REFLECTOR: Plenum drain?

[Andy Millin]

Don,

 

I have an FG.  You are building an RG.  I don't know the best routing to
stay clear of your gear mechanism.

 

If you look at my picture 1317 you can see my drain.  It parallels the fuel
vent line and exits the floor of the aircraft pretty much straight down.  I
do have some curves to accommodate the spar and the landing gear bow.

 

I would guess the vent and drain are 1" to 1-1/4" apart.

 

Andy

 

From: reflector-bounces at tvbf.org [mailto:reflector-bounces at tvbf.org] On
Behalf Of Don Johnston
Sent: 11-13-2009 9:31
To: reflector at tvbf.org
Subject: REFLECTOR: Plenum drain?

 

Andy,

 

I figured that was a reason. I wonder if the top of the engine compartment
could have higher pressure than the inside of the plenum? Doesn't seem
likely. Maybe a check valve? 

 

Okay, now it's getting too complicated. :-) 

 

What's the typical routing of the drain once it leaves the plenum? I'd
imagine over to the side and then down to the center at the bottom of the
fuselage.

 

-Don

 

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You could be allowing the gasses in the cowl to backflow into the plenum and
then the cabin. Not sure. I've never seen anyone do it that way before. 

Andy

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