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Do the plastic brake lines leak?
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bcondrey

Joined: 03 Apr 2006
Posts: 580

Posted: Thu Mar 15, 2007 11:18 am Post subject: Do the plastic brake lines leak?

To reinforce Tim's comments - I used to follow the Lancair mail lists

daily (before I got some learnin') and the issue of plastic brake lines

is a frequently discussed item there.  Apparently they run the plastic

lines all the way to the calipers and there have been at least a couple

of fires as a result of brakes heating up.  Since it may be sometime in

2019 before John actually gets to that point in his kit, it's possible

that he didn't know that the RVs have aluminum lines except for the

reservoir plumbing.  Of course, he knows now...



Bob #40105



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LloydDR(at)wernerco.com
Guest

Posted: Thu Mar 15, 2007 11:49 am Post subject: Do the plastic brake lines leak?

And I could see this being a problem down low on the gear leg,

especially since they stall about 15% higher speed than a 10 and have to

dissipate that much more energy as heat.

Dan

N289DT 



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VHMUM(at)bigpond.com
Guest

Posted: Thu Mar 15, 2007 1:34 pm Post subject: Do the plastic brake lines leak?

RV6 VH-MUM 500++ hours plastic lines and loving them. No need to waist money 

here. Just install like the plans say.



chris



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rvbuilder(at)sausen.net
Guest

Posted: Thu Mar 15, 2007 1:37 pm Post subject: Do the plastic brake lines leak?

Ah, but if you do not view the problem directly it is both there and not there at the same time.



  Sorry, couldn't help it.    As Dan says, if it ain't broke, don't fix it.  Anyone actually look at what the burst pressure is of that line and what the maximum pressure of the cylinders are?



Michael

Do not archive



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speckter(at)comcast.net
Guest

Posted: Thu Mar 15, 2007 3:39 pm Post subject: Do the plastic brake lines leak?

One of the largest problems in the homebuilding circles IMHO is that of

solving problems that do not exist.  Having built a few myself and being a

Technical counselor I see it over and over.  Much time and energy spent on

thing that are not an issue.  Wait until there are reports of a problem

before you spend the time and $$ to fix it.



Just my $.02

Gary

40274



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jesse(at)saintaviation.co
Guest

Posted: Thu Mar 15, 2007 4:09 pm Post subject: Do the plastic brake lines leak?

I agree completely.  A perfect example is the axle extender buy that Tim

orchestrated.



Do not archive



Jesse Saint

Saint Aviation, Inc.

jesse(at)saintaviation.com

www.saintaviation.com

Cell: 352-427-0285

Fax: 815-377-3694



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wcurtis(at)nerv10.com
Guest

Posted: Thu Mar 15, 2007 5:35 pm Post subject: Do the plastic brake lines leak?

Amen!Or fixes that make things worse than the perceived problem they are trying to avoid.  The AFP fuel servo with purge valve that is suppose to make hot starts easier comes to mind.  People install them and then do not safety wire the set screws on the stops which leads to engine failure.Do not archive.Williamhttp://wcurtis.nerv10.com/  --> RV10-List message posted by: "gary" One of the largest problems in the homebuilding circles IMHO is that ofsolving problems that do not exist. Having built a few myself and being aTechnical counselor I see it over and over. Much time and energy spent onthing that are not an issue. Wait until there are reports of a problembefore you spend the time and $$ to fix it.Just my $.02Gary40274--

CJohnston(at)popsound.com
Guest

Posted: Thu Mar 15, 2007 5:53 pm Post subject: Do the plastic brake lines leak?

hi guys - 



I believe I started all this plastic brake line business by asking the simple question: do any of you out there have experience with these lines leaking.  apparently the answer has been mostly "nope".  That's good to hear.  From many, the answer is "nope, but they might someday".  Then there's the "nope, and why fix something that isn't broken".  I thought since I began this discussion, I might sum up the responses a bit, and point out that the constant in all the answers is that "nope.  they don't leak".  And just to be clear, it's only lines under the forward fuse deck, not lines going down to the wheels (which apparently catch fire).  



I was mostly asking about leaks because it kind of seems like passengers could kick and kind of beat up the lines, and create a problem.  Also if it gets warm down there next to the firewall, I thought the compression fittings might do something weird.  I don't really have any experience with this type of fitting, but I have a ton of experience with braided steel and AN type fittings. Hence the question.   I haven't decided if I'll have some lines made, or if I'll just build em like it says in the plans, but it's nice to know they work as designed.  I'd just be bummed not to have brakes in a non-steerable nosewheel plane.  i think...  it's not like i've ever flown one before...



thanks for all the input guys!

cj

#40410

wings/fuse/finishing

do not archive

speckter(at)comcast.net
Guest

Posted: Fri Mar 16, 2007 6:05 am Post subject: Do the plastic brake lines leak?

You can find a boogy man behind every fitting and every rivet if you want

to.  Relax and have fun building.  It is a well designed plane.  There was

an excellent article in one of the last AOPA Pilot magazines by Rod Machado

about this very subject.

Gary

40274



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Dick Sipp

Joined: 11 Jan 2006
Posts: 215
Location: Hope, MI

Posted: Sat Mar 17, 2007 6:38 am Post subject: Do the plastic brake lines leak?

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