[DeTomaso] Fwd: Re: Tranny Paint Question??
Dave Londry
davel at emspace.com
Wed Dec 14 14:12:58 EST 2016
Thanks Dave. FYI, you did not share this with the forum, just me.
Excellent information. I invite you to reply all and share it.
Rob DuMoulin
904.476.8744
rob at dumoulins.net <mailto:rob at dumoulins.net>
www.kbsi.co <http://www.kbsi.co>
http://www.linkedin.com/pub/rob-dumoulin/0/1b6/58
On Wed, Dec 14, 2016 at 12:38 AM, Dave Londry <davel at emspace.com
<mailto:davel at emspace.com>> wrote:
I don't see much action here so:
The ZF will shed heat 3 ways.
- Conduction through the bolted surfaces.
This is likely the least heat transfer and the connector spots
are probably unpainted anyway.
- Convection (moving air) over the whole case.
Very significant heat transfer but will only change if there is a
big difference in surface roughness between the finishes.
(For the same surface temperature, which will change if there is
actually enough paint to act as an insulator)
- Radiation from the whole case.
Also very significant, and the measure of a surface's ability to
radiate is called Coefficient of Emissivity
Here are some handbook numbers.
Surface Material Emissivity Coefficient
<http://www.engineeringtoolbox.com/radiation-heat-transfer-d_431.html>
- /ε -/
Alloy 24ST Polished 0.09
Alumina, Flame sprayed 0.8
Aluminum Commercial sheet 0.09
Aluminum Foil 0.04
Aluminum Commercial Sheet 0.09
Aluminum Heavily Oxidized 0.2 - 0.31
Aluminum Highly Polished 0.039 - 0.057
Aluminum Anodized 0.77
Aluminum Rough 0.07
Aluminum paint 0.27 - 0.67
Black Silicone Paint 0.93
Black Epoxy Paint 0.89
Black Enamel Paint 0.80
So you see some interesting stuff here.
- polishing aluminum impairs its ability to radiate heat
- painting it shiny improves it's ability to radiate
- painting it black improves it's ability to radiate even more.
Dave
On 2016-12-13 5:17 AM, Rob Dumoulin wrote:
> Interesting.A Anybody care to comment on how much heat powdercoat
> might retain in the transmission rather than dissipate if painted or
> polished?
>
> Rob DuMoulin
> 904.476.8744 <tel:%28904%29%20476-8744>
> [1]rob at dumoulins.net <mailto:1]rob at dumoulins.net>
> [2]www.kbsi.co <http://www.kbsi.co>
> [3]http://www.linkedin.com/pub/rob-dumoulin/0/1b6/58
> <http://www.linkedin.com/pub/rob-dumoulin/0/1b6/58>
> On Mon, Dec 12, 2016 at 1:17 PM, Brent Stewart via DeTomaso
> <[4]detomaso at server.detomasolist.com>
> <mailto:[4]detomaso at server.detomasolist.com> wrote:
>
> A A .
> A A I know, I know - don't paint the tranny.A Well, that horse
> left the
> A A barn.A It was painted when I got it and I want to touch it
> up.A No, not
> A A going to strip and blast, just want too give it a quick touch
> up.
> A A .
> A A The one on Craigslist right now had the same thing done
> A A ([1][5]http://seattle.craigslist.org/tac/cto/59157228
> <http://seattle.craigslist.org/tac/cto/59157228>)
> A A .
> A A Just wondering what paint to use? Seems like the same paint
> color some
> A A have used to touch up Campy wheels? appreciate any info you
> have...
> A A .
> A A thanks!
> A A brent
> A A .
> References
> A A 1. [6]http://seattle.craigslist.org/tac/cto/59157228
> <http://seattle.craigslist.org/tac/cto/59157228>
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> References
>
> 1.mailto:rob at dumoulins.net
> 2.http://www.kbsi.co/
> 3.http://www.linkedin.com/pub/rob-dumoulin/0/1b6/58
> <http://www.linkedin.com/pub/rob-dumoulin/0/1b6/58>
> 4.mailto:detomaso at server.detomasolist.com
> <mailto:detomaso at server.detomasolist.com>
> 5.http://seattle.craigslist.org/tac/cto/59157228
> <http://seattle.craigslist.org/tac/cto/59157228>
> 6.http://seattle.craigslist.org/tac/cto/59157228
> <http://seattle.craigslist.org/tac/cto/59157228>
> 7.mailto:DeTomaso at server.detomasolist.com
> <mailto:DeTomaso at server.detomasolist.com>
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>
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--
Dave Londry
Embedded Spaces Inc. (ESI)
davel at emspace.com <mailto:davel at emspace.com>
904 429 1937 <tel:%28904%29%20429-1937> (SkypeCall FLA)
Skype:embeddedspaces
Canada Numbers
604 721 2278 <tel:%28604%29%20721-2278> (cell)
604 589 9182 <tel:%28604%29%20589-9182> (shop line)
604 589 9183 <tel:%28604%29%20589-9183> (home line)
-------------- next part --------------
Thanks Dave. FYI, you did not share this with the forum, just me.
Excellent information. I invite you to reply all and share it.
Rob DuMoulin
904.476.8744
[1]rob at dumoulins.net
[2]www.kbsi.co
[3]http://www.linkedin.com/pub/rob-dumoulin/0/1b6/58
On Wed, Dec 14, 2016 at 12:38 AM, Dave Londry <[4]davel at emspace.com>
wrote:
I don't see much action here so:
The ZF will shed heat 3 ways.
- Conduction through the bolted surfaces.
This is likely the least heat transfer and the connector spots are
probably unpainted anyway.
- Convection (moving air) over the whole case.
Very significant heat transfer but will only change if there is a big
difference in surface roughness between the finishes.
(For the same surface temperature, which will change if there is
actually enough paint to act as an insulator)
- Radiation from the whole case.
Also very significant, and the measure of a surface's ability to
radiate is called Coefficient of Emissivity
Here are some handbook numbers.
Surface Material [5]Emissivity Coefficient
- e -
Alloy 24ST Polished 0.09
Alumina, Flame sprayed 0.8
Aluminum Commercial sheet 0.09
Aluminum Foil 0.04
Aluminum Commercial Sheet 0.09
Aluminum Heavily Oxidized 0.2 - 0.31
Aluminum Highly Polished 0.039 - 0.057
Aluminum Anodized 0.77
Aluminum Rough 0.07
Aluminum paint 0.27 - 0.67
Black Silicone Paint 0.93
Black Epoxy Paint 0.89
Black Enamel Paint 0.80
So you see some interesting stuff here.
- polishing aluminum impairs its ability to radiate heat
- painting it shiny improves it's ability to radiate
- painting it black improves it's ability to radiate even more.
Dave
On 2016-12-13 5:17 AM, Rob Dumoulin wrote:
Interesting.A Anybody care to comment on how much heat powdercoat
might retain in the transmission rather than dissipate if painted or
polished?
Rob DuMoulin
[6]904.476.8744
[[7]1]rob at dumoulins.net
[2][8]www.kbsi.co
[3][9]http://www.linkedin.com/pub/rob-dumoulin/0/1b6/58
On Mon, Dec 12, 2016 at 1:17 PM, Brent Stewart via DeTomaso
[10]<[4]detomaso at server.detomasolist.com> wrote:
A A .
A A I know, I know - don't paint the tranny.A Well, that horse
left the
A A barn.A It was painted when I got it and I want to touch it
up.A No, not
A A going to strip and blast, just want too give it a quick touch
up.
A A .
A A The one on Craigslist right now had the same thing done
A A ([1][5][11]http://seattle.craigslist.org/tac/cto/59157228)
A A .
A A Just wondering what paint to use? Seems like the same paint
color some
A A have used to touch up Campy wheels? appreciate any info you
have...
A A .
A A thanks!
A A brent
A A .
References
A A 1. [6][12]http://seattle.craigslist.org/tac/cto/59157228
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References
1. [15]mailto:rob at dumoulins.net
2. [16]http://www.kbsi.co/
3. [17]http://www.linkedin.com/pub/rob-dumoulin/0/1b6/58
4. [18]mailto:detomaso at server.detomasolist.com
5. [19]http://seattle.craigslist.org/tac/cto/59157228
6. [20]http://seattle.craigslist.org/tac/cto/59157228
7. [21]mailto:DeTomaso at server.detomasolist.com
8. [22]http://server.detomasolist.com/mailman/listinfo/detomaso
_______________________________________________
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osted here to all past, current, or future members of the list. They also grant
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t messages.
--
Dave Londry
Embedded Spaces Inc. (ESI)
[25]davel at emspace.com
[26]904 429 1937 (SkypeCall FLA)
Skype:embeddedspaces
Canada Numbers
[27]604 721 2278 (cell)
[28]604 589 9182 (shop line)
[29]604 589 9183 (home line)
References
1. mailto:rob at dumoulins.net
2. http://www.kbsi.co/
3. http://www.linkedin.com/pub/rob-dumoulin/0/1b6/58
4. mailto:davel at emspace.com
5. http://www.engineeringtoolbox.com/radiation-heat-transfer-d_431.html
6. tel:%28904%29%20476-8744
7. mailto:1]rob at dumoulins.net
8. http://www.kbsi.co/
9. http://www.linkedin.com/pub/rob-dumoulin/0/1b6/58
10. mailto:[4]detomaso at server.detomasolist.com
11. http://seattle.craigslist.org/tac/cto/59157228
12. http://seattle.craigslist.org/tac/cto/59157228
13. mailto:7]DeTomaso at server.detomasolist.com
14. http://server.detomasolist.com/mailman/listinfo/detomaso
15. mailto:rob at dumoulins.net
16. http://www.kbsi.co/
17. http://www.linkedin.com/pub/rob-dumoulin/0/1b6/58
18. mailto:detomaso at server.detomasolist.com
19. http://seattle.craigslist.org/tac/cto/59157228
20. http://seattle.craigslist.org/tac/cto/59157228
21. mailto:DeTomaso at server.detomasolist.com
22. http://server.detomasolist.com/mailman/listinfo/detomaso
23. mailto:DeTomaso at server.detomasolist.com
24. http://server.detomasolist.com/mailman/listinfo/detomaso
25. mailto:davel at emspace.com
26. tel:%28904%29%20429-1937
27. tel:%28604%29%20721-2278
28. tel:%28604%29%20589-9182
29. tel:%28604%29%20589-9183
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