Subject: Dennis O'Connor's new cat design (Michael Cannon)
To: power-catamaran-request@lists.samurai.com

Mike, thanks for the vote of confidence...  Otoh, you may not want to know more... In the exact words of my boat architect, "you make, ummm, interesting choices.", then he walked away mumbling to himself...

My boat is idiosyncratic and designed to exactly my preferences - mostly because no production boat even comes close...  I have babbled about this before but I'll make a short list here...
Bridge-Deck, Power Catamaran
Unsinkable, which means wood and foam, and flotation tanks in the hulls...
Displacement hulls, ~50' long with 12:1  ratio for efficiency...
No thruhull openings below the waterline....
Bridgedeck is about right for a 38 foot cat, sitting on ~50' hulls -  leaving the ends unburdened for handling in rough water..
Saloon, galley and berths, all on the bridge-deck, which results in a 26' beam...
Pilot house - single con station...
Economy cruise with a centerline diesel...
Two outboards for maneuvering...
No shorepower (  not even  a plug on the hull)
Form follows function - no eurocrap styling... <my son hates it, says it looks like a %^#*! tugboat... He is not paying the bills, so I get to have it my way! >

denny
Use Photomail to share photos without annoying attachments.
Use Photomail to share photos without annoying attachments.

Actually, I'd love to hear more about it.  Any drawings?

After hearing the discussions about hull efficiencies at >= 11:1 L/B ratios + the FPB project and others showing that one needs to think creatively about lifecycle costs, your approach of making a "38' boat" on 50' hulls certainly seems to make a lot of sense.  As others have pointed out, the systems and interior are a large factor of the expense, it should certainly be less expensive than a normally proportioned 50' design.

I'd also like to hear more about the centerline diesel.  I've often wondered if one could do a larger dia, lower rpm, single prop between the hulls would be only a modest or in fact a significant efficiency gain (not sure if that's what you are doing).  As a detail question, when using small outboards for menauvering on such a large boat, how do you get an appropriate prop on them to get some bit and not just slip like crazy?

Thanks!

Mark

Dennis OConnor ad4hk2004@yahoo.com wrote: Subject: Dennis O'Connor's new cat design (Michael Cannon)
To: power-catamaran-request@lists.samurai.com

Mike, thanks for the vote of confidence...  Otoh, you may not want to know more... In the exact words of my boat architect, "you make, ummm, interesting choices.", then he walked away mumbling to himself...

My boat is idiosyncratic and designed to exactly my preferences - mostly because no production boat even comes close...  I have babbled about this before but I'll make a short list here...
Bridge-Deck, Power Catamaran
Unsinkable, which means wood and foam, and flotation tanks in the hulls...
Displacement hulls, ~50' long with 12:1  ratio for efficiency...
No thruhull openings below the waterline....
Bridgedeck is about right for a 38 foot cat, sitting on ~50' hulls -  leaving the ends unburdened for handling in rough water..
Saloon, galley and berths, all on the bridge-deck, which results in a 26' beam...
Pilot house - single con station...
Economy cruise with a centerline diesel...
Two outboards for maneuvering...
No shorepower (  not even  a plug on the hull)
Form follows function - no eurocrap styling...

denny
Use Photomail to share photos without annoying attachments.
Use Photomail to share photos without annoying attachments.

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