Larry Bowen
Joined: 09 Jan 2006
Posts: 802
Location: NC, USA
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 Posted: Sun Sep 01, 2013 9:47 am Post subject: 3/16 vs 1/4 Brake Lines...thread drift to brake fluid |
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I've also heard this, and plan to use Mobile 1 Synthetic ATF in my RV-7 project. On Sep 1, 2013 1:28 PM, "Charlie England" <ceengland7(at)gmail.com (ceengland7(at)gmail.com)> wrote:[quote] Best reason I've found for not using mil spec fluid is *synthetic* automatic transmission fluid; available everywhere, high temp, & compatible with original seals. The internet tubes tell me that Matco even recommends it.
FWIW,
Charlie
On 09/01/2013 12:12 PM, Dave Saylor wrote:
| Quote: | We've installed 3/16" lines on several Lancairs since some need a particularly small OD to fit past part of the landing gear. �They work very nicely and don't seem any different than 1/4" lines.
I second the opinion about using�MIL-PRF-83282. �There's not really any reason not to.
Dave Saylor
[url=tel:831-750-0284]831-750-0284[/url] CL
On Sat, Aug 31, 2013 at 8:51 PM, Ed <decaclops(at)gmail.com (decaclops(at)gmail.com)> wrote:
| Quote: | --> RV-List message posted by: Ed <decaclops(at)gmail.com (decaclops(at)gmail.com)>
Nothing wrong with 3/16" lines operationally. They make for a harder pedal feel. We're not moving very much fluid to where the difference in size would be a detriment. Really, when you think about it, brakes are for run up anyway. I use the MIL-PRF-83282 synthetic brake fluid. Van's sells it as Royco 782. It has a higher flashpoint than 5606, but is completely compatible. That means you can find something that will work when you need some fluid away from home.
Ed Holyoke
On 8/31/2013 7:33 PM, Dan Bergeron wrote:
| Quote: | Dennis
Re use of 3/16" brake line instead of Vans' 1/4" - I'm not an engineer
but the folks who design airplanes at Vans �Aircraft are - they use 1/4"
brake lines for a reason - my advice would be don't do it - there is a
serious safety issue here - braking action would almost certainly be
dangerously impacted - want to save a few ounces - Matt offered some
great advice - go on a diet -
Dan Bergeron
RV-7A - N307TB
425 hours since first
� � � flight on 8/6/09
On Sat, Aug 31, 2013 at 9:34 PM, Matt Dralle <dralle(at)matronics.com (dralle(at)matronics.com)
<mailto:dralle(at)matronics.com (dralle(at)matronics.com)>> wrote:
� � --> RV-List message posted by: Matt Dralle <dralle(at)matronics.com (dralle(at)matronics.com)
� � <mailto:dralle(at)matronics.com (dralle(at)matronics.com)>>
� � At 06:22 PM 8/31/2013 Saturday, you wrote:
� � �>--> RV8-List message posted by: Dennis Fox <dennisfox(at)persona.ca (dennisfox(at)persona.ca)
� � <mailto:dennisfox(at)persona.ca (dennisfox(at)persona.ca)>>
� � �>
� � �>My RV8a project is ready for wheels, and I keep thinking about the
� � brake system and lines. �Seem to me like some weight could be saved
� � by going with 3/16 brake lines, (smaller line and less fluid).
� � � Problem with small lines is the heavy �viscosity of A/C hydraulic
� � oil, especially when cold. Solution would be automotive Dot 3 or
� � � Dot 4, but are there compatability issues with the �Matco master
� � cylinders and Cleveland calipers? �Maybe new o-rings could solve the
� � problem? �Anyone know the answer?
� � Hi Dennis,
� � Hum, you should actually put the parts and fluid between a 1/4" and
� � a 3/16" system on a scale and weigh them. �I think that you're going
� � to find the difference in weight is almost negligible. �Oh the other
� � hand, the difference in braking capabilities could be deadly.
� � � Personally, I could stand to lose 50 lbs around my belly. �That is
� � some realy weight savings that would make my RV fly a lot better. �
� � I've done a fair amount of custom stuff on my RV, but when it comes
� � to engineered stuff like the size of the brake lines, and other
� � dimensional stuff, Van's is the man. �Van's hates fat airplanes. �If
� � he felt that 3/16" brake lines would be adequate, I know for certain
� � that he would have used them.
� � Matt's $.02.
� � -
� � Matt Dralle
� � RV-8 #82880 N998RV "Ruby Vixen"
� � http://www.mattsrv8.com - Matt's Complete RV-8 Construction Log
� � http://www.mattsrv8.com/Mishap - Landing Mishap Rebuild Log
� � http://www.youtube.com/MattsRV8 - Matt's RV-8 HDTV YouTube Channel
� � Status: 172+ Hours TTSN - Rebuilding Fuselage After Landing Mishap...
� � RV-6 #20916 N360EM "The Flyer"
� � http://www.mattsrv6.com - Matt's RV-6 Revitalization Log
� � Status: 180+ Hours Since Purchase - Upgrades Complete; Now In Full
� � Flyer Mode
� � Matt's Livermore Airport Live ATC Stream!
� � Check out the live ATC stream directly from my hangar at the Livermore
� � Airport. �Includes both Tower and Ground transmissions. �Archives too!
� � For entertainment purposes only. http://klvk.matronics.com
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_________________
Larry Bowen
RV-8 SOLD,
RV-7QB in progress... |
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