Dual Masted Cat - What is it?

[grantmc]

This sail boat was seen recently near Busselton (south of Perth, Western Australia).

She has a mast on each hull.

Anyone able to identify the make/model and origin perhaps even give some background?

Is this the future of catamarans?

(Please do NOT identify the yacht itself or in any way breach their privacy.)

[Lee Jerry]

I don't know about that boat, but the concept is not new. For example, this one was built over a decade ago.

[cal40john]

Surprising, at least to me, that the separation of masts has to be far apart to not give each other bad air. The Team Phillips boat for The Race in 2000 apparently was big and wide enough to work, but the hulls weren't up to the loads and it broke apart.

https://petegoss.com/pages/journey-t...eam-philips/13

[catsketcher]

I was talking to a really nice guy who designs lovely fast cats - he built a 47ft dual masted cat for himself. It's a great boat that has done serious voyaging - from Australia - into the wind to get to Tahiti in a couple of months. Then back again.

He avoids the apparent wind zone where the leeward sails gets blanketed by the windward ones. His boat is wide but you still can't get away from interference issues - just work with them.

cheers

Phil

[Factor]

Scanning did some including this design

Schionning Radical Bay

[Benz]

There was a carbon one built around here recently called "Saphira"
I did some work on the rigging, and watched some of the hull construction. It had freestanding rotating masts, and once the bugs were worked out, was apparently quite fast.

[PippaB]

Guessing the OP is a Moxley (this one is without cabin, but the cabin on others looks similar to the OP, and the rig looks identical):


Chris White played around with various two mast options for a long time:

[Tupaia]

For more stuff on bi-rigs this was discussed here a few years ago.
https://www.cruisersforum.com/forums...rs-267015.html

[Nowhere-Bound]

There’s a fascinating vid of Chris White interviewing the owners of the Atlantic 70F MastFoil Cat "Saphira" on the boat’s overall design and their experience sailing her.



You can find it here: https://www.chriswhitedesigns.com/br...amaran-saphira


What’s not to like about averaging 265 nautical miles a day over six seasons of cruising!

[barnakiel]

Have see a proto of this style in RSA. there was some problem the proto was ashore for mods.


b.

[cjheath]

I reckon i know this guy. I worked with him on a shutdown project about 18 months ago in the north of WA (that's Western Australia not Washington!) I believe he took over the restoration project from his father. he was working as a rigger/scaffolder but his other trade is as a stone mason. Now he can add catamaran re-builder to his CV! It's an interesting rig for sure. The strut (spar?) between the mast tops i believe is unique to this kind of cat. It would be interesting to see it run down wind with both sails goose-winged.

[Lee Jerry]

I can't believe I forgot about the Hobie (Ketterman) Trifoiler. This had to be early 90s IIRC.

[Tupaia]

Originally Posted by cjheath

The strut (spar?) between the mast tops i believe is unique to this kind of cat. It would be interesting to see it run down wind with both sails goose-winged.

Derek Kelsall wrote an article about adding a strut between mast tops it apparently reduces the required weight of each mast considerably. If I remember he also used cross wires below the strut between the masts that together with the strut would ass to the lateral stability of the rig. So it is not unique. Can't find the article.

[CaptainRivet]

Originally Posted by Nowhere-Bound

There’s a fascinating vid of Chris White interviewing the owners of the Atlantic 70F MastFoil Cat "Saphira" on the boat’s overall design and their experience sailing her.



You can find it here: https://www.chriswhitedesigns.com/br...amaran-saphira


What’s not to like about averaging 265 nautical miles a day over six seasons of cruising!

Well a 70ft performance that's normal numbers doing 265nm etamals also with a single mast config, nothing exceptional in relation to length but yes all above 240nm is great.

[Flobble]

We saw MangeNuage a couple of weeks ago near Marseille: https://www.multihulls-world.com/new...rcus-catamaran