REFLECTOR: main gear brake lines

Jorge Bujanda bujanda at dslextreme.com
Wed Feb 7 22:11:37 CST 2007


Not even close to flying yet but I probably bought the same cloudy tubing
Rene used.  It is 3/8" OD 1/4" ID polyethylene tubing from HD (very cheap
and light).   I used it as conduit to guide the NylaFlow from the gear
bulkhead to the bottom of the main gear.  I used hot glue to keep it in
place and glassed over them.
To minimize heat transfer, I plan to cover the NylaFlow with Viton tubing
and fiberglass sleeving between the conduit exit at the bottom of the main
gear leg and the caliper fitting.

http://members.dslextreme.com/users/jbujanda/Construction_files/mgconduit1.J
PG
http://members.dslextreme.com/users/jbujanda/Construction_files/mgconduit2.J
PG
http://members.dslextreme.com/users/jbujanda/Construction_files/mgconduit3.J
PG

Jorge



-----Original Message-----
From: reflector-bounces at tvbf.org [mailto:reflector-bounces at tvbf.org] On
Behalf Of Rene Dugas
Sent: Wednesday, February 07, 2007 4:11 PM
To: 'Velocity Aircraft Owners and Builders list'
Subject: Re: REFLECTOR: main gear brake lines

I used a cloudy white tubing from Home Depot.  I do not remember the
size.  I carried a piece and slipped the nylaflow through to confirm the
passage.  Has worked well and is still movable at 450+ hrs flying.  Plan
to replace the nylaflow at 5 yr annual this winter.  I covered mine with
glass and I have not upgraded to the carbon.  I have pulled the gear
door attachment point off the gear leg once on a VERY hard landing at a
fishing camp in North Arkansas on a turf strip.  I repaired it with
epoxy two years ago.

Rene'

-----Original Message-----
From: reflector-bounces at tvbf.org [mailto:reflector-bounces at tvbf.org] On
Behalf Of Scott Derrick
Sent: Wednesday, February 07, 2007 9:18 AM
To: Velocity List
Subject: REFLECTOR: main gear brake lines

I'm starting the process of beefing up my main gear legs with carbon 
fiber wraps and wanted to ditch the externsl stainless covered rubber 
brake lines in favor of embedded nylo-flow lines as per the manual.

Questions:

I have 3/16 nyla-flow running to the firewall from the master 
cylinders.  Would it be bad to run 1/8 line down the legs.  I can't 
imagine that would restrict the flow during application all that much. 

Also I would like to do the soda straw technique or some other way of 
building a tube in the leg for the nyla-flow to be inserted into so it 
could be changed out easily if needed.  Any great ideas on how to do 
this with ease?

Scott

-- 

-
    The antidote for misuse of freedom of speech is more freedom of
speech.

    Molly Ivans 

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