Gareth,
They say about me, “He knows not of what he speaks.”
I have almost no experience sailing either the 30 or the 33. May three to 5 hours on each. So excursive caution when considering my thoughts.
Below you will find the numbers for the Nonsuch 30 and 33 from the Tom Dove Sail Performance Calculator . sailcalc.html sailcalc.html
As you can see the 33 actually has a marginally higher sail area to displacement ration 17.33 vs 16.96. It has a slightly finer hull, higher hull speed, better capsize ratio, better motion comfort and carries about 200 pounds more for each inch of immersion. Based on my own calculations the 33 has a marginally better ballast to displacement ratio - 39.41 vs 39.13. The sail aspect ratio also favours the 33 - 1.91 vs 1.875. Essentially on all of the performance measures the 33 is better than the 30.
Generally bigger boats handle bigger waves and winds better than smaller boats. Of course that comes at a cost. Everything for a 33 is more expensive than 30. All the lines are longer and bigger. Moorage costs more. Sails cost more. It takes way more time and energy to polish the hull of a big boat than a smaller boat. I have compounded, polished and waxed the hulls of a Nonsuch 26, a C&C 30 and a C&C 34. The 26 took less time and I could use a lower scaffold.
All Nonsuches are easy to sail and the principles are the same but the smaller the boat the handier it is. The forces on the sail on my 26 are much smaller than on a 30 or 33. Pushing the 26 around at the dock is easier than pushing a 33.
It is easier finding both permanent and temporary moorage for a smaller boat. When we are out cruising and call a marina looking for a spot for the night we are often told the marina is full. Then they will ask how big are you? We say 26 feet and they say oh, we can fit you in.
How much room you need for two people is a personal thing. We have had 4 people aboard for two weeks. At the end of that time the 26 started to feel small. For two of us for 3 weeks it is fine. I know of one couple that sail their 26 for several months at a time in the summer and feel the boat is plenty big enough. I also have friends that had a 48 foot power cruiser that they cruised with just the two of them aboard but were looking for something with more room.
The rational side of me says the 26 is big enough and anything more will be too expensive, while the emotional side of me lusts after a 30 or 33.
Mark Powers
Performance Comparison
LOA feet
Nonsuch 33 33.5
Nonsuch 30 30.33
LWL feet
Nonsuch 33 31.5
Nonsuch 30 28.75
Beam feet
Nonsuch 33 12.6
Nonsuch 30 11.83
Displacement pounds
Nonsuch 33 15350
Nonsuch 30 11500
Sail Area square feet
Nonsuch 33 669
Nonsuch 30 540
Capsize Ratio
Nonsuch 33 2.03
Nonsuch 30 2.1
Hull Speed in nautical miles per hour
Nonsuch 33 7.52
Nonsuch 30 7.18
Sail Area to Displacement
Nonsuch 33 17.33
Nonsuch 30 16.96
Displacement to LWL
Nonsuch 33 219
Nonsuch 30 216
LWL to Beam
Nonsuch 33 2.5
Nonsuch 30 2.43
Motion Comfort
Nonsuch 33 25.09
Nonsuch 30 22.46
Pounds for each inch of immersion
Nonsuch 33 1418
Nonsuch 30 1215