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erichdtrombley(at)juno.co
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 Posted: Sun Aug 14, 2016 6:46 am Post subject: Powder Coating Tailwheel Spring |
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Hello all,
Does anyone have any experience with powder coating their Tailwheel Spring? Is there a concern about the oven temp necessary to melt the powder and the potential affect on the temper of the steel. I see that they are now producing some low melt temp powders (340 deg F.). However, I do not know what temperature the spring was temped at. I suspect much higher, probably around 500 deg F., Although, I would rather not guess. Thoughts?
Blue skies,
Erich Trombley
N28ET Classic Mono 914
Sent from my iPad
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EverydayLivingHealth
62Year Old Wife Surprises Husband, Cries After Sees Makeover
http://thirdpartyoffers.juno.com/TGL3131/57b083c4802a03c358f6st01duc
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hagargs(at)earthlink.net
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| Posted: Sun Aug 14, 2016 6:57 am Post subject: Powder Coating Tailwheel Spring |
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Erich,
I did mine with no discernible ill effects. Though it only has about 30 landings on it. I did in my oven in the kitchen so I was in control of the temp. My thoughts are that chicken baking temperatures do not adversely effect tailwheel springs.
Steve
--
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Fred Klein
Joined: 26 Mar 2012
Posts: 503
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| Posted: Sun Aug 14, 2016 3:43 pm Post subject: Powder Coating Tailwheel Spring |
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Erich…I powder coated mine w/o a worry about de-tempering…or would that be distempering?…have yet to test its performance upon returning to the surly bonds of Earth...F.
| Quote: | On Aug 14, 2016, at 7:44 AM, Erich Trombley <erichdtrombley(at)juno.com> wrote:
Hello all,
Does anyone have any experience with powder coating their Tailwheel Spring? Is there a concern about the oven temp necessary to melt the powder and the potential affect on the temper of the steel. I see that they are now producing some low melt temp powders (340 deg F.). However, I do not know what temperature the spring was temped at. I suspect much higher, probably around 500 deg F., Although, I would rather not guess. Thoughts?
Blue skies,
Erich Trombley
N28ET Classic Mono 914
Sent from my iPad
____________________________________________________________
EverydayLivingHealth
62Year Old Wife Surprises Husband, Cries After Sees Makeover
http://thirdpartyoffers.juno.com/TGL3131/57b083c4802a03c358f6st01duc
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erichdtrombley(at)juno.co
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| Posted: Mon Aug 15, 2016 8:38 am Post subject: Powder Coating Tailwheel Spring |
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Good day,
Thanks to everyone for your responses on powder coating. I also received a response suggesting nickel plating instead of powder coating. This would be my preferred choice if flexing of the tailwheel spring won't cause the plating to flake off. Thoughts?
Erich
____________________________________________________________
EverydayLivingHealth
62-Year-Old Surprises Husband, Cries After Seeing Makeover
http://thirdpartyoffers.juno.com/TGL3132/57b1ef4a9105a6f4a4098st01vuc
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Dave Disney
Joined: 16 Aug 2010
Posts: 54
Location: Weston-Super-Mare
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| Posted: Mon Aug 15, 2016 11:14 am Post subject: Re: Powder Coating Tailwheel Spring |
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Hi Erich,
As an alternative, I've re-sprayed mine and then covered it with 3M 8672 clear polyurethane protective tape. I haven't flown with it yet, but I'm hoping that the tape will afford some protection for the paint from stone chips etc. I once used this tape as a gap seal on my Airtourer's flapperons so I know it can withstand air loads and remain stuck on in a hostile environment.
Dave
G-RJWX
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rehn(at)rockisland.com
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| Posted: Mon Aug 15, 2016 11:16 am Post subject: Powder Coating Tailwheel Spring |
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Want to keep it simple? Paint it, then cover with clear prop tape, keeps the paint from dings, inexpensive, flexible, lasts.
Jerry
Sent from my iPad
On Aug 15, 2016, at 9:34 AM, Erich Trombley <erichdtrombley(at)juno.com (erichdtrombley(at)juno.com)> wrote:
| Quote: | Good day,
Thanks to everyone for your responses on powder coating. I also received a response suggesting nickel plating instead of powder coating. This would be my preferred choice if flexing of the tailwheel spring won't cause the plating to flake off. Thoughts?
Erich
____________________________________________________________
EverydayLivingHealth
62-Year-Old Surprises Husband, Cries After Seeing Makeover
http://thirdpartyoffers.juno.com/TGL3132/57b1ef4a9105a6f4a4098st01vuc
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budyerly(at)msn.com
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| Posted: Mon Aug 15, 2016 11:18 am Post subject: Powder Coating Tailwheel Spring |
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Eric,
It was a pleasure seeing you again at Oshkosh.
From a common website for steel tempering called Total Materia:
It is necessary, therefore, to warm the steel below the critical range in order to relieve stresses and to allow the arrested reaction of cementite precipitation to take place. This is known as tempering. - 150-250°C. The object is heated in an oil bath, immediately after quenching, to prevent related cracking, to relieve internal stress and to decompose austenite without much softening.
- 200-450°C. Used to toughen the steel at the expense of hardness. Brinell hardness is 350-450.
- 450-700°C. The precipitated cementite coalesces into larger masses and the steel becomes softer. The structure is known as sorbite, which at the higher temperatures becomes coarsely spheroidised. It etches more slowly than troostite and has a Brinell hardness of 220-350. Sorbite is commonly found in heat-treated constructional steels, such as axles, shafts and crankshafts subjected to dynamic stresses. A treatment of quenching and tempering in this temperature range is frequently referred to as toughening, and it produces an increase in the ratio of the elastic limit to the ultimate tensile strength.
The guys who make the tapered gear for the RV prefer to limit the powder coaters to no more than 450F or about 250C back when they were in Chicago. Different folks now.
Now that temperature range means that the powder coater must keep his oven running longer to fully flow his paint on a gear leg. They don’t like to do that. The RV community is buying the factory powder coated gear. Only problem is it covers up cracks in the welded spindle end you will never see. Also corrosion gets underneath the powder coating as the bolt holes and wear points are not coated and needs a metal anticorrosion seal like ACP50 or similar to resist this tendency.
Plain old metal primer and a tough paint like an aircraft polyurethane or even Rustolium primer and top coat lasts quite a while. My concern in Florida is rust, which is less of a problem for you in “Lost Wages” (Las Vegas, NV, USA). Just a flexible paint should last forever out there unless it’s a cheap enamel.
Just talk to your powder coater. A 3/4 inch piece of steel has no business in the oven with a bunch of sheet metal. The paint never gets to its gel point and it fails. So in my case the thick piece, according to his paint type (TCI Powder Coating), needed a low 250F degrees for nearly 10 hours where as the sheet metal only needed about 2 hours.
Heck of a thing. I did the oven coated stuff as someone suggested already on some of my parts and it worked pretty well for an hour in the the oven. It wasn’t very shiny but it covered well except where my prep was not so good. It looks flat in comparison to my aviation paint and wears fairly well because the paint or powder did not flow out and stay flowed for long enough... It stunk up the house a bit but only a wife could smell it. It was a rental house until our current home was finished so it didn’t bother me. It just was not worth the criticism from the wife. Some of these paints are toxic so read the directions well.
Nickel plating doesn’t hold up well to abrasion, but is excellent at sealing the metal. Not worth the cost and down time to me.
Rustoleum (not the spray can stuff) is cheap and fast. Wears well, easy to touch up and if properly prepped, lasts as long as anything else on flexing metal gear. My opinion.
Regards,
Bud Yerly
Custom Flight Creations.
From: Erich Trombley (erichdtrombley(at)juno.com)
Sent: Monday, August 15, 2016 12:34 PM
To: europa-list(at)matronics.com (europa-list(at)matronics.com)
Subject: Re: Powder Coating Tailwheel Spring
Good day,
Thanks to everyone for your responses on powder coating. I also received a response suggesting nickel plating instead of powder coating. This would be my preferred choice if flexing of the tailwheel spring won't cause the plating to flake off. Thoughts?
Erich
____________________________________________________________
EverydayLivingHealth
62-Year-Old Surprises Husband, Cries After Seeing Makeover
http://thirdpartyoffers.juno.com/TGL3132/57b1ef4a9105a6f4a4098st01vuc
| | - The Matronics Europa-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:
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SPURPURA
Joined: 04 Apr 2015
Posts: 68
Location: KAPV
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| Posted: Thu Aug 18, 2016 3:18 am Post subject: Re: Powder Coating Tailwheel Spring |
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I had it chrome plated on N77EU and very satisfied with the results.
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N951EU - Tri-gear & 912ULS, N77EU- Mono & 914
I'D RATHER HAVE A BOTTLE IN FRONT OF ME THAN A FRONTAL LABOTAMY. |
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