I want to do a sanity check on this containerizable boat I am "designing". The stats on it are fairly close to the latest iteration of Harry (Aroha?) I think, but enough different that they probably don't apply directly. To get a feel for this, I compare it to the Maine Cat 30 I lived and cruised on for a year:

                             Harryproa     Maine Cat

LW:                        39 feet            29 feet

WW:                       26 feet            29 feet

Weight:                   2000 lbs        4500 lbs

FULL displacement: 4000 lbs        6500 lbs

Total sail area:           480 sq ft      500 sq ft (725 w/screacher, 10-12 kt max winds)

Beam:                      16 ft              18 ft

Bunks:              1 dbl, 2 single      2 dbl, 1 single

Cost:                       $50K             $200K

When I look at these numbers, it seem to me that in less than 10-12 kts of wind, the boats will perform similarly. I would hit 8-9 knots under the screacher, and about the same without in 20 kts of wind, when I had to reef.

The times that I might do significantly better are the 15-20 knot wind range, provided that I have enough righting moment to hold off on reefing. I can figure the righting moment with weights from my design, but how do I calculate the heeling force from 2 schooner rigged unstayed masts of with sails 240 sq ft each?

I could match the screacher based sail area if I had telescoping masts, or if I had a double ballestron rig. Any feedback on those two choices?

It would also help if I could reduce the weight, but with 500 lbs of crew, and 300 lbs for a dinghy w/outboard, I already have 800 lbs without food, fuel or water, so I don't think I would get significantly below 1500 pounds, so I figured I would compare to the really bloated weight when we lived aboard.

Obviously, the last line of the comparison is where the ENORMOUS advanatage of the harryproa shows off. Even if I only get the same peformance, I have saved 75% of the cost!! But, still, I want to sail FASTER!

Thanks, as always, for your comments,

- Gardner Pomper

York, PA

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