60'+ or - 20' Ocean Racing Monofoiler Design Discussion

Your problem is you have no idea what "in development" actually means.

 

Doug, I know of one such monofoiler development and that was done by Simon Hull and his father, who is/was a aerodynamicist; Simon is the far sighted bloke who bought the ORMA Geant, now named G3, which is killing everything in sight here, anyway they had a superb Murray Ross designed 44 foot yacht named M1 (people say it was very influenced by Jim Young, but that is by the way, and will piss Murray off) anyway the team put quite large angled foils at waterline, angled down, through the hull and they could be slid in and out; the bulb keel weight was drastically reduced so the changes were radical. This horrified many here because they thought the Hulls were screwing up a great boat. We sailed close to them one day in G. Marx when M1 was crossing the harbour and the boat was looking pretty good but the Hulls, after much perseverance and alterations, breakages and expense, eventually threw in the towel and reverted M1 back to original - to the relief of the experts on the river bank. There maybe some people out there with more detailed information on this boat - and the above is from just stuff I heard, and the fact that Jacques (who was very impressed) and I saw it actually functioning.

 

60' Moth

Thanks for that Gary-I'll see if I can find out more.

 

"In development" could mean just about anything. Perhaps it would be fair to hold-off with any suggestions as to viability until they have their boats actually "In Build"?

If you don't mind sharing... Where are the DSS boats being built and by whom? From my several minutes spent wandering about the DSS website, it doesn't look like anything has been going-on there since May of 2008. I think that I'm kinda slow, sometimes, to post active stuff on my website... but 2 years?

How is the 60' Moth being developed and by whom? Is there any kind of tentative schedule as to the next milestone in the process?

I'm genuinely curious about all this stuff, so any solid bits you can shuffle along would be appreciated.

 

60' Moth / DSS

2010 DSS racer/cruiser-one of the first foil assisted keelboats in history:

Key features of the JK50DSS are:
- The innovative Dynamic Stability Systems; DSS is the revolutionary patented sliding foil which increases stability, speed and comfort without compromising safety.
- A design emphasised towards practical fast offshore sailing in comfort whilst maintaining an ability to be competitive in IRC.
- Fully customisable interior based around either a raised deck saloon or a more conventional interior layout.

The JK50DSS is built in accordance with European Recreational Craft Directive and is certified for Category A – “Ocean” use.

For further information on the JK50DSS and to discuss specific requirements please contact info@jkyachts.com
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Vessel Type: JK50DSS
Builder: JKyachts.com
Model: JK50DSS
Designer: Hugh Welbourn
Year: 2010
Length Overall: 50'
Waterline Length: 14.4m
Beam: 4.6m
Draft: 2.8m
Engine(s): 1 x Diesel
Hull Type: Planing
Hull Material: Foam Core Epoxy
Displacement: 10 metric tons

Status: Available
Location: Cornwall UK

http://www.apolloduck.com/display.phtml?aid=135241

Contact: James Kemp [Send Enquiry]
Telephone: +447868025308
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http://jkyachts.com/

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If you go to the JK Yachts website, an interesting thing doesn't show-up anywhere as you scan through all the pages available....

There's not one single image, rendering or photograph, illustrating the DSS foil in their presentation materials for the 50 foot boat that is their one and only product.

One can only sit back and go, hmmmmmmmm?

 

Not to mention the last update was 6 months ago. Seems maybe this is a project that might not have gone forward?

 

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As I clearly pointed out, the Whitehouse/Richards project uses foil assist-in a very similar manner to an I-14 . Not only that but their 100+ degree canting system is similar to that on the 60' Moth.

 

You are a funny man.

I'm sure you have not considered this, but maybe you should:

EVERY keelboat that is sailing with some heel angle is "foil assisted", if someone wanted to make that claim.

Do the vector analysis, if you can.

 

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That comment has absolutely nothing to do with the technology being used on the Whitehouse/Richards project. Like the I-14, it is designed to sail flat and in so doing the rudder hydrofoil(as shown in the picture) can lift vertically up or down as it is set by the crew. On the I-14, the rudder foil is set to lift vertically upwind so the crew can move aft and it is set to lift vertically down off the wind as necessary for pitch control.
(click on image)

 

Jeepers, thanks for the education on I14s.

Considering I've been a class member, owned a 14 myself, done design work on a 14, and attended a recent Worlds, I guess I still need you to educate me on 14s.

What would we do without you?

 

Having raced against a boat with a DSS system fitted it is not that impressive at all, in fact it looked like it caused a couple of pretty impressive wipeouts, we were on a 6.5m sport boat and the DSS boat was a 30’ keel boat, a relatively light weight fast design at that. During the regatta they were never close to us.

 

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Do you know any specifics about the boat? How does a DSS system cause a wipeout?

 

Not enough to give it a fair hearing so to speak, it may well have been a new crew for all I know. It looked like when the boat rounded up in a gust it pulled the whole thing sideways with the rudder out of the water, not a very good look or fast for that matter. Its one of those things that looks like it might work in theory but doesnt seem to work well in practice

 

Perfect - lets bolt it on to the aerofoiler(TM).