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To: lml
Date: Wed, 14 Feb 2007 11:08:14 -0500
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From: "George Shattuck" <kloop@plantationcable.net>
References: <list-1837248@logan.com>
Subject: Re: [LML] Re: DH Lines- LNC-2's retrofit
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I had a Nyla-Flo brake line failure in December, 2004 after ten years of 
operation and about 1100 hours.

It was a cold morning and I was ready to crank up, and in checking the 
breaks prior to engine start up, the right brake just faded away to nothing. 
The brake line had parted, under that brake pressure, in the wheelwell where 
it traveled between ribs on its way to the cockpit closeout rib.  I ordered 
new Nyla-Flo brake line and replaced both sides on the same route as I 
originally installed them.  If they last another ten years it will be longer 
than I can last.

George Shattuck
N320GS
----- Original Message ----- 
From: "Marvin Kaye" <marv@lancaironline.net>
To: <lml@lancaironline.net>
Sent: Wednesday, February 14, 2007 9:13 AM
Subject: [LML] Re: DH Lines- LNC-2's retrofit


> Posted for "cblitzer" <cblitzer@triad.rr.com>:
>
>  Two stupid questions this time:
>  1 -is Nylock the same stuff as Nyla-Flow?
>  2 - so much time and effort on the brake lines, I don't remember anyone 
> ever
> asking if there has there ever been a know or reported failure of 
> Nyla-Flow
> that Lancair sells with the kits ?
>  Craig Blitzer
>
>>   Just a thought or two, after talking with DH Engineer, Mike Montgomery, 
>> their connection nuts are 9/16" across the flat and right at 5/8" across 
>> the corners.  It takes a 5/8" hole to get the nut thru.  The 
>> Nylon/Kevlar/Nylon line itself is 4.9 mm O.D.-- 2.0 mm I.D.  It is 
>> crimped hydraulically and swedged at its tip onto the mandrel.  No way to 
>> do this in the field.  DH will do a Swedgelok (sp?) end, will not test it 
>> and its still a bit more that 1/4" on the upset.  SOOO for a bunch us 
>> with the Nylok tuning ( and shiethed in 0.132" O.D. Tygon or other)  it's 
>> time to consider something else.. The guys at Lancair still recommend the 
>> Nylok and mine has been well shiethed and in service for 19 years.  So, 
>> group what else is there ???   AOG    Don Skeele    N320J
>
> [I could be wrong, but I think Don simply interchanged two trade or brand 
> names when he posted his message....   Generally, "Nylock" is the term 
> (likely a brand name, you know, like "Kleenex" for tissue) used to 
> identify a general purpose self-locking nut, the kind that employs a nylon 
> insert to engage the threads and keep the nut from vibrating off on its 
> own.  "NylaFlow", OTOH, is another brand name for the plastic tubing that 
> is receiving so much attention. I don't even know if the stuff actually 
> has a nylon component, I always thought it was made from one of those 
> polyethylene or polypropylene compounds, but I'm not a chemist, so that is 
> conjecture on my part.
>
> As for tubing failures... there have been a number of them reported over 
> the years, some resulting in substantial damage due to uncontrollable 
> runway excursions.  They are, I am sure, partly responsible for Brent 
> Regan's steadfast and vocal position against the use of "aquarium tubing" 
> for something as important as a brake line.  I am pretty sure there are 
> even present LML members with first-hand experiences.
>
>    <marv>  ]
>
> --
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