REFLECTOR: Suprise in my duct

[Jeffrey Clough]

Water can travel a long way through the channels cut in the foam (to fit 
the mold?)....see my previous not about water coming up through the 
floor after filling my tanks with water to check for leaks..... Jeff Clough

Chuck Jensen wrote:

>Micro-ing a straw or some other permanent drain hole in place is probably a good-practice, but I believe the foam is closed cell so it shouldn't absorb/wick water.  Others may know better?
>
>Chuck
>
>-----Original Message-----
>From: reflector-bounces at tvbf.org [mailto:reflector-bounces at tvbf.org]On
>Behalf Of Juanita Londenberg
>Sent: Monday, June 20, 2005 1:43 PM
>To: Velocity Aircraft Owners and Builders list
>Subject: RE: REFLECTOR: Suprise in my duct
>
>
>I don't know what your fuselage is made out of, but
>our's has a layer of foam in between the layers of
>fiberglass.  I'm thinking water (or other liquid)
>could soak into the foam and eventually separate from
>the fiberglass??????????
>
>j
>
>--- Randy Wharton <rwharton at buckeye-express.com>
>wrote:
>
>  
>
>>Why do you need a straw or something similar? Why
>>won't the hole through the
>>fiberglass suffice?
>>
>>Randy W.
>>
>>-----Original Message-----
>>From: reflector-bounces at tvbf.org
>>[mailto:reflector-bounces at tvbf.org] On
>>Behalf Of Juanita Londenberg
>>Sent: Monday, June 20, 2005 12:29 PM
>>To: Velocity Aircraft Owners and Builders list
>>Subject: Re: REFLECTOR: Suprise in my duct
>>
>>Scott:
>>That's what I did for a drain hole in the strake
>>"cubby hole" at your elbow when you open the door --
>>only I used a scrap piece of some kind of the
>>aircraft
>>tubing that Brian had left over that's "never"
>>supposed to disintegrate.  -- We're not flying yet,
>>so
>>it hasn't gotten any real work out.
>>
>>Juanita
>>
>>--- Scott Derrick <scott at tnstaafl.net> wrote:
>>
>>    
>>
>>>Today one of my projects as to open up the left
>>>      
>>>
>>hand
>>    
>>
>>>duct so I could 
>>>prepare the oil line for my secondary oil
>>>cooler/cabin heater 
>>>installation. 
>>>
>>>This under the back seat oil cooler will be
>>>connected so its gets the 
>>>oil first, the nose cooler is second in line, have
>>>two 100 CFM fans, 
>>>with an air diverter to provide recirculated cabin
>>>heat or dump the air 
>>>overboard for additional engine oil cooling in the
>>>summer.
>>>
>>>I cut a 12 inch piece of the duct off and started
>>>      
>>>
>>to
>>    
>>
>>>pull wires out of 
>>>the way and noticed some really weird looking
>>>      
>>>
>>stuff
>>    
>>
>>>that completely 
>>>filled the cavitys between the oil lines, vacume
>>>line, throttle/mixture 
>>>cables, etc.  It looked like burnt wood chips or
>>>something? 
>>>
>>>It turned out to be rust particles from the
>>>throttle/mixture cables. 
>>>water/moisture had entered the duct and sat in the
>>>low spot and attacked 
>>>the steel wraps on the cables.  The outer wrap was
>>>completely gone and 
>>>it was working on the inner wrap.  The cables
>>>operation showed no 
>>>symptoms of an impending failure. The rust area
>>>      
>>>
>>was
>>    
>>
>>>about 18 inches 
>>>long. I ended up opening up more of the duct  so I
>>>could get all that 
>>>corrosion crap out of there.  The cables are of
>>>course junk.
>>>
>>>I had heard of people talking about drain holes in
>>>the ducts and though 
>>>yeah, that would be nice....
>>>
>>>It would be more than nice, it should be
>>>      
>>>
>>mandatory! 
>>    
>>
>>>If you don't have 
>>>them you should make it a priority!
>>>
>>>Any suggestions on how to make the drain holes? 
>>>I thought of drilling a 1/4"  hole, than flox in a
>>>thin straw through 
>>>the hole, then cut off the straw when cured?  Any
>>>better method?
>>>
>>>Scott
>>>
>>>
>>>
>>>
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>>
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>
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>  
>