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Old 09-02-2013, 02:50 PM   #1
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Switched from white to dark hull

A great improvement in color scheme! Any argument?





My standard for judging:



I wonder if the Coot was the inspiration. It passes by training ship California Bear frequently.
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Old 09-02-2013, 03:47 PM   #2
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"I wonder if the Coot was the inspiration. It passes by training ship California Bear frequently."

Oh, I think there is probably no question whatsoever! :-)
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Old 09-02-2013, 03:51 PM   #3
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A great improvement in color scheme! Any argument?
None here & I always try to be objective.
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Old 09-02-2013, 04:35 PM   #4
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I like to see a little dark green on your hull.
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Old 09-02-2013, 04:38 PM   #5
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Take that Coot to Mexico and you'll be screaming for a generator to run those multiple, gigantic, dark hull cooling, air conditioning units!!!!
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Old 09-02-2013, 04:50 PM   #6
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That color. My eyes!

Its:
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Old 09-02-2013, 05:43 PM   #7
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Take that Coot to Mexico and you'll be screaming for a generator to run those multiple, gigantic, dark hull cooling, air conditioning units!!!!
The higher over the horizon the sun is, the fewer rays hit the surface of a vertical surface such as the sides of a boat's hull. I believe the alleged heating effect of a dark hull is grossly over-estimated.
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Old 09-02-2013, 07:19 PM   #8
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The higher over the horizon the sun is, the fewer rays hit the surface of a vertical surface such as the sides of a boat's hull. I believe the alleged heating effect of a dark hull is grossly over-estimated.

I've checked with an infrared thermometer and have found between 100 - 200% difference (depending on time of day) between dark (blue, green)topsides and white superstructure on the same vessels.
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Old 09-02-2013, 07:40 PM   #9
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A dark color won`t show rust stains like a white hull.
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Old 09-02-2013, 07:42 PM   #10
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A dark color won`t show rust stains like a white hull.
Whew! Thanks, Bruce.
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Old 09-02-2013, 07:48 PM   #11
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I've checked with an infrared thermometer and have found between 100 - 200% difference (depending on time of day) between dark (blue, green)topsides and white superstructure on the same vessels.
Can't find my notes, but I took temperatures on the Coot on the 38th parallel in summer at high noon a couple years ago. White roof read something in the 70s or 80s compared to the concrete dock surface in the 140s. The dark green hull (sunny) side was in the 80s. The key is vertical versus horizontal surfaces.
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Old 09-02-2013, 07:55 PM   #12
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A great improvement in color scheme! Any argument?





My standard for judging:



I wonder if the Coot was the inspiration. It passes by training ship California Bear frequently.
A dark colour camouflages fenders that haven't been shipped prior to getting underway.
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Old 09-02-2013, 08:09 PM   #13
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Dark Hull White top Sides

One of many reasons for boats with dark hulls and white top sides is exactly what Mark is talking about. White on the mostly horizontal surfaces (to minimize the sun's impact) and any color you want on the vertical ones. That's one reason why I have the color scheme that I have. Another reason is that I love dark hulled boats even if they are a SOB to keep clean.
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Old 09-02-2013, 08:09 PM   #14
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A dark colour camouflages fenders that haven't been shipped prior to getting underway.
You caught me!
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Old 09-02-2013, 08:10 PM   #15
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OK...see ya in Mexico Mark...just don't ask for any ice and sit in my air conditioning..

I'll have to laugh at the people who lean against my dark green truck in the summer in shorts and after they stop yelping..I'll tell them it's their imagination because vertical surfaces remain cool....
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Old 09-02-2013, 08:18 PM   #16
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All-white for a boat is great camouflage in the fog.

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Old 09-02-2013, 08:18 PM   #17
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OK...see ya in Mexico Mark...just don't ask for any ice and sit in my air conditioning..
That's really the point, isn't it?
I could be dead wrong but I'll lay good money that when Mark had his boat designed, Mexico wasn't even on the boat's itinerary!

News flash! Tests show that dark cars absorb heat faster than white cars but eventually when both cars are heat soaked, their interiors result in the same temperature.
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Old 09-02-2013, 08:19 PM   #18
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My painter warned me about painting the strip on my Manatee the original Captain's Blue. He demonstrated the difference by using an infrared thermometer. The white deck was 99 and the blue strip was 167. Convinced me. I think it was 2 PM or so in the afternoon.....Miami summer.
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Old 09-02-2013, 08:21 PM   #19
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That's really the point, isn't it?
I could be dead wrong but I'll lay good money that when Mark had his boat designed, Mexico wasn't even on the boat's itinerary!

News flash! Tests show that dark cars absorb heat faster than white cars but eventually when both cars are heat soaked, their interiors result in the same temperature.
I'll buy that but I'll bet it has something to do with hear gain thrugh the windows. My boats the same..all white but the afternoon sun is beaming through drives up the temps till I close the shades. The difference is it may only take a fraction of ac to remove the heat gain from a white car/boat than a dark one..but let them both sit...sure they might reach the same temp eventually.

In the summer when I walk every morning...if I wear a white T shirt..I'm hot when I reach the boat...if I'm wearing a dark color...I'm sweating like a pig...vertical surfaces....dark colors...a big difference depite what anyone tries to tell me.

I'm having a hard time disbelieving anyone can really think otherwise.
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Old 09-02-2013, 08:49 PM   #20
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[QUOTE=SeaHorse II;177036]One of many reasons for boats with dark hulls and white top sides is exactly what Mark is talking about. White on the mostly horizontal surfaces (to minimize the sun's impact) and any color you want on the vertical ones.QUOTE]

In the interest of accuracy ... "topsides" are the sides of the hull between the waterline and the sheer. Above the sheer are the decks and superstructure.
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