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04-06-2018, 12:52 AM - 1 Like   #46
Des
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Shallow Inlet, Victoria. K-3 + DA 55-300 PLM.



04-06-2018, 02:40 AM - 1 Like   #47
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Sandy Bay, Tasmania

04-18-2018, 11:12 PM - 3 Likes   #48
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A foggy day at Walkerville, Victoria. K-3 + DA 55-300 PLM.

05-05-2018, 08:23 PM - 4 Likes   #49
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Port Stephens

I've got quite a lot waiting to process and very little time at the moment. It will be a dribble.



07-28-2018, 04:25 PM - 3 Likes   #50
Des
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Glassy waters at Rhyll, Phillip Island, Victoria. K-S2 + DA 18-135

07-28-2018, 10:14 PM - 1 Like   #51
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More from Rhyll, Phillip Island. K-3 + DA 55-300 PLM (x-post)





07-31-2018, 12:00 AM   #52
Des
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More yachts from Rhyll, Phillip Island.

K-3 + DA 55-300 PLM


K-S2 + DA 18-135


07-31-2018, 12:58 AM - 3 Likes   #53
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3 pictures of a boat I designed for a senior design project as an engineering student at Stony Brook University on Long Island in 1972. As a graduate engineering student, we built her and raced her for the world speed record. She was named [nf]^2 (which stands for: n f squared; which is shorthand for Neither Fish Nor Fowl) and held the B-class and 10^2 meter class world speed records for a couple of years.

The hull is a single hull from a Tornado catamaran and the sails are, likewise, from a Tornado.


Taken with a Pentax Spotmatic F and a SMC Takumar 55mm ƒ1.8 lens.
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08-12-2018, 07:26 AM - 2 Likes   #54
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Almost In The Super Yacht Category...

08-12-2018, 11:59 PM   #55
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Hi Kerrowdown

You've got a nice isle hopper there

Dave
08-13-2018, 12:04 AM   #56
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QuoteOriginally posted by subsea Quote
3 pictures of a boat I designed for a senior design project as an engineering student at Stony Brook University on Long Island in 1972. As a graduate engineering student, we built her and raced her for the world speed record. She was named [nf]^2 (which stands for: n f squared; which is shorthand for Neither Fish Nor Fowl) and held the B-class and 10^2 meter class world speed records for a couple of years.

The hull is a single hull from a Tornado catamaran and the sails are, likewise, from a Tornado.


Taken with a Pentax Spotmatic F and a SMC Takumar 55mm ƒ1.8 lens.
Hi Mark

Not being a engineering grad but just how is half a Tornado Catamaran your design ?

Interested thats all

My cousin put a 18 foot skiff rig on a 14 foot skiff it was quick

Dave
08-13-2018, 12:05 AM - 1 Like   #57
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QuoteOriginally posted by Des Quote
More yachts from Rhyll, Phillip Island.

K-3 + DA 55-300 PLM


K-S2 + DA 18-135
Hi Des

Nice series ..and part of the world


Dave
08-13-2018, 02:13 AM   #58
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08-13-2018, 03:51 AM   #59
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QuoteOriginally posted by dbs Quote
Not being a engineering grad but just how is half a Tornado Catamaran your design ?
I'm picking that it's not the hull he and team engineered but rather the hydrofoil system that lifts the hull out of the water.

Have you seen the latest Americas Cup contenders out on their foils - mind boggling!


Last edited by Arjay Bee; 08-13-2018 at 03:56 AM.
08-13-2018, 10:07 AM - 2 Likes   #60
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QuoteOriginally posted by dbs Quote
Hi Mark

Not being a engineering grad but just how is half a Tornado Catamaran your design ?

Interested thats all

My cousin put a 18 foot skiff rig on a 14 foot skiff it was quick

Dave
Taking a single Tornado hull, designing a framework to support it, support the hydrofoils and sail and rigging, not to mention designing and manufacturing the foils themselves kind of make it a new design, don't you think? And, as can be seen in the photos, the only significance of the hull is to provide a support for everything else when the boat isn't foil borne. Any hull would have done the same, but we had a Tornado at hand which cut the cost down significantly. The fact that it was a Tornado hull was irrelevant. In fact, a later iteration of the boat eliminated the hull altogether.


It's kind of like the Grumman X-29 Forward Swept Wing aircraft. It used the forebody from a Northrop F-5 and the engine and landing gear from an F-16. Still classified as a new aircraft, designed by Grumman. In general, if it doesn't look like the original design, it can be classified as a new design.


Since I designed the overall configuration and especially the hydrofoils, which are the most significant part of the design, I would classify it as my design. Feel free to disagree!

PS: I never said that I designed the Tornado hull, but that I designed this sailboat. There is a difference!

Last edited by subsea; 08-13-2018 at 10:30 AM.
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