 
> guess about the size and positioning?  Also, should I expect to see a 
> small improvement in cruise speed with the NACAs after removing the 
> armpit scoops?
> 
> 
> 
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