REFLECTOR: Use of VGs toaid cooling

[John Dibble via Reflector]

You may be able to explore more options on the ground using a leaf 
blower, if you can get similar pressure differentials with the blower 
compared to flying.

John

On 9/30/2014 3:24 PM, David Ullman via Reflector wrote:
> I did not play with spacing.  I used what I found in the reference in the paper.  I had already taken about 20 data points (not all in the article) and was ready to finish.  I could have tinkered more with spacing and position in front of the NACA ducts.  But, it was time to quit and I had good enough temperatures.  I am sure there is more to be had.  No way did I find the sweet spot on the first try.
>
> I initially used bent Al and riveted them on.  When they worked I took them off, ground off the finish on the roof down to glass and used cyanoacrylate to glue on thin pieces of premade fiberglass sheet cut to shape (you can get sheets already made in varying thicknesses).  I then 2-bid each side with a flange onto the roof, filled sanded a repainted the roof.  There are no flanges to be seen as they are flush with the roof. I work with a painter who is a master at touching up changes so you cant ever see them.  We use a pigment coat and a clear coat.  We also put a lot of things together with super glue and accelerator.  You can work really fast and then glass over for strength.    Just take care when you sand, the dust is an irritant to eyes and nose.
>
>   
> David Ullman
> N444DX
> President EAA 292
> 541-760-2338
> david at davidullman.com
>
>


---
This email is free from viruses and malware because avast! Antivirus protection is active.
http://www.avast.com