Proa powerboat

tom28571 · Jul 22, 2015

Latest issue of PROBOAT has an article about the race Around Vancouver Island won by a multihull powerboat in a proa configuration. The port hull is of much narrower beam than the starboard one where the engine is located.

Does anyone here have experience with how the hydrodynamics of this system works?

Angélique · Jul 23, 2015

Don't know the one above, but here is another power proa . . .

More Than Jzerro

Russell Brown has posted a new (Sept. 2011) video to the PT Watercraft Channel on Youtube. It features some excellent sailing footage of Jzerro, as well as some running shots of a cool power proa that Russell designed for a friend to use as an aquatic pick up truck in the islands. The outrigger is powered by a 20hp outboard and goes about 18 knots!

Proa Jzerro Sept. 2011
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The power proa is from: 1 min. 21 sec. to 3 min. 24 sec. in the video.

Mr Efficiency · Jul 23, 2015

Has the Aspen Cat (proa) taken off ?

Angélique · Jul 23, 2015

Mr Efficiency said: ↑

Has the Aspen Cat (proa) taken off ?
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Yes, from the post #1 description it sounds like an Aspen . . :idea:

tom28571 said: ↑

. . . The port hull is of much narrower beam than the starboard one where the engine is located. . . .
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P.S. - From the above link...

[ . . . . ]
Larry Graf, founder of Glacier Bay Catamarans in 1987, founded Aspen Power Catamarans in 2008 when he developed a new revolutionary patented hull design (Power Proa) and drive system for power catamarans. The hulls, while identical in profile, are very different in plan view with one being 35% thinner. The non-symmetrical hulls are shaped to compensate for the offset thrust and torque, and since both forces are proportional to speed and thrust, the boat runs straight. Additionally, it has only one engine, shaft, prop, and keel reducing appendage drag 20%. The combination of new hull design and reduced appendage drag increases efficiency as much as 70% over mono hulls. In October 2014, the hull design was judged as the best multi hull in the world in the 30- to 39-foot category by the AIM Marine Group Editors.

[ . . . . ]
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tom28571 · Jul 23, 2015

Thanks Angélique , that is what I was looking for. The photo in Proboat looked like any other catamaran.

Angélique · Jul 28, 2015

Tribute has to go to Mr Efficiency who brought me on the trail of Aspen . .

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Proa powerboat

tom28571 Senior Member

Angélique aka Angel (only by name)

Mr Efficiency Senior Member

Angélique aka Angel (only by name)

tom28571 Senior Member

Angélique aka Angel (only by name)

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