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Old 12-03-2013, 20:19   #31
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Re: BLACK BOTTOM PAINT MAKES CABIN HOT??

Simply being under sail (regardless of bottom color) seems to attract some whales....how do we keep a legal distance away when they come to us at double Idoras' hull speed? Very thrilling to see one race up and zoom below her keel.

Todd
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Old 12-03-2013, 20:30   #32
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Re: BLACK BOTTOM PAINT MAKES CABIN HOT??

Gramps, would a pair of the old red-green 3d glasses work? Blink each eye, something that is really red, or green, should disappear when seen through the wrong color filter. Then he just has to remember something like "red on right returning" and hope the right lens is the red one.

Jason,
Check your leg, in case that guy was just pulling it.
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Old 12-03-2013, 20:35   #33
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Re: BLACK BOTTOM PAINT MAKES CABIN HOT??

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Originally Posted by Captain Grandpa View Post
I hate to change the point of this thread but I have to ask. We are learning to sail. My son is also color blind. How do you deal with things like green red buoys? Or what about night lights telling which way a boat is heading when you encounter them?
Their shapes and numbers differentiate them also.
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Old 12-03-2013, 20:37   #34
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Re: BLACK BOTTOM PAINT MAKES CABIN HOT??

With blue or red bottom paint, I can look from the dock and just about see how dirty the rudder and prop are. With black, it's much harder to see the rudder.

Blue bottom paint looks quite nice with flag blue Awlgrip topsides :

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Old 12-03-2013, 20:42   #35
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Re: BLACK BOTTOM PAINT MAKES CABIN HOT??

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With blue or red bottom paint, I can look from the dock and just about see how dirty the rudder and prop are. With black, it's much harder to see the rudder.

Blue bottom paint looks quite nice with flag blue Awlgrip topsides :

They stole your propeller...
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Old 12-03-2013, 22:49   #36
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Re: BLACK BOTTOM PAINT MAKES CABIN HOT??

Gosh, doesn't everyone know you paint the bottom dayglow safety orange?
This way the helicopter can spot you after it capsizes.

Or for me, my hobie 16 had orange sails so they can find me when I got lost or stuck.


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Old 12-03-2013, 23:02   #37
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Re: BLACK BOTTOM PAINT MAKES CABIN HOT??

A bright color on top has advantages too.

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Old 12-03-2013, 23:42   #38
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Re: BLACK BOTTOM PAINT MAKES CABIN HOT??

Black paint increases the rate of of heat transfer. So it would depend on which was hotter in your area, the air in your cabin or the sea.

Not sure how much effect there would be, but should be some.

There is a reason why stoves are painted black - to radiate heat from the hot stove to cool room.
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Old 12-03-2013, 23:49   #39
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Re: BLACK BOTTOM PAINT MAKES CABIN HOT??

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A bright color on top has advantages too.

Can't you pick me out from the other boats?

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Old 13-03-2013, 17:55   #40
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Re: BLACK BOTTOM PAINT MAKES CABIN HOT??

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Black paint looks better
I respecfully disagree. GO BLUE
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Old 21-03-2013, 03:26   #41
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Re: BLACK BOTTOM PAINT MAKES CABIN HOT??

just thought I'd add this comment from rescuers of a capsized boat:

Quote:
One of the more interesting conclusions of the report was that the upturned vessel would have been visible from a much greater distance by rescue crews had the hull been painted with a bright colour. This, of course, is a no-brainer. There's nothing to be lost by painting the hull of one's yacht red.

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Gosh, doesn't everyone know you paint the bottom dayglow safety orange?
This way the helicopter can spot you after it capsizes.

Or for me, my hobie 16 had orange sails so they can find me when I got lost or stuck.


JackB
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Old 21-03-2013, 08:57   #42
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interestingly, different color paints weigh more within same brand. Noticeably so if you lift a gallon of each.
It was explained to me that certain colors are lighter(in weight) due to interference between copper and pigment, as a result some colors actually stay clean much better.
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Old 21-03-2013, 09:51   #43
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Re: BLACK BOTTOM PAINT MAKES CABIN HOT??

I agree with the other replies about it being difficult to see when you have a bottom with black paint. I had black bottom paint for 19 months and changed it to blue for that reason. I dive my own bottom and it just makes it easier.

I have always alternated colors of paint to see when the current paint is wearing out, which is a no brainer.

I don't know if you were asking about heat transfer as a theoretical question or actual application... But if you have ocean water warm enough to have heat transfer through your hull, then I would assume the Air Tempature and sun light would effect the cabin tempature significantly more and wouldn't worry about heat transfer through your hull, regardless of the bottom paint color.
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Old 21-03-2013, 14:11   #44
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Re: BLACK BOTTOM PAINT MAKES CABIN HOT??

Friends of ours do have a Mini (Transat) with orange painted foils ... and I got to see them come out of the water when they had an unfortunate round-up.
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