REFLECTOR: weatherproofing

Thu Jun 7 15:42:07 CDT 2007

Scott,

I was referencing the NACA in the roof for pressuring the overhead
plenum in the cabin for fresh air.  The NACA forms a pocket and the
pocket will fill with water.  There is a drain line molded into the
bottom of the pocket.  On one occasion, after a rain the with the line
pulled, the first time I hit the brakes, water came pouring out of the
overhead eyeballs--a cold surprise.  If the line becomes a little loose
in the molded area, water can seep down the side of the line and pool in
the cabin.

Of course, if you don't have a roof NACA between your two roof NACAs for
your engine, my comment would not apply. 

Chuck Jensen 

 -----Original Message-----
From: reflector-bounces at tvbf.org [mailto:reflector-bounces at tvbf.org] On
Behalf Of Scott Derrick
Sent: Thursday, June 07, 2007 3:47 PM
To: Velocity Aircraft Owners and Builders list
Subject: Re: REFLECTOR: weatherproofing

drain line???

Chuck Jensen wrote: 

	Another leak intrusion point into the cabin is the overhead
NACA.  Sometimes the drain line will have been moved/wiggled/bent enough
times to wear itself a little clearance around the drain line.  When
water accumulates in the NACA, it dribbles down the outside of the drain
line into the cabin instead of the inside the line and overboard.

	Chuck Jensen 

	 -----Original Message-----
	From: reflector-bounces at tvbf.org
[mailto:reflector-bounces at tvbf.org] On Behalf Of Ron Brown
	Sent: Thursday, June 07, 2007 1:36 PM
	To: Velocity Aircraft Owners and Builders list
	Subject: Re: REFLECTOR: weatherproofing

	Hi Kirk,

	There is another possible leakage source and that is the wing to
strake joints.  Water can migrate down the center spar into the cabin
and wind up in the floor.  I used white bathtub caulk (white and shinny)
and laid a small bead into the seam after masking with blue painter's
tape.  

	Ronnie

		----- Original Message ----- 
		From: Kirk Aragon <mailto:aragon_kirk at hotmail.com>  
		To: Velocity Aircraft Owners and Builders list
<mailto:reflector at tvbf.org>  
		Sent: Thursday, June 07, 2007 10:20 AM
		Subject: Re: REFLECTOR: weatherproofing

		John,

		I've also experienced standing water in my aircraft
after a storm (when the aircraft is parked). Initially, I thought it was
the weatherstripping around the doors, so I ordered some new
weatherstripping from the factory. Before I had the opportunityto
install it, I sat in the parked aircraft during a storm. I didn't notice
a single drop of rain entering via the doors. I also did not see any
puddling on the floorboards.

		I also became interested in the large holes on the sides
where the canard meets the fuselage. But my experience during the storm
made that hypothesis less likely. Why would I get water sometimes, but
not allways?

		So spring time came and I decided the aircraft needed to
be washed after sitting outside for the last three months. I didn't
notice any leaks during the wash of the fuselage. However, water started
to pool inside after I hosed down the newly de-gunked engine
compartment. The distinctive odor of "GUNK "ENGINE BRITE" ENGINE
CLEANER" assaulted my nose when I entered the cockpit.

		I noticied that water pooled on the lip of the bottom
cowling. I also noticed the water draining into the channels where the
oil hose goes to and returns from the nose mounted oil cooler. Eureka.

		I've purchased some high temperature sealant and hope to
close the gaps soon.

		Hope this helps

		Kirk
		N360TV

		> Date: Thu, 7 Jun 2007 08:39:40 -0500
		> From: aminetech at bluefrog.com
		> To: reflector at tvbf.org
		> Subject: Re: REFLECTOR: weatherproofing
		> 
		> I haven't noticed any water getting in while flying in
the rain, but a lot of water
		> comes in when it sits outside on the ground in the
rain.
		> 
		> John
		> 
		> Tom wrote:
		> 
		> > While putting the canard back on I noticed I could
see some daylight
		> > through the seams where the canard sits in the
fueslage. Also, there
		> > are the two fairly large holes on the sides for
movement of the canard
		> > control surfaces. Are these an issue when flying
through rain as far as
		> > the avionics possibly getting wet? thx Tom
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