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post #11 of 49 Old 10-11-2011
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Ruffel's dorsal

Bob .Here's a link to several photos of Ruffels (J1) Orca Network Incredible Photos page Scroll down down. I first met him in a kelp forest near Bedwell Harbour in 1978. Len on the Thane
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post #12 of 49 Old 10-11-2011 Thread Starter
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Kwalt:
Yes, I agree. With a wide stern you can use some overghang aft to clean up the wake and gain some sailing length so you are not dragging the transom corners. Bow overhangs have pretty much dissapeared. I think it is a mistake to lump bow and stern overhang efficiency together. I like some bow overhang on my cruising boats so I can get the ground tackle clear of the stem.
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post #13 of 49 Old 10-11-2011
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Bob .Here's a link to several photos of Ruffels (J1) Orca Network Incredible Photos page Scroll down down. I first met him in a kelp forest near Bedwell Harbour in 1978. Len on the Thane
Orca Network Incredible Photos page
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post #14 of 49 Old 10-11-2011 Thread Starter
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Kwalt:
I'm not seeing tubercles on the Orca dorsal fin. They don't use that fin to generate power so I'm not sure why they would have tubercles there. I think, like the Humpback, you would see them on the pec fins but I don't see them there either. Do you?

Those are some great pics.
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post #15 of 49 Old 10-11-2011
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Good stuff.

No one is making the argument for reserve buoyancy in the ends and seakindly motion any more?

What do you think about the newer open transoms for oceangoing boats?

There have always seemed to be complaints about inadequate drainage in the traditional cockpit design, plus you eliminate the need for two more through-hulls that could fail.
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post #16 of 49 Old 10-11-2011 Thread Starter
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James:
Not sure overhangs have much to do with seakindly motion. In fact, most boats with long overhangs would have more hull rocker so they might be more inclined to hobbyhorse.

Boats with fat sterns have plenty of "reserve buoyancy" compared to pointed ended double enders.

Open transoms are the easiest to drain as you say.
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post #17 of 49 Old 10-11-2011
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And here I've always thought "Tubercles" was the really strong surfer from Greek mythology.



Boy do I feel like an idiot.

Seriously, I'm really liking your blog, Bob. You're very good at this. Now you need to get some sponsors!


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post #18 of 49 Old 10-11-2011 Thread Starter
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Smacker:
You were thinking of "Tubercules".

Very soon my blog will be attached to a site where I will be paid for hits. I can't give out the details yet. but it is happening.

I appreciate your kind words as ever. I'm having some fun with it and the traffic is quite good.

Still got the light on for you. You must have some reason to come to Seattle.

Please visit my blog. It's fun to read.


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post #19 of 49 Old 10-11-2011
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These tubernuckle things only appear on the humpback whale. Just curious as to why, if they are desirable, they don't appear on other mammals of the seas. It appears that the humpback pectoral fins are much longer than other those on other whales, not sure if this has any impact. What do they allow the humpback to do that is different than other whales?
Or is it just that a long time ago some warty whales were ostracized from the herd and started their own group and now these warts really just serve some sort of sexual purpose, in which case they would be even more suitable for sailboats.
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post #20 of 49 Old 10-11-2011 Thread Starter
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Z;
Good question and I don't know the answer. Clearly the Orca has none. I'm not an expert on whale physiology so I wouldn't even try to guess why the Humpback has them. But if you pressed me I might say that it has to do with the amount of power the Humpback generates from the pec fins compared to the tail. The more power put into the pecs the more likely they would be to stall especially when swimming on the surface. When swimming deep I can't see them doing anything.

Yeah, that's it.

I did read the book FLUKE. So I got that going for me.

What I do know is that the designer who came up with them for ICON, Paul Bieker, is very smart. I pay attention to everything he does. A lot of people do. I also know the warts work on ICON according to the owner.

It's all fun.

Please visit my blog. It's fun to read.


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