VansAirForceForums  
Home > VansAirForceForums

-POSTING RULES
-Advertise in here!
- Today's Posts | Insert Pics

Keep VAF Going
Donate methods

Point your
camera app here
to donate fast.


Go Back   VAF Forums > Model Specific > RV-4
Register FAQ Members List Calendar Search Today's Posts Mark Forums Read

Reply
 
Thread Tools Search this Thread Display Modes
  #1  
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?
Reply With Quote
  #2  
Old 08-20-2020, 10:01 AM
N184DA's Avatar
N184DA N184DA is offline
 
Join Date: Jun 2007
Location: Tacoma, WA
Posts: 137
Default

Quote:
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
dlaubuchon@gmail.com

(2020/2021 dues paid)
Reply With Quote
  #3  
Old 08-20-2020, 10:30 AM
snopercod's Avatar
snopercod snopercod is offline
 
Join Date: Aug 2016
Location: Asheville, NC
Posts: 2,122
Default

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.
__________________
(2020 dues paid)
Reply With Quote
  #4  
Old 08-20-2020, 11:30 AM
AlpineYoda AlpineYoda is offline
 
Join Date: Nov 2019
Location: Boulder, CO
Posts: 263
Default

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 -- https://eaabuilderslog.org/?blproject&proj=7ZSwfzr2g
Started 12/19/2019
Engine hung 1/9/2021
Panel in 2Q 2021
Flying fall 2021?

N1814T reserved with FAA
Donated Jan 11 for 2021, EAA and AOPA member
Reply With Quote
  #5  
Old 08-20-2020, 11:59 AM
Mel's Avatar
Mel Mel is offline
 
Join Date: Mar 2005
Location: Dallas area
Posts: 10,969
Default

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)
<rvmel(at)icloud.com>

Last edited by Mel : 08-21-2020 at 02:56 PM.
Reply With Quote
  #6  
Old 08-20-2020, 01:15 PM
RV-4 RV-4 is offline
 
Join Date: Oct 2007
Location: St-Jerome,Quebec,Canada
Posts: 1,162
Default Plastic Brake Lines

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

Bruno
Reply With Quote
  #7  
Old 08-20-2020, 09:56 PM
riobison riobison is offline
 
Join Date: Jul 2011
Location: Oliver BC & Red Deer Alberta Canada
Posts: 378
Default

Just after I bought my RV 4 I blew a hole in the plastic line just above where it joined on the gear leg.

First thing I did on the pressure side is replaced the all the plastic lines with Teflon lines.

If it had happened during roll out, it could have been a lot worse.

Lots of stuff on the forums on those lines failing.

Tim
Reply With Quote
  #8  
Old 08-21-2020, 05:09 AM
fixnflyguy fixnflyguy is offline
 
Join Date: Jan 2006
Location: Winston-Salem, N.C.
Posts: 1,352
Default My advice

As many have said, they are standard kit supplied lines, and also used by many other experimentals . I put them in my -4 when I built it, and they performed great for several years..then the leaking began at the calipers.Often after hard braking, climate/temperature swings or long taxis, the leaks would return even after trimming and reseating the lines. The final straw was near complete failure of my left brake on way home from OSH last year taxiing out, and making making the trip home using only right brake less than pleasurable. I replaced all mine with SS braided and never looked back. Do it from the start and be done with it. This is a place money is well spent. A very good, highly recommended source is an advertiser here..Call Tom at TS Flightlines.
__________________
Bill E.
RV-4/N76WE
8A7 / Advance NC
Reply With Quote
  #9  
Old 08-21-2020, 09:49 AM
AlpineYoda AlpineYoda is offline
 
Join Date: Nov 2019
Location: Boulder, CO
Posts: 263
Default

Quote:
Originally Posted by fixnflyguy View Post
As many have said, they are standard kit supplied lines, and also used by many other experimentals . I put them in my -4 when I built it, and they performed great for several years..then the leaking began at the calipers.Often after hard braking, climate/temperature swings or long taxis, the leaks would return even after trimming and reseating the lines. The final straw was near complete failure of my left brake on way home from OSH last year taxiing out, and making making the trip home using only right brake less than pleasurable. I replaced all mine with SS braided and never looked back. Do it from the start and be done with it. This is a place money is well spent. A very good, highly recommended source is an advertiser here..Call Tom at TS Flightlines.
As I said above, I used Tom, too. And I completely vouch for him. Super responsive, very very helpful. They can do the whole kit, or individual pieces. It you want to keep the fixed lines plastic or aluminum, they can sell you just the moving lines (the lines near the pedals), or any combo you want. I got mine about 10 days after I ordered them, complete with all the fittings.
__________________
RV-10 build blog -- https://eaabuilderslog.org/?blproject&proj=7ZSwfzr2g
Started 12/19/2019
Engine hung 1/9/2021
Panel in 2Q 2021
Flying fall 2021?

N1814T reserved with FAA
Donated Jan 11 for 2021, EAA and AOPA member
Reply With Quote
  #10  
Old 08-21-2020, 09:50 AM
flyinga flyinga is offline
 
Join Date: Dec 2007
Location: Fredericksburg, TX
Posts: 667
Default

I agree with Bill. I would not trust my brakes to plastic lines. I'm surprised they are standard in many of the RV kits....
__________________
Jim Averett
RV-8
TS36 - Silver Wings
Fredericksburg, TX
Reply With Quote
Reply


Thread Tools Search this Thread
Search this Thread:

Advanced Search
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

vB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Forum Jump


All times are GMT -6. The time now is 01:00 PM.


The VAFForums come to you courtesy Delta Romeo, LLC. By viewing and participating in them you agree to build your plane using standardized methods and practices and to fly it safely and in accordance with the laws governing the country you are located in.