REFLECTOR: Plenum drain?

[Jim Agnew]

See Attachment  
 
James F. Agnew
Jim_Agnew_2 at Yahoo.Com
Tampa, FL
Velocity 173 Elite Aircraft Completed & Flying




________________________________
From: "gattenby at tulsaconnect.com" <gattenby at tulsaconnect.com>
To: Velocity Aircraft Owners and Builders list <reflector at tvbf.org>
Sent: Mon, November 16, 2009 1:42:05 PM
Subject: Re: REFLECTOR: Plenum drain?


-6d is for 3/8 tube. 
What is the current recomendation for vent tubing.
Way back when, my kit shipped it 1/4 alum tubing. -4d
I know that there was alot of talk years ago when there was several planes that had uneven fuel feed problems, about going to 3/8 tube.  

I'm in the process of ordering the fittings,  
What is the consensus of tubing size 3/8 vs 1/4 tube for the fuel vent system?

Noel


On Fri, 13 Nov 2009 06:59:22 -0800 (PST)
 Andrew Ellzey <ajlz72756 at yahoo.com> wrote:
> Don,
> 
> I installed a AN816-6D fitting for my drain. I also made 
>a dam at each end to keep water from going forward and 
>aft in the plenum. I felt like that if your aircraft is 
>parked on the ramp during a rain storm, that you could 
>get quite a bit of rain in the plenum. I made the drain 
>removable because the drain line goes straight down and 
>in front of my sump tank. The other reason is so that it 
>can be removable in case it gets clogged with trash and 
>needs to be cleaned out. See attached photo's
> 
>  
> Andy Ellzey
> 
> 
> 
> ________________________________
>From: Don Johnston <don at numa.aero>
> To: reflector at tvbf.org
> Sent: Thu, November 12, 2009 7:50:04 PM
> Subject: REFLECTOR: Plenum drain?
> 
> 
> I’m getting ready to install my overhead plenum. For the 
>drain, it looks like most people run it out the bottom of 
>the plenum and then (I guess) down the inside of the 
>fuselage and out the bottom. 
>  
> Rather than run all that tubing, why not run a small 
>piece of nylaflo (or aluminum) through the firewall and 
>then let the water simply run down the outside of the 
>firewall?
>  
> I haven’t seen anyone do this so I’m guessing there’s a 
>reason.
>  
> -Don
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