Bob Perry's take on Wolfenzee's dream boat - Page 113 - SailNet Community
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post #1121 of 1160 Old 07-15-2013
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Re: Bob Perry's take on Wolfenzee's dream boat

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Originally Posted by bobperry View Post
That's a beaut Hart. That is very graceful. Who owns that ship?
I wonder if they got that shape by welding at the centerline first and then bending the plates?
I'm not sure about that one, but I know about this one:



AIUI, the 8mm flat steel plates are pressed individually using an enormous hydraulic ram (looks a bit like an huge upside down car jack with a rounded shoe on the end) onto timber or scrap-steel formers and then cut with a gas axe, hoisted and (usually) welded into place on the frames. Not all that different in process to planking a timber boat, actually.

I saw them replacing the bow of the Doulos in Singapore Harbour late last century (I was onboard at the time) and, apart from the fact that the bow was being replaced whilst the ship was still in the water(!), it's a fascinating operation to watch, because the press operator needs to judge exactly how much force is the right amount to apply to create the correct curve in 3 dimensions. They usually got it right first time every time with nothing more than a force gauge and good eyesight.

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post #1122 of 1160 Old 07-15-2013
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Re: Bob Perry's take on Wolfenzee's dream boat

Shitski Hart, that's amazing. No telling what shapes you can craft with steel if you have an eye.
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post #1123 of 1160 Old 07-15-2013
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Re: Bob Perry's take on Wolfenzee's dream boat

Bob, when they are new the pieces are cold rolled in plate from the factory for many of those shapes, and many special shapes are preformed as well by using a giant english wheel on them.



This one is a nice large hull plate being formed in a roller, I am sure you have been in a sheet metal shop and seen a press roller, the thickest hull plate can be rolled, just takes a bigger roller.

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post #1124 of 1160 Old 07-16-2013
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Re: Bob Perry's take on Wolfenzee's dream boat

Mark:
Thanks.
I've seen those tools before. My son, Spike, worked in a steel fabrictaing shop. I just marvel at the complex geometry of a stern like that. It's pure art to me.
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post #1125 of 1160 Old 07-16-2013
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Re: Bob Perry's take on Wolfenzee's dream boat

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Originally Posted by bobperry View Post
Mark:
Thanks.
I've seen those tools before. My son, Spike, worked in a steel fabrictaing shop. I just marvel at the complex geometry of a stern like that. It's pure art to me.
It is, and I love to watch them. When I had my pipe yard there in The Port of Houston it was directly on the ship channel, right across from City Dock 29-32 and I got to see the ships coming in to their berths all the time. There is a restaurant called Brady's Landing that is also on the ship channel in the Port of Houston, but on the public access side, that overlooks the turning basin, you can watch working ships while you eat some of the best prime rib you ever tasted.

I also used to work a lot in the Ports of Galveston, Jacksonville, Long Beach, Sacramento, Tacoma, and Baltimore, so I got to see a lot of really big and really interesting ships. Since I was involved in the shipping business and had a TWIC card I was often on the ships, in the holds, and have toured a lot of them, I am always fascinated at what it took to build them, and how much work it is to maintain them.

I hope you enjoy your sail today.

Mark

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post #1126 of 1160 Old 07-16-2013
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Re: Bob Perry's take on Wolfenzee's dream boat

Too bad some of this knowledge isn't transposed to the steel boat thread.

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Re: Bob Perry's take on Wolfenzee's dream boat

Remember reading a Jay benford book where he used similar sterns in a 40'pilot house.

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post #1128 of 1160 Old 07-16-2013
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Re: Bob Perry's take on Wolfenzee's dream boat

Yeah, that was the design he did for the marine illustrator Steve Davis, RIP. Nice looking boat.

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post #1129 of 1160 Old 07-16-2013
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Re: Bob Perry's take on Wolfenzee's dream boat

Most of Benford's boats look good. As to their sailing abilities - ????

I was aboard Sunrise at the Townsend festival years ago. Finished completely inside & out with gloss Deks Olje. It was the stuff of a boys dreams, square sail & all. I imagine it needed a gale to even go downwind though.
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post #1130 of 1160 Old 07-16-2013
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Re: Bob Perry's take on Wolfenzee's dream boat

Jon:
I think Jay would take exception to that. He once told the story of how he "beat" a Cal 39 in the pinky. My theory was that the Cal 39 skipper was probably distracted and polishing his dolphin a the time. We'll never know. We all have that day when we walked past a much faster boat. Those are the days you remember. Like my 165 yard 5 iron approach shot on the 8th that I holed.

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