Sailing Performance

  I thought I would put up a little comparison between my boat and the J-42, the J-133, and the Morris M42. None of the three had the separate engine compartment that I required and would not compromise on, so for that reason I would chose my boat over the other three.


I like the J-42 very much. It just lacked some essential features I wanted. It was more long term crusier than daysailor for what I wanted. I don’t see the need for two heads on a daysailor or single hander. I would rather use that space and money for something else. A very nice looking and great sailing boat, from what I have heard.

Morris M42

 This is another beautiful yacht. It was very close to what I wanted, and the quality is impeccable. It was a little more of daysailor than “dock cruiser”. I thought my boat needed a little more interior. I want to be able to spend a lot of time on my boat. Also, I don’t think I would be willing to provide the maintenance that would be required for all that teak on deck. I want to sail my boat, not work on it. So there will be no teak on deck on LUCKY GIRL. Everything on the outside of the boat is stainless steel, aluminum, or glass and epoxy.


The J-133 might be the closest boat to what Bob and I have designed. It is a much faster boat than LUCKY GIRL, but then again it has less weight and a huge rig. I would a little concerned that I could handle such a large rig when I get older  [SA/D of 23, compared to my boat at 19.2 when loaded with fuel and water and some food and passengers]. Also, my boat has a more user friendly cockpit. The J-133 rates PHRF at 15, so it is one hell of a fast boat.

 In designing the hull Bob and I were very concerned with performance. I really want  a fast boat. I think the closest sailboats to my boat in design and conception would be a J-42 or a Morris M42 .  The J-133 is more of a racer than I want. The three boats are very similar; I like the M-42 and J-42 very much, and they were one of the benchmarks I used in designing my boat. My boat is more of a cruiser than the Morris and more of a daysailor than the J-42. So you can think of my boat as splitting difference between the two.  The Morris M-42 has a PHRF of about 95, and the  J-42 has a PHRF rating of about 70-80; the J-133 rates about 15-20the  so LUCKY GIRL should rate 55-60, and maybe  faster. We have deeper draft, longer waterline, less beam, more ballast, a taller rig and more sail area. The interesting difference might be in the loss of sail trim because of the in boom roller furling and the efficiency of the foils.

LUCKY GIRL            J-42                  Morris M42             J-133

LOA  43.56′             LOA 42′              LOA 42.25′              43.00′

LWL  36.67            LWL 35.10′          LWL 30.0                37.80′

BEAM 12′              BEAM 12.20′        BEAM 11.25             12.78′

D/LWL  170          D/LWL  203       D/LWL 269               145

DSPL. 18,888#     D.  19,700#        D. 16279#                 D. 17.900#

BALLAST 8888#     B. 7,000#     B.6235#                     B.7300#

B/DISPL  47%         B/D  37.8%       B/D 38.3%             B/D 40.8%

DRAFT     7.9′        DRAFT 6.6′         DRAFT 6.9′         DRAFT 7.5′

SAIL AREA 888      SA 790                SA 759                 SA 964

SA/D     20.0       SA/D  17.4          SA/D   18.98         SA/D  23

I    50.75′                     I  50.5′                       I 44.83                I 57′

J   15.92′                     J  14.70′                     J 14.92                J 17.25′

P  53.0′                        P  46.50′                   P 48.67′              P 54′

E 18.33′                      E  18.00′                   E 17.50′                 E 18.60′

Estimated Performance VPP Polar Diagram

The wind speeds are 6kts, 8kts, 12kts, 14kts, 16kts, and 20kts.

The polar plots show the boat reaching with main and 110 jib at about 6.5 knots in 6 knots of wind, and 8 knots in 10 knots of wind,  which is about hull speed.

They also show the boat speed at 9.5 knots in 20 knots of wind with just main and working jib at 90 TWA. The boat is a little faster with a spinnaker at higher wind angles.

cooper 1-26-15 polar plot




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