Jim Hob

Thursday, February 26, 2015

Port Townsend Wooden Boat Festival Part Three

Dawn, Saturday, the busiest day of the Festival, had arrived. I spent most of the day aboard Ellie, answering questions, but occasionally sneaking off to watch presentations and view the other boats.

The Main Attraction today, for us Welsford fans anyway, was Scamp. Howard Rice did an amazing talk. I wish I could have recorded it. The adventures Howard had taken aboard small boats are jaw dropping. He has gone around Cape Horn, both ways, in a sailing canoe, which ranks as one of the most epic journeys ever undertaken in a small boat. No, hes not crazy. Just the opposite. He trains Navy Seals in small boat handling. Small Craft Advisor magazine did a series of interviews with Howard in issues 58 through 63. In his presentation, Howard talked about his past and about the tests he had done aboard Scamp. Howard was having a microcruiser designed for him by a French designer, but replaced it with Scamp hull #3.

John Welsford did another outstanding talk later that day entitled "The Designers Role: More Than Just Drawing". This time I brought my camera and recorded the talk. Unfortunately the room was packed. My seat was near the back of the room, too far away to make a video, and the audio is not the greatest quality either. But if you crank up the volume, it is well worth listening to. John talks about the Designers role, which is turning your dreams into reality, and about how he designed Scamp to fulfill the specified design criteria.

I missed the majestic Schooner Cup races this year. I was at Johns talk instead. There are so many things to see and do at the festival that its impossible to see them all. Here is a little bit of the race.

Ive been toying with the idea of building a cedar-stripped kayak or canoe. I know next to nothing about kayaks, but the cedar strip kayaks at the festival are just so beautiful, and they look like they would be a lot of fun to build. I went to Joe Greenleys Cedar Strip Canoe & Kayak building demonstration. I went away from the presentation thinking they didnt look too difficult. A typical kayak uses a quarter mile of cedar strips!

The musical entertainment at the festival is fun. There is live music at Bar Harbor all day long. Here is a sample from "The Whateverly Brothers". Many people play their instruments on their boats and they are quite good and a lot of fun to listen to.

These boats are replicas of the longboats that Capt Vancouver used to explore Puget Sound in 1792. Every year I kick myself for not signing up early enough to go out for a rowing and sailing tour aboard them. Next year for sure!

Remember Captain Kirk Gresham, inventor of the home-made roller furler?

Heres his latest contraption he built for his Devlin cutter Eider. It keeps his full-keeled Eider comfortably upright on the beach while the tide is out. They say the tide waits for no man. Well, Kirk waits for no tide!

Here are a few more photos that I took of a few of the boats. This is a tiny, tiny fraction of the boats at the festival, which number in the hundreds. I really wish the festival was a week long instead of only three days!

Thursday, February 19, 2015

Righting moment

Thought I might do my first bit of boat design: changing the position of the Lead in the centreboard.

See where the lead is supposed to go. But the further down the weight in a boat, the better, for the greater the righting moment: the pressure to keep the boat upright at various angles of heel.
I did a calculation of what it would mean to shift the lead weight (just 20 lb) a bit further down on the centreboard.
It turns out that if I move the Lead down 6 inches, the righting moment improves by 13%, and if by 7.2 inches, it improves 15%.
On the downside, the further down the centreboard the Lead is, the harder it will be to haul the centreboard out of the water.
Still.... maybe worth going for 6" down for 13% better Righting Moment.
The excel sheet I used is here. ("A" is the designed set up; "B" is my adjustment).

Design 2553 40 Meter Sloop

This world cruising sloop was designed in 1990 but never got off the drawing boards. Here are the designers comments from that time. Please double click for zoom.

Here are the plans.

LOA 131’-3”
LWL 108’-0”
Beam 27’-11”
Draft 11’-6”
Displacement 400,000 lbs
Sail Area 6,094 sq ft

Wednesday, February 4, 2015

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Tuesday, February 3, 2015

Design 204 Orient

This is another case where we dont possess any good images but nonetheless this boat is worth some study. The profile is very beautiful and I really like the geometry of the deckhouse and the aggressive windows.

Orient was built by the Wing-on-Shing Shipyard of Hong Kong and launched in 1938.

Here are the plans.

And an article from Yachting magazine.

It is not the original owner who brought so much fame to this yacht but her second owner, Tim Mosely of San Fransisco who would sail her to victory in major West Coast races, starting in 1955. Mosley was the father of the Barient Winch Company and he used Orient for a test bed. The boat still carries a set of Barient prototype winches. An interesting aside is that the owner of Baruna (design #222) was so interested in the winches that he ordered a set for his own boat and decided to go into business with Mosely. The name Barient is a combination of the names Baruna and Orient. Hows that for yachting trivia?

Principal Dimensions
LOA 63-5"
LWL 44-0"
Beam 14-1"
Draft 8-7"
Displacement 54,000 lbs
Ballast 23,000 lbs
Sail Area 1,845 sq ft

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