Today's Message Index:
----------------------
1. 07:09 AM - Re: Question On Low-Pressure Brake Lines... (Christopher Stone)
2. 07:56 AM - Re: Question On Low-Pressure Brake Lines... (manuel weber)
3. 10:03 AM - Re: Question On Low-Pressure Brake Lines... (James Baldwin)
4. 01:46 PM - Re: Question On Low-Pressure Brake Lines... (david wilder)
5. 04:32 PM - Re: Question On Low-Pressure Brake Lines... (William Slaughter)
Message 1
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| Subject: | Re: Question On Low-Pressure Brake Lines... |
Matt...
RV's have been using the nylon brake supply tube for years with few problems.
The issue that may give you a problems is when bleeding... Being able to see
the bubbles in the supply lines make it possible to purge them. I admit that
I have a sample size of one... but, we had a tough time getting all the bubbles
out even when we could see them.
Chris Stone
RV-8
Newberg, Oregon
-----Original Message-----
>From: Matt Dralle <dralle@matronics.com>
>Sent: Oct 28, 2008 9:48 PM
>To: rv8-list@matronics.com, rv-list@matronics.com
>Subject: RV8-List: Question On Low-Pressure Brake Lines...
>
>
>Dear Listers,
>
>I spent a lot of time staring at those plastic brake lines for the low pressure
side and just didn't like a thing about them. Just imagine if one were to break
and what a mess all the brake fluid all over the cockpit would be like.
>
>After some thought, I came up with the following system for the low pressure feed.
I used standard AN 1/4" fittings and aluminum tubing to bring the fluid
from the reservoir to a tee fitting and then to bulkhead fittings that connect
to standard Aeroquip hoses to the master calendars. Yeah, it was a little more
weight, but the peace of mind is worth it.
>
>But here's my question. Notice that on the back side of the second bulkhead,
I kind of looped the tubing up and around the hole for the vent. This also positioned
tee fitting nicely to feed the left and right sides. The top of that
loop is maybe 4 to 5" higher than the top of the reservoir, though. Is the flow
from the reservoir to the master cylinders suppose to be basically "gravity
fed" or is the "pump" action from the master cylinders all that is necessary
to keep the tube and master cylinders full?
>
>Matt Dralle
>RV-8 #82880 N844RV (res)
Message 2
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| Subject: | Re: Question On Low-Pressure Brake Lines... |
The important thing is to have the reservoir higher than any of the feed li
nes.- Having all the bubbles out of the feed lines is not necessary as lo
ng as you have enough head for a positive fluid flow to the master cylinder
s.- You may have a-problem with an air lock in some of the loops you cr
eated in the feed lines.- -Pressure bleeding the system from the bottom
up should purge enough of the feed lines to have a sufficient solid reserv
oir of fluid for feeding the master cylinders when they need additional flu
id.=0A=0ARemember that the only time the master cylinders need any addition
al fluid is to compensate for brake wear.=0A=0A=0A=0A=0A___________________
_____________=0AFrom: Matt Dralle <dralle@matronics.com>=0ATo: rv8-list@mat
ronics.com; rv-list@matronics.com=0ASent: Tuesday, October 28, 2008 8:48:08
PM=0ASubject: RV8-List: Question On Low-Pressure Brake Lines...=0A=0A=0ADe
ar Listers,=0A=0AI spent a lot of time staring at those plastic brake lines
for the low pressure side and just didn't like a thing about them.- Just
imagine if one were to break and what a mess all the brake fluid all over
the cockpit would be like.=0A=0AAfter some thought, I came up with the foll
owing system for the low pressure feed.- I used standard AN 1/4" fittings
and aluminum tubing to bring the fluid from the reservoir to a tee fitting
and then to bulkhead fittings that connect to standard Aeroquip hoses to t
he master calendars.- Yeah, it was a little more weight, but the peace of
mind is worth it.=0A=0ABut here's my question.- Notice that on the back
side of the second bulkhead, I kind of looped the tubing up and around the
hole for the vent.- This also positioned tee fitting nicely to feed the l
eft and right sides.- The top of that loop is maybe 4 to 5" higher than t
he top of the reservoir, though.- Is the flow from the reservoir to the m
aster cylinders suppose to be basically "gravity fed" or is the "pump" acti
on from the master cylinders all that is necessary to keep the tube and mas
ter cylinders full?=0A=0AMatt Dralle=0ARV-8 #82880 N844RV (res)=0A=0A=0A
Message 3
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| Subject: | Question On Low-Pressure Brake Lines... |
Matt-
Surely you are using one of the "reverse flow", one man brake bleeding
external reservoirs? With it, the external source of brake fluid is forced
back through the calipers, up the pressurized supply lines, through the
master cylinders, up the un-pressurized feed lines and into the reservoir,
spilling out the top into a temporary catch can. There is no possible
bubble in any line. Works great, available at ACS. JBB
-----Original Message-----
From: owner-rv8-list-server@matronics.com
[mailto:owner-rv8-list-server@matronics.com] On Behalf Of Matt Dralle
Sent: Tuesday, October 28, 2008 6:48 PM
Subject: RV8-List: Question On Low-Pressure Brake Lines...
Dear Listers,
I spent a lot of time staring at those plastic brake lines for the low
pressure side and just didn't like a thing about them. Just imagine if one
were to break and what a mess all the brake fluid all over the cockpit would
be like.
After some thought, I came up with the following system for the low pressure
feed. I used standard AN 1/4" fittings and aluminum tubing to bring the
fluid from the reservoir to a tee fitting and then to bulkhead fittings that
connect to standard Aeroquip hoses to the master calendars. Yeah, it was a
little more weight, but the peace of mind is worth it.
But here's my question. Notice that on the back side of the second
bulkhead, I kind of looped the tubing up and around the hole for the vent.
This also positioned tee fitting nicely to feed the left and right sides.
The top of that loop is maybe 4 to 5" higher than the top of the reservoir,
though. Is the flow from the reservoir to the master cylinders suppose to
be basically "gravity fed" or is the "pump" action from the master cylinders
all that is necessary to keep the tube and master cylinders full?
Matt Dralle
RV-8 #82880 N844RV (res)
Message 4
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| Subject: | Re: Question On Low-Pressure Brake Lines... |
Could you please delete me from the RV list?
I am going in a different direction.
David Wilder
----- Original Message -----
From: "Matt Dralle" <dralle@matronics.com>
Sent: Tue, October 28, 2008 21:48
Subject:RV8-List: Question On Low-Pressure Brake Lines...
Dear Listers,
I spent a lot of time staring at those plastic brake lines for the low
pressure side
and just didn't like a thing about them. Just imagine if one were to
break and what
a mess all the brake fluid all over the cockpit would be like.
After some thought, I came up with the following system for the low
pressure feed.
I used standard AN 1/4" fittings and aluminum tubing to bring the fluid
from the
reservoir to a tee fitting and then to bulkhead fittings that connect to
standard
Aeroquip hoses to the master calendars. Yeah, it was a little more
weight, but the
peace of mind is worth it.
But here's my question. Notice that on the back side of the second
bulkhead, I kind
of looped the tubing up and around the hole for the vent. This also
positioned tee
fitting nicely to feed the left and right sides. The top of that loop is
maybe 4 to
5" higher than the top of the reservoir, though. Is the flow from the
reservoir to
the master cylinders suppose to be basically "gravity fed" or is the
"pump" action
from the master cylinders all that is necessary to keep the tube and master
cylinders full?
Matt Dralle
RV-8 #82880 N844RV (res)
----- End of original message -----
Message 5
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| Subject: | Question On Low-Pressure Brake Lines... |
David, you have to do that yourself. Look at the instructions at the bottom of
the post.
-----Original Message-----
From: owner-rv8-list-server@matronics.com [mailto:owner-rv8-list-server@matronics.com] On Behalf Of david wilder
Sent: Wednesday, October 29, 2008 3:44 PM
Subject: Re: RV8-List: Question On Low-Pressure Brake Lines...
Could you please delete me from the RV list?
I am going in a different direction.
David Wilder
----- Original Message -----
From: "Matt Dralle" <dralle@matronics.com>
Sent: Tue, October 28, 2008 21:48
Subject:RV8-List: Question On Low-Pressure Brake Lines...
Dear Listers,
I spent a lot of time staring at those plastic brake lines for the low
pressure side
and just didn't like a thing about them. Just imagine if one were to
break and what
a mess all the brake fluid all over the cockpit would be like.
After some thought, I came up with the following system for the low
pressure feed.
I used standard AN 1/4" fittings and aluminum tubing to bring the fluid
from the
reservoir to a tee fitting and then to bulkhead fittings that connect to
standard
Aeroquip hoses to the master calendars. Yeah, it was a little more
weight, but the
peace of mind is worth it.
But here's my question. Notice that on the back side of the second
bulkhead, I kind
of looped the tubing up and around the hole for the vent. This also
positioned tee
fitting nicely to feed the left and right sides. The top of that loop is
maybe 4 to
5" higher than the top of the reservoir, though. Is the flow from the
reservoir to
the master cylinders suppose to be basically "gravity fed" or is the
"pump" action
from the master cylinders all that is necessary to keep the tube and master
cylinders full?
Matt Dralle
RV-8 #82880 N844RV (res)
----- End of original message -----
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