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John75142
Joined: 05 Dec 2007
Posts: 56
Location: Kaufman, TX
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 Posted: Mon Apr 14, 2008 4:55 am Post subject: Powder coating |
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I am at the point of joining the rear fuselage and cabin, installing the cabin frame and got to wondering.
Is there any reason not to powder coat the steel items such as the cabin frame, gear struts etc. even the motor mount?
I'm sure this has been covered before so before I get flamed, I have only been at this since Nov.
John (Scratch building 701)
Kaufman, Tx
[quote][b]
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John Short |
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zsmith3rd(at)earthlink.ne
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| Posted: Mon Apr 14, 2008 5:12 am Post subject: Powder Coating |
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How hot does the powder coating process get while in the oven?
Haven't searched Internet for an answer, but a local firm builds trailers, fellow there told me it was "several hundred degrees for thirty minutes". Is this okay on 4130?
Regards to all.
Zed
do not archive
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stepinwolf
Joined: 21 Jan 2008
Posts: 133
Location: Canada
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| Posted: Mon Apr 14, 2008 5:28 am Post subject: Re: Powder coating |
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Zed,
The the normal procedure ( the information that was supplied to me from a professional shop ) was to heat the parts to 400 degrees, for 15 minutes, in order to cure the powder.
In as much as the motor mount is concerned, I was told by Can-Zac, www.can-zacaviation.com , that it would be safer to paint it a very light color ( preferably white, ) so that any minute cracks that might form, can be readily seen. It seems that once it's powder coated, they become harder to see.
Bob, the 701 scratch
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John Bolding
Joined: 23 May 2006
Posts: 281
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| Posted: Mon Apr 14, 2008 6:05 am Post subject: Powder Coating |
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Depends on the powder, low is a little less than 300 F high is in the
400F range.
Don't use an epoxy unless you are ok with chalking due to uv degradation
over time. John
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dougsnash(at)yahoo.com
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| Posted: Mon Apr 14, 2008 6:38 am Post subject: Powder coating |
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John, I would definately stay away from powder coating
the engine mount. Powder coating is tough stuff and
it has been shown to hide cracks on engine mounts.
Personally, I have powder coated a few parts. My "Y"
stick, my rudder pedals, my gear mounts/strut pickups.
I am very happy with the finish.
Take this all with a grain of salt as I am not yet
flying.
DOug MacDonald
CH-701 Sctach Builder
NW Ontario, Canada
Do Not Archive
--- John Short <creativesigns(at)embarqmail.com> wrote:
| Quote: | I am at the point of joining the rear fuselage and
cabin, installing the cabin frame and got to
wondering.
Is there any reason not to powder coat the steel
items such as the cabin frame, gear struts etc. even
the motor mount?
I'm sure this has been covered before so before I
get flamed, I have only been at this since Nov.
John (Scratch building 701)
Kaufman, Tx
|
Be a better friend, newshound, and
know-it-all with Yahoo! Mobile. Try it now. http://mobile.yahoo.com/;_ylt=Ahu06i62sR8HDtDypao8Wcj9tAcJ
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dougsnash(at)yahoo.com
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| Posted: Mon Apr 14, 2008 6:43 am Post subject: Powder Coating |
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I use the Eastwood Company Hotcoat system. It
requires an inital heatup of 450 deg F and then once
the powder "flows" (melts to liquid) the temperature
is lowered to 425 deg F and cooked for twenty minutes.
If 425 degF is too warm for 4130 then we would not be
able to use it for engine mounts near the exhaust.
Of course I could be wrong as this is pure "close
enough" engineering on my part. Please prove me wrong
if I am mistaken on this issue (before I fly with it).
Doug MacDonald
CH-701 Scratch Builder
NW Ontario, Canada
Do Not Archive
--- Zed Smith <zsmith3rd(at)earthlink.net> wrote:
| Quote: |
<zsmith3rd(at)earthlink.net>
How hot does the powder coating process get while in
the oven?
Haven't searched Internet for an answer, but a local
firm builds trailers, fellow there told me it was
"several hundred degrees for thirty minutes". Is
this okay on 4130?
Regards to all.
Zed
do not archive
|
Be a better friend, newshound, and
know-it-all with Yahoo! Mobile. Try it now. http://mobile.yahoo.com/;_ylt=Ahu06i62sR8HDtDypao8Wcj9tAcJ
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