REFLECTOR: brake lines

Tue Mar 7 22:10:25 CST 2006

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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