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Old 08-20-2020, 09:54 AM
Sully73 Sully73 is offline
Join Date: Jul 2020
Location: Lincoln, NE
Posts: 23
Default Plastic Brake Lines?

I saw an RV-4 with plastic brake lines. Is this common/safe/wise?
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Old 08-20-2020, 10:01 AM
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N184DA N184DA is offline
Join Date: Jun 2007
Location: Tacoma, WA
Posts: 137

Originally Posted by Sully73 View Post
I saw an RV-4 with plastic brake lines. Is this common/safe/wise?
That was the original spec, per plans.
Derrick L. Aubuchon
RV4 (Flying, approx 900hrs)
Tacoma Narrows Airport (TIW), WA

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Old 08-20-2020, 10:30 AM
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snopercod snopercod is offline
Join Date: Aug 2016
Location: Asheville, NC
Posts: 2,122

Nylon brake lines are widely used in the experimental community. I chose not to run Nylon all the way to the brakes out of concern for heat. For the last 18", I transitioned to Russell motorcycle (Teflon/SS) flex hoses.
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Old 08-20-2020, 11:30 AM
AlpineYoda AlpineYoda is offline
Join Date: Nov 2019
Location: Boulder, CO
Posts: 263

There are alternatives, but they are pricey. I bought a full set of braided SS and Teflon brake and fuel lines from TS Flightlines / Aircraft Specialty. They are absolutely beautiful and fit perfectly. Something about those standard nylon lines didnít sit right with me and I wanted something that was more durable, had better connections, and looked great. There wasnít much documentation with the lines, but I was able to figure out where all the various hoses went in an afternoon.
RV-10 build blog --
Started 12/19/2019
Engine hung 1/9/2021
Panel in 2Q 2021
Flying fall 2021?

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Donated Jan 11 for 2021, EAA and AOPA member
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Old 08-20-2020, 11:59 AM
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Mel Mel is offline
Join Date: Mar 2005
Location: Dallas area
Posts: 10,969

Nylaflo brake lines work just fine. RVs have been using them for decades.

I do NOT recommend using them all the way to the caliper, especially on the "A" models. The brakes on "A" models sometimes get pretty hot because many people over-use them for steering. A little prop blast on the rudder will usually turn the airplane just fine. I typically use solid lines down the gear leg to the caliper.

As always YMMV.
Mel Asberry, DAR since the last century. Over 1,000 certifications accomplished.
EAA Flight Advisor/Tech Counselor, Friend of the RV-1
Recipient of Tony Bingelis Award and Wright Brothers Master Pilot Award
USAF Vet, High School E-LSA Project Mentor.
RV-6 Flying since 1993 (sold)

Last edited by Mel : 08-21-2020 at 02:56 PM.
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Old 08-20-2020, 01:15 PM
RV-4 RV-4 is offline
Join Date: Oct 2007
Location: St-Jerome,Quebec,Canada
Posts: 1,163
Default Plastic Brake Lines

I'm in the process of replacing them on my -4...just took me 20 years to do it..

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