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Kellym
Joined: 10 Jan 2006
Posts: 1705
Location: Sun Lakes AZ
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 Posted: Thu Nov 07, 2013 6:40 pm Post subject: Bussing W58 Series Breakers |
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Hmmm,
Your A&P school had it wrong. With pure copper, such as spark plug
gaskets it makes zero difference whether you quench or not.
Other metals are very different, but copper does not need quenching.
http://en.wikipedia.org/wiki/Annealing_%28metallurgy%29
Quenching with most metals makes it harder, not softer. Copper again is
an exception where quenching doesn't harden, but it doesn't soften either.
On 11/7/2013 10:03 AM, Bill wrote:
| Quote: | I disagree with letting it "cool in air" */unless/* the alloys of
copper water-pipe and spark-plug gaskets differ significantly which I
doubt*.*
*
*
As a fledgling A&P in 1973 we were taught to heat copper spark-plug
gaskets to "cherry red" and */quench immediately in water/*.
I admit having no experience with allowing the gaskets to cool in air.
Here's an EAA demo:
http://www.eaavideo.org/video.aspx?v=57437956001
Respectfully -
Bill
SF bay area
On 7 November 2013 12:27,
you
wrote:
I do the same, however, the copper tube (I use the stuff that
is used as water pipes in houses) is hard drawn and slightly
brittle. To get around that I use a small blowtorch to heat
it up until it glows red hot and then let it cool in air.
That anneals it and makes it softer and more resistant to
cracking and easier to form- like when you flatten it.
*
*
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_________________
Kelly McMullen
A&P/IA, EAA Tech Counselor # 5286
KCHD |
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wtmills
Joined: 05 Feb 2007
Posts: 32
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| Posted: Thu Nov 07, 2013 7:25 pm Post subject: Bussing W58 Series Breakers |
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Hi Kelly -
Likely it was a time consideration: quench instantly in water rather than gradually in air.
BTW, water quenching wasn't learned in school. As a "fledgling A&P" I was a graduate, licensed and employed at an FBO/Repair Station (water quenching learned here). No matter, both systems work equally well. As I said initially below; "I admit having no experience with allowing the gaskets to cool in air". Now I know TWO systems.
Thanks for the input -
Bill
On Thu, Nov 7, 2013 at 6:38 PM, Kelly McMullen <kellym(at)aviating.com (kellym(at)aviating.com)> wrote:
[quote]--> AeroElectric-List message posted by: Kelly McMullen <kellym(at)aviating.com (kellym(at)aviating.com)>
Hmmm,
Your A&P school had it wrong. With pure copper, such as spark plug gaskets it makes zero difference whether you quench or not.
Other metals are very different, but copper does not need quenching. http://en.wikipedia.org/wiki/Annealing_%28metallurgy%29
Quenching with most metals makes it harder, not softer. Copper again is an exception where quenching doesn't harden, but it doesn't soften either.
On 11/7/2013 10:03 AM, Bill wrote:
| Quote: | I disagree with letting it "cool in air" */unless/* the alloys of copper water-pipe and spark-plug gaskets differ significantly which I doubt*.*
*
*
As a fledgling A&P in 1973 we were taught to heat copper spark-plug gaskets to "cherry red" and */quench immediately in water/*.
I admit having no experience with allowing the gaskets to cool in air.
Here's an EAA demo:
http://www.eaavideo.org/video.aspx?v=57437956001
Respectfully -
Bill
SF bay area
On 7 November 2013 12:27,
you
wrote:
I do the same, however, the copper tube (I use the stuff that
is used as water pipes in houses) is hard drawn and slightly
brittle. To get around that I use a small blowtorch to heat
it up until it glows red hot and then let it cool in air. That anneals it and makes it softer and more resistant to
cracking and easier to form- like when you flatten it.
*
*
|
====================================
om" target="_blank">www.aeroelectric.com
ooks.com" target="_blank">www.buildersbooks.com
et="_blank">www.homebuilthelp.com
et="_blank">www.mypilotstore.com
"_blank">www.mrrace.com
="_blank">http://www.matronics.com/contribution
le, List Admin.
====================================
-List" target="_blank">http://www.matronics.com/Navigator?AeroElectric-List
====================================
http://forums.matronics.com
====================================
[b]
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Kellym
Joined: 10 Jan 2006
Posts: 1705
Location: Sun Lakes AZ
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| Posted: Thu Nov 07, 2013 7:31 pm Post subject: Bussing W58 Series Breakers |
|
|
Sure. I maintain enough extra gaskets that I put fresh ones on, the
anneal the old ones at my leisure. I just string them on some old safety
wire, heat, then let cool and they are ready for next plug servicing.
On 11/7/2013 8:23 PM, Bill wrote:
| Quote: | Hi Kelly -
Likely it was a time consideration: quench instantly in water rather
than gradually in air.
BTW, water quenching wasn't learned in school. As a "fledgling A&P" I
was a graduate, licensed and employed at an FBO/Repair Station (water
quenching learned here). No matter, both systems work equally well. As
I said initially below; "I admit having no experience with allowing
the gaskets to cool in air". Now I know TWO systems.
Thanks for the input -
Bill
On Thu, Nov 7, 2013 at 6:38 PM, Kelly McMullen <kellym(at)aviating.com
<mailto:kellym(at)aviating.com>> wrote:
<kellym(at)aviating.com <mailto:kellym(at)aviating.com>>
Hmmm,
Your A&P school had it wrong. With pure copper, such as spark plug
gaskets it makes zero difference whether you quench or not.
Other metals are very different, but copper does not need
quenching. http://en.wikipedia.org/wiki/Annealing_%28metallurgy%29
Quenching with most metals makes it harder, not softer. Copper
again is an exception where quenching doesn't harden, but it
doesn't soften either.
On 11/7/2013 10:03 AM, Bill wrote:
I disagree with letting it "cool in air" */unless/* the alloys
of copper water-pipe and spark-plug gaskets differ
significantly which I doubt*.*
*
*
As a fledgling A&P in 1973 we were taught to heat copper
spark-plug gaskets to "cherry red" and */quench immediately in
water/*.
I admit having no experience with allowing the gaskets to cool
in air.
Here's an EAA demo:
http://www.eaavideo.org/video.aspx?v=57437956001
Respectfully -
Bill
SF bay area
On 7 November 2013 12:27,
you
wrote:
I do the same, however, the copper tube (I use the
stuff that
is used as water pipes in houses) is hard drawn and
slightly
brittle. To get around that I use a small blowtorch
to heat
it up until it glows red hot and then let it cool in
air. That anneals it and makes it softer and more
resistant to
cracking and easier to form- like when you flatten it.
*
*
====================================
om" target="_blank">www.aeroelectric.com
ooks.com" target="_blank">www.buildersbooks.com
et="_blank">www.homebuilthelp.com
et="_blank">www.mypilotstore.com
"_blank">www.mrrace.com
="_blank">http://www.matronics.com/contribution
le, List Admin.
====================================
-List"
target="_blank">http://www.matronics.com/Navigator?AeroElectric-List
====================================
http://forums.matronics.com
====================================
*
*
|
| | - The Matronics AeroElectric-List Email Forum - | | | Use the List Feature Navigator to browse the many List utilities available such as the Email Subscriptions page, Archive Search & Download, 7-Day Browse, Chat, FAQ, Photoshare, and much more:
http://www.matronics.com/Navigator?AeroElectric-List |
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_________________
Kelly McMullen
A&P/IA, EAA Tech Counselor # 5286
KCHD |
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BobsV35B(at)aol.com
Guest
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| Posted: Wed Nov 13, 2013 5:06 am Post subject: Bussing W58 Series Breakers |
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For what it is worth. As an apprentice aircraft mechanic 65 plus years ago, I was taught to quench the spark plug gaskets in motor oil!
Where did we all go wrong? <G>
Happy Skies,
Old Bob
In a message dated 11/7/2013 12:46:30 P.M. Central Standard Time, wtrooper(at)gmail.com writes:
| Quote: | Thank you for this clarification.
Bill
Do not archive
Sent via the Samsung Galaxy Note® II, an AT&T 4G LTE smartphone
-------- Original message --------
From: "R. curtis" <mrspudandcompany(at)verizon.net>
Date: 11/07/2013 10:32 AM (GMT-08:00)
To: aeroelectric-list(at)matronics.com
Subject: Re: Bussing W58 Series Breakers
| Quote: | I disagree with letting it "cool in air" unless the alloys of copper water-pipe and spark-plug gaskets differ significantly which I doubt.
| Quote: | Air cooling of the cherry red hot copper will anneal it, however it will anneal to a softer state if you quench the copper in water.
Roger
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I am using the Free version of SPAMfighter.
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