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T2 Portsmouth Yardstick
http://www.hobie.com/forums/viewtopic.php?f=127&t=49250		 Page 1 of 1
Author:  jackB [ Mon Sep 09, 2013 8:20 pm ]
Post subject:  T2 Portsmouth Yardstick
Just for fun -- let's speculate what is going to be T2 D-PN

See

http://offshore.ussailing.org/Portsmouth_Yardstick/Current_Tables/Multihull_Classes.htm

for comparison.
Author:  Africat [ Tue Sep 10, 2013 7:15 am ]
Post subject:  Re: T2 Portsmouth Yardstick
Here are some relevant points of reference, in order of increasing speed, i.e. going from slower (high D-PN) to faster (lower DP-N) at bottom. These are from the Portsmouth table linked above.

Hobie Wave = 92.1
Hobie 14 = 86.4
Hobie Getaway = 83.3
Nacra 500 = 76.4
Hobie 17 = 74
Hobie 16 = 76.0

My personal hope is that the T2 will have a D-PN in high 70s, or just below 80. This would be halfway between the H16 and Getaway. Given the T2's sail area to weight ratio of 172 sq ft/388 lbs (0.443), compared to 218 sq ft/320 lbs (0.618) for H16 and 180 sq ft/390 lbs (0.462) for Getaway, this may be a close call.
Author:  jackB [ Wed Sep 11, 2013 9:22 pm ]
Post subject:  Re: T2 Portsmouth Yardstick
Africat wrote:
My personal hope is that the T2 will have a D-PN in high 70s, or just below 80. This would be halfway between the H16 and Getaway. Given the T2's sail area to weight ratio of 172 sq ft/529 lbs (0.325), compared to 218 sq ft/320 lbs (0.618) for H16 and 180 sq ft/390 lbs (0.462) for Getaway, this may be a close call.


Agree. As it looks, most of the difference is in sail area between T2 and Getaway in jib size. Tatoo has main/jib sail area 140/32. I do not have main/jib area for Getaway, but just looking at the boat picture, jib is relatively large comparing to the main. This seems to be a trend in new cat design: small jib, bigger main, taller mast, and overall better performance as per total sail area. For example, Nacra 500 has main/jib area 152/38 (total 190) as compared with H16 153/55 (total 218). Both H16 and N500 have about the same D-PN.
Author:  hobie17li [ Sun Jan 05, 2014 9:07 am ]
Post subject:  Re: T2 Portsmouth Yardstick
the weight is 388lbs not 529lbs which is capacity
Author:  Africat [ Mon Feb 17, 2014 9:15 pm ]
Post subject:  Re: T2 Portsmouth Yardstick
hobie17li wrote:
the weight is 388lbs not 529lbs which is capacity


Thank you for catching that, hobie17li! That weight above 500 lbs should have made me suspicious. I went ahead and corrected the numbers in my post above.
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