REFLECTOR: brake lines

[Ron Brown]

No, I used larger diameter nylon tube that the nyloflow would fit in.  I 
stopped that about 8" above the caliper.  Then I installed an 8" length of 
3/16(? - it is the same size as the nyloflow) aluminum tubing.  I used the 
same brass fittings supplied for the nyloflow.  NAPA had the additional 
union fittings and ferrules that I needed.

Ronnie

----- Original Message ----- 
From: "Scott Derrick" <scott at tnstaafl.net>
To: "Velocity Aircraft Owners and Builders list" <reflector at tvbf.org>
Sent: Tuesday, March 07, 2006 11:10 PM
Subject: Re: REFLECTOR: brake lines


> Ron,
>
> did you glass your lines into the legs?
>
> Scott
>
> Ron Brown wrote:
>> No, not a safety issue to run the nyloflow in the duct with the oil 
>> lines. I ran mine down the keel because on my RG that is where the lines 
>> needed to end up at the back where they connect to the pivoting main gear 
>> legs.  The picture you're referring to is actually an RG too.  The lines 
>> run through a piece of larger nylon tubing from the left side duct to the 
>> center of the gear bulkhead.
>>
>> However, I did run about 8" of aluminum line at the bottom of the gear 
>> legs to minimize the chance of overheating the nyloflow from the heat of 
>> the calipers.  This IS a safety issue.  I personally know of two planes 
>> (not Velocities) that lost brakes on initial taxi testing due to nyloflow 
>> overheating and blowing out. RV's have had the same problem.
>>
>> 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 6:51 PM
>> Subject: RE: REFLECTOR: brake lines
>>
>>
>>> Kevin,
>>>
>>> Yes, I am sure.  I initially had a similar concern, so I sent a message 
>>> to
>>> the factory.  Scott Swing answered and said that both the brake lines 
>>> and
>>> the rudder cable use the same nylaflow; the kit came with 55 feet of
>>> nylaflow, I guess enough for both the rudder and the brake lines.
>>>
>>> Ron and others, is there a real safety issue with running the nylaflow 
>>> brake
>>> lines with hot oil through the airducts?  I'm a beginner in building and 
>>> I'd
>>> prefer to just follow the manual confidently, without having to worry 
>>> about
>>> things being unsafe ...
>>>
>>> Yes Michalk (sorry, I do not know your first name), I'm slowly learning 
>>> how
>>> to read between the lines.  But still, I'd prefer not to deviate from 
>>> the
>>> manual, because I want to fly it soon.
>>>
>>> Thanks,
>>> Grigore
>>>
>>>
>>> -----Original Message-----
>>> From: reflector-bounces at tvbf.org [mailto:reflector-bounces at tvbf.org] On
>>> Behalf Of Velocity_AZ
>>> Sent: Tuesday, March 07, 2006 4:37 PM
>>> To: 'Velocity Aircraft Owners and Builders list'
>>> Subject: RE: REFLECTOR: brake lines
>>>
>>> Are you sure you are not seeing the nylaflow tubing that houses the 
>>> rudder
>>> cable?
>>>
>>> Kevin
>>>
>>> -----Original Message-----
>>> From: reflector-bounces at tvbf.org [mailto:reflector-bounces at tvbf.org] On
>>> Behalf Of Grigore Rosu
>>> Sent: Tuesday, March 07, 2006 3:25 PM
>>> To: 'Velocity Aircraft Owners and Builders list'
>>> 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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>>
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>>
>>
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