Braking in new breaks

[karl gruber[_1_]]

I just installed new break pads and am wondering if there is a procedure to
brake them in?

Best,
Karl:)

[Paul Tomblin]

In a previous article, "karl gruber" > said:
>I just installed new break pads and am wondering if there is a procedure to
>brake them in?

You've heard of a V1 cut? :-)


--
Paul Tomblin > http://blog.xcski.com/
You can lead an idiot to knowledge but you cannot make him think. You can,
however, rectally insert the information, printed on stone tablets, using a
sharpened poker. -- Nicolai

[karl gruber[_1_]]

"Paul Tomblin" > wrote in message
...
> In a previous article, "karl gruber" > said:
>>I just installed new break pads and am wondering if there is a procedure
>>to
>>brake them in?
>
> You've heard of a V1 cut? :-)
They sure are fun in the sim!

KG

[Orval Fairbairn]

In article >,
"karl gruber" > wrote:

> I just installed new break pads and am wondering if there is a procedure to
> brake them in?
>
> Best,
> Karl:)

Just petal the rudder peddles. You might find that somebody pedaled you
the wrong set! ;>)

[David Lesher]

"karl gruber" > writes:

>I just installed new break pads and am wondering if there is a procedure to
>brake them in?


As opposed to installing new brake pads and breaking them in, I suppose...
--
A host is a host from coast to
& no one will talk to a host that's close........[v].(301) 56-LINUX
Unless the host (that isn't close).........................pob 1433
is busy, hung or dead....................................20915-1433

[Jim Burns[_2_]]

Both Rapco and Kelly Aerospace have break-in procedures on their websites.
Jim

"karl gruber" > wrote in message
...
> I just installed new break pads and am wondering if there is a procedure
to
> brake them in?
>
> Best,
> Karl:)
>
>

[Ron Rosenfeld]

On Thu, 28 Jun 2007 17:13:38 -0700, "karl gruber"
> wrote:

>I just installed new break pads and am wondering if there is a procedure to
>brake them in?
>
>Best,
>Karl:)
>

There are different methods of breaking in brake pads, depending on the
type of pad.
--ron

[Roger (K8RI)]

On Thu, 28 Jun 2007 17:13:38 -0700, "karl gruber"
> wrote:

>I just installed new break pads and am wondering if there is a procedure to
>brake them in?

I just put 'em on and use 'em. Never had any problems yet.

They're broke in by the time I get to the end of the taxiway.


>
>Best,
>Karl:)
>

[Roger (K8RI)]

On Fri, 29 Jun 2007 07:49:26 -0500, "Jim Burns"
> wrote:

>Both Rapco and Kelly Aerospace have break-in procedures on their websites.

If they are hydraulically operated disk brakes what reason could there
be for a break in? Even highly polished disks will roughen within a
day or two from moisture in the air and the pads should seat fully on
the disks with no special effort even if the disks are grooved.

>Jim
>
>"karl gruber" > wrote in message
...
>> I just installed new break pads and am wondering if there is a procedure
>to
>> brake them in?
>>
>> Best,
>> Karl:)
>>
>>
>

[Jim Burns[_2_]]

The purpose is to wear off any high spots and create a light glaze on the
pads which will remain with normal use. Lack of proper glazing will wear
the pads pre-maturely.

http://www.parker.com/ag/wbd/cleveland/pdf/Wbtech.PDF has procedures for
both metallic and organic pads. Rapco's procedure is below.

Jim


Rapco, Inc:
Our normal break-in procedure for brake discs using the Rapco, Inc. RA164-
discs, is to get the friction material
hot (Approx. 850 Deg. F.) by performing the following:

a.. Use proper maintenance techniques by insuring that the friction
material is completely clean and dry of all
solvents and hydraulic fluid
b.. Perform a moderate-speed taxi (10-15Kts ground speed), insuring that
you have proper braking
(There will be very little brake action at first).
c.. Allow the brake to cool by taxiing across the airport or down field,
without using brakes. If you are not
going to fly the aircraft during the break-in procedure, then allow the
brakes to cool
for 45 min. until the next high-speed taxi stop.
d.. Once you've established positive brake action, you can proceed to a
full-stop landing using significant braking.
(Short field landing procedure). At this time the pilot should notice the
brakes starting to grab more.
If this is sufficient braking action, there is no need for another stop
cycle.
e.. Perform another short field landing, leaving the landing gear extended
throughout the landing pattern.
This allows the brakes to cool properly before the next heat cycle. After
this landing you should have
significant brake action
Paker:


"Roger (K8RI)" > wrote in message
...
> On Fri, 29 Jun 2007 07:49:26 -0500, "Jim Burns"
> > wrote:
>
> >Both Rapco and Kelly Aerospace have break-in procedures on their
websites.
>
> If they are hydraulically operated disk brakes what reason could there
> be for a break in? Even highly polished disks will roughen within a
> day or two from moisture in the air and the pads should seat fully on
> the disks with no special effort even if the disks are grooved.
>
> >Jim
> >
> >"karl gruber" > wrote in message
> ...
> >> I just installed new break pads and am wondering if there is a
procedure
> >to
> >> brake them in?
> >>
> >> Best,
> >> Karl:)
> >>
> >>
> >

[One's Too Many]

On Jun 29, 11:21 pm, "Roger (K8RI)" > wrote:
> On Thu, 28 Jun 2007 17:13:38 -0700, "karl gruber"
>
> > wrote:
> >I just installed new break pads and am wondering if there is a procedure to
> >brake them in?
>
> I just put 'em on and use 'em. Never had any problems yet.
>
> They're broke in by the time I get to the end of the taxiway.

Ditto. One side was not as quite effective as the other at first and
the plane had a bit of a tendency to veer to the right with equal
pressure on the pedals, but after a bit more taxiing around and
alternately heating and cooling each side, they evened up nicely. Then
after about 4 or 5 total landings to a full stop, both new brakes
worked perfectly balanced.

[Roger (K8RI)]

On Mon, 2 Jul 2007 08:02:42 -0500, "Jim Burns"
> wrote:

>The purpose is to wear off any high spots and create a light glaze on the
>pads which will remain with normal use. Lack of proper glazing will wear
>the pads pre-maturely.

My experience has been it doesn't make any difference. The disks are
high carbon steel and will be covered with rust in only one or two
days. That will take any glaze off the pads the next time they are
used and the whole process begins over again. The High spots will
wear off quickly with normal use.
>
>http://www.parker.com/ag/wbd/cleveland/pdf/Wbtech.PDF has procedures for
>both metallic and organic pads. Rapco's procedure is below.
>
>Jim
>
>
>Rapco, Inc:
>Our normal break-in procedure for brake discs using the Rapco, Inc. RA164-
>discs, is to get the friction material
>hot (Approx. 850 Deg. F.) by performing the following:
>
> a.. Use proper maintenance techniques by insuring that the friction
>material is completely clean and dry of all
> solvents and hydraulic fluid
> b.. Perform a moderate-speed taxi (10-15Kts ground speed), insuring that
>you have proper braking
> (There will be very little brake action at first).

I've never seen this. Newly applied pads work just as well as they do
after a few weeks. IOW..good. Maybe it's just all that rust in there.

> c.. Allow the brake to cool by taxiing across the airport or down field,
>without using brakes. If you are not
> going to fly the aircraft during the break-in procedure, then allow the
>brakes to cool
> for 45 min. until the next high-speed taxi stop.
> d.. Once you've established positive brake action, you can proceed to a
>full-stop landing using significant braking.
> (Short field landing procedure). At this time the pilot should notice the
>brakes starting to grab more.

OTOH I like short field landings and the majority of the landings in
the Deb would be called short field. OTOH coming in steep doesn't give
much of a roll out either. The Deb and F33 are very good planes for
short field landings.

> If this is sufficient braking action, there is no need for another stop
>cycle.

So far I've gone through about 5 sets of pads on the Deb. I've never
noticed the brakes to be ineffective with brand new pads, nor have I
noticed any change in their braking action from installation to
several weeks of use. Just a taxi to the end of the runway and go.
OTOH I don't baby them either. For short field I use maximum effort
to land and stop in the shortest space I can manage. In the opposite
extreme I try to land as short as possible with out touching the
brakes.

> e.. Perform another short field landing, leaving the landing gear extended
>throughout the landing pattern.
> This allows the brakes to cool properly before the next heat cycle. After
>this landing you should have
> significant brake action

I have that to start.

My experience may be different, but I know of no one on the field that
has bothered breaking in the pads or had problems by not going through
a break in procedure. Undoubtedly there are those on the filed who do
go through the procedure, but I don't know who they are. I don't see
anything wrong with going through the procedure you advocate, but I
don't see it as necessary either.

[Denny]

> Ditto. One side was not as quite effective as the other at first and
> the plane had a bit of a tendency to veer to the right with equal
> pressure on the pedals, but after a bit more taxiing around and
> alternately heating and cooling each side, they evened up nicely. Then
> after about 4 or 5 total landings to a full stop, both new brakes
> worked perfectly balanced.

Ya mean lurching from side to side as I taxi is not mormal????

denny