Heh, heh... I was hoping you'd notice that... now we have something to talk about, see you in a few weeks. I will say that I agree with you in that PHRF ratings give an indication of a boat's performance... after all.. the ratings are based on race results.
In some cases I think comfort level in a boat is more important than the speed/sailing ability especially if one person has more fear with the heeling and such.
A person can go to the link......
http://www.image-ination.com/sailcalc.html
...where you can compare one boat against another and draw some general conclussion on the comfort thing. For instance lets take your Cat 27 (I'm not sure of the model) and put it against our Mac S. They are only 1 foot apart lengthwise, but much further apart in other respects.
They give your hull speed at 6.2 and ours at 6.5 (I question that as the PHRF of your boat is about 20 seconds faster than the Mac in the other chart). So they are close to the same with yours probably actually a little faster.
A big difference is in displacement to water line length 293 to 98. The Cat is a much heavier boat at 6439 lbs. than the Mac at a 2860 lb. even with the water ballast in place. That pays off big in the comfort and safety in big water. Maybe adding all of the weight we have with our mods might pay off there
.
It shows up in the capsize ratio where the Cat's is 1.87 to 2.24 for the Mac. I think they say for a boat to be an off-shore boat under 2.00 is preferable. So the Mac is or should be treated as a lake or coastal cruiser and your Cat is capable of being safer in worst conditions.
The weight difference (design difference) also shows up in the 'motion comfort rating' where the Cat's is 24.03 to 11.43 for the Mac with the higher number indicating a higher degree of comfort. This is my only concern with going out with you. Ruth might really like the difference in the feel of the larger boat even though it is only a foot longer :cry:. She already wants an Island Packet :cry:.
Here is also where the Mac X and Hunter 260 also shine some since they are heavier larger boats. On the motion comfort and capsize ratio the Mac comes in at 17.52 & 1.94 and the Hunter at 17.12 & 2.1. Pretty close to a dead heat.
I'll take our lighter more responsive Mac for the lakes and close in coastal, especially for shallow water areas like the Gulf and the Florida coasts and the Keys and your boat for deeper water and further off shore.
Just make sure you don't let Ruth like your boat too much
,
Sum
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