REFLECTOR: brake lines

Ron Brown romott at adelphia.net
Tue Mar 7 17:20:04 CST 2006


For the brake fluid lines, just run them through the duct to a point behind 
the seats.  I actually ran mine through the keel but I have an RG and this 
made more sense.  I had a concern about running my nylaflow inside the ducts 
with the hot oil lines, so I didn't use the duct for either the rudder or 
brake lines.

Actually, the rudder cables run through nylaflow as well.  I ran mine above 
the ducts on either side.  By the way, when you install these, be sure to 
roughen the nylaflow where it goes through the firewall and use some 
flox-epoxy to fix the ends so they don't move.  Else you will lose some of 
your rudder travel.

Ronnie


----- Original Message ----- 
From: "Grigore Rosu" <grosu at cs.uiuc.edu>
To: "'Velocity Aircraft Owners and Builders list'" <reflector at tvbf.org>
Sent: Tuesday, March 07, 2006 5:24 PM
Subject: REFLECTOR: brake lines


>I just finished installing the master cylinders in my SEFG and now I'd like
> to install the nylaflow brake lines.  The manual says that I should drive
> them through the pilot airduct, all the way down till right before the
> firewall, then have each brake line go to its corresponding leg.  I
> understand the big picture, but there are all those details left that are
> not mentioned in the manual, so I'd like to kindly ask those of you who 
> are
> more advanced with their projects for a few more details, even some
> pictures, if possible.
>
> First of all, I found the following picture on Velocity's website:
> http://www.velocityaircraft.com/photos/Fuselage/pages/MG-CABLE-AND-BRAKELINE
> 0088.html
> In this picture, the brake lines seem to leave the airduct way before the
> firewall and are driven through some sort of a tube to the middle of the
> firewall.  This is different from what they said in the manual ...
>
> If I follow the manual, should I simply drill a larger hole in the airduct
> right before the firewall?  Where exactly, in the upper or in the lower 
> part
> of the airduct?  It should not matter for the co-pilot leg, but it seems
> important for the pilot leg; I guess we do not want to bend the brake line
> too much ...
>
> To me, the most natural thing to do seems to drill TWO holes, one for the
> brake line of each leg.  The one for the co-pilot leg would be as low as
> possible, so that the brake line smoothly goes on the bottom of the 
> airplane
> right in front of the firewall to the co-pilot leg.  The other hole, on 
> the
> pilot's side, I would drill through the bottom of the fuselage as close as
> possible to the leg, so that the pilot brake line smoothly goes down the 
> leg
> to the wheel.  What I'm missing here, I guess, is what happens next with
> these nylaflow tubes; how should they transit from the fuselage to the 
> legs
> so that they do not get damaged during landings?
>
> So, what did you do with the brake lines in your airplanes?  Do you have 
> any
> pictures available?  I looked at Andy Millin's pictures, but he seems to
> have an entirely different setting for his brake lines: they are of 
> aluminum
> instead of nylaflow, and they go through the keel instead of through the
> airduct.
>
> Thank you in advance,
> Grigore
>
>
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