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                           Europa-List Digest Archive
                                      ---
                     Total Messages Posted Fri 03/26/21: 3
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Today's Message Index:
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     1. 03:12 AM - Re: Re: Vents  (D McFadyean)
     2. 07:57 AM - Re: Skysports bendable capacitive probe calibration?  (DannyBo)
     3. 02:28 PM - Re: Vents  (Griffo)
 
 
 
________________________________  Message 1  _____________________________________


Time: 03:12:55 AM PST US
From: D McFadyean <ami-mcfadyean@talktalk.net>
Subject: Re: Europa-List: Re: Vents


I found that small NACA vents in the standard position didn't flow any air at all,
without the addition of a VG in front of the vent (after which the vent makes
a blast, and is quite noisy too).
Which suggests there's a bubble forming at the aft edge of the cowling. But I've
not been able to detect a bubble using oil-streak.
Perhaps there's a Reynolds number limitation on how NACA vents work??

Duncan McF.
> On 26 March 2021 at 00:04 Griffo <scangriffin@bigpond.com.au> wrote:
> 
> 
> 
> Nice work KJ.
> 
> I am surprised that the NACA vents do not deliver copious quantities of fresh
air
>  
> I live in Australia (very hot) and have always found them to be very effective
when made to correct dimensions , located appropriately and sized - 
> 
> I see I gave the wrong information for  Peter Anson  Engineering - hope this
works:
> 
> http://www.ansoneng.com/
> 
> He makes a nice selection of different NACA vents & ducting
> 
> --------
> 46
> 
> 
> 
> 
> Read this topic online here:
> 
> http://forums.matronics.com/viewtopic.php?p=501098#501098
> 
> 
> 
> 
> 
> 
> 
> 
>


________________________________  Message 2  _____________________________________


Time: 07:57:22 AM PST US
Subject: Europa-List: Re: Skysports bendable capacitive probe calibration?
From: "DannyBo" <ks5560590@gmail.com>


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Read this topic online here:

http://forums.matronics.com/viewtopic.php?p=501107#501107


________________________________  Message 3  _____________________________________


Time: 02:28:05 PM PST US
Subject: Europa-List: Re: Vents
From: "Griffo" <scangriffin@bigpond.com.au>


Hi Duncan,

First rule of effective venting is: Location, location, location --------

Then comes design, as in shape & proportions NACA vents must be correctly proportioned
to work effectively, not just look the part (as in may auto types)

Then comes size.

Lastly, exit air rout & size

--------
46


Read this topic online here:

http://forums.matronics.com/viewtopic.php?p=501109#501109


 

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