REFLECTOR: Altimeter v. Airspeed

[Alex Balic]

You can also use the soft Velcro on the exterior if the rod and pot in the
plastic tube that Chuck suggested so the Velcro acts as very low drag
packing on the rod- won't work of course if you don't have the concentric
tube setup though....

-----Original Message-----
From: reflector-bounces at tvbf.org [mailto:reflector-bounces at tvbf.org] On
Behalf Of Chuck Jensen
Sent: Monday, January 07, 2008 8:13 AM
To: Velocity Aircraft Owners and Builders list
Subject: Re: REFLECTOR: Altimeter v. Airspeed

Tom, I was just kidding about it being so tight...gawd I hate it when people
take me serious--they shouldn't!  Actually, I have been able to get things
pretty tight but not so that it would hold smoke or anything.  The elevator
tube penetration through the fuse wall on the XLRG is a 1" tube that rotates
around its center axis and do does move laterally, so sealing it was easy.  

I took 1" shower rod protector (that thin, light walled plastic tube one can
put over your shower rod to keep it from rusting, especially if you use
rebar as the shower rod), cut of a 2" piece and slipped it over the elevator
tube and then caulked around it between the protector and the fuse.  The
elevator tube rotates inside the sheath with no noticeable drag and there is
virtually zero in leakage in that area.  Sealing up a laterally traveling
tube would be tricky-business, as you are already aware. A boot of some sort
may work, but in all likelihood, some clever devil out there has solved the
problem in an elegant manner.

Chuck Jensen


-----Original Message-----
From: reflector-bounces at tvbf.org [mailto:reflector-bounces at tvbf.org]On
Behalf Of Tom
Sent: Sunday, January 06, 2008 8:16 PM
To: reflector at tvbf.org
Subject: REFLECTOR: Altimeter v. Airspeed


Interesting that yours is tight, I've got all kinds of air leaks. I've 
not been overly concerned as most flying is in Florida. Curious though, 
the worst leak is the large holes where the canard elevator tubes rotate 
up and down with pitch inputs. There has to be a gap between the tube 
and fuselage for elevator movement, how do you keep that area from leaking??
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