REFLECTOR: Cooling

[Velocity Aircraft Owners and Builders list]

I put a pair of VGs about six inches in front of the start of the ramp to the naca duct.   I also have them on the nose in front of the oil cooler naca duct, but about two inches in front of the ramp.
I also have a 173FG with an IO360 and roof naca ducts.   CHTs are fine, oil temp does climb with long taxis or a long climb out, but drop once you level off.    If you are flying lean of peak, this will drive
Up temps.


-----Original Message-----
From: Reflector [mailto:reflector-bounces at tvbf.org] On Behalf Of Velocity Aircraft Owners and Builders list
Sent: Monday, June 16, 2014 12:03 PM
To: reflector at tvbf.org
Subject: REFLECTOR: Cooling

Painted 444DX.  I will post pictures when I get some good ones and also send them to VOBA.  But smooth paint has changed the airflow around the fuselage and I now have cooling issues.  I have the NACA scoops on the top and an IO
360 in an SEFG.  Before I painted it, the surface was rough primer.  I had mild cooling issues before and put some 1.5" scoops at the rear of NACA ducts and they seemed to have helped a little, but they were ugly (to me).
So, with no duct extensions I am overheating on climb out and even cruise with the cg forward. 

Two questions: 1) I want to try vortex generators.  I already have them on the wing and canard, so why not.  I thumbed through the Reflector for the last two years and could not find where to place them.  Any ideas?  Also, is there an easy way to search Reflector other than month to month as I have been doing?

2) In talking to Alan  Shaw (yes I did find him, thanks to those who helped on that) and he suggested adding tabs near the root of the prop (3 blades, fixed pitch, Catto) to draw more air through.  Anyone tried that or have and suggestions on size, angle, etc.)

I have now flown over 25 Young Eagles.  They always clamor for rides my Velo over the RVs.  Cant imagine why.

PS. I suspect many of you are interested in antique cars. So you may want to follow my progress in the Great Race as I navigate a 1932 Buick from Maine to Florida, June 21 -29.  This will be my 5th participation in rally.
Follow my progress on http://www.greatrace.com/ as I get lost in Vermont or Georgia.  The results will be posted daily.  I will be in car #61.  If you look on the site you will see what cities we stop in.  Note that lunch stops are very brief, little time to be social, but evening stops are a concurs event with much social time.  If I am going to be in a city near you, love to meet you and show you the cars (there will be about 100 dating from 1910).


David Ullman
N444DX
President EAA 292
541-760-2338
david at davidullman.com





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