REFLECTOR: Cooling

Velocity Aircraft Owners and Builders list reflector at tvbf.org
Tue Jun 17 23:18:45 CDT 2014


That is the way I had them before ...... Thanks ....... I guess I will 
install them the same way again.

Ron
On 6/17/2014 7:26 PM, Velocity Aircraft Owners and Builders list wrote:
> If you can imagine which way the vortex is spinning, I believe you 
> want to place it such that the vortex is captured by the side of the 
> NACA.
>
> I.e., looking at it from the front, the VG to the left of the NACA 
> centerline needs to angle to the left.
> http://wiki.velocityoba.com/images/9/90/VV_naca2.jpg
>
> On 06/16/2014 11:53 AM, Velocity Aircraft Owners and Builders list wrote:
>> Like you just got my plane painted. I had VG 8" in front of the nacas 
>> when in primer and had no cooling
>> issues. Now that I have paint on it and have not reinstalled the VG's 
>> yet the temps are a little higher about
>> 20 Degs. I will be installing the VGs back on to see if it returns to 
>> my normal temps. MY question
>> is similar   which is better for installation of VG's with them 
>> pointing into the wind >    or pointing the direction of the wind    
>> <    .  Does it make a difference ?
>>
>> Ron
>> On 6/16/2014 11:03 AM, Velocity Aircraft Owners and Builders list wrote:
>>> 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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>>
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>
> _______________________________________________
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>
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