Early Research on NA Sport Boat Section Splits

[Just Another Sailor]

Here are the results of my early reasrch regarding SP Section Splits
for upcoming regattas. This list includes designs that I am aware of
sailing in NA. I may have missed some, so please speak up!!! Several
ULDB designs I feel are questionable in my opionion and this needs to
be addressed.

Let's start hearing from everyone, ok.

Class 0

Azzura 310
B-32
Columbia 30 Sport Sailor
Farr 36 OD
Henderson 30
Hobie 33
KIWI 35
Melges 30
Melges 32-1
Melges 32-2
Moore 30
Thompson 30
Thompson 35
Thompson 850
Thompson 870

Class 1
BOAT
Antrim 27
B-25
Backman 21
Beneteau 25 PLATU
Blusail 24
Capri 235 Catalina
Carrera 280
Carrera 290
Cork 1720
Dibley 23
Elliott 770
Hobie Magic 25
Hotfoot 20
Hotfoot 24
J 80
JS9000
Martin 24-3
Melges 24
Moore 30
Phuket Sports 8
Rocket 22
Rocket 22 (2004)
Sierra 26
SR 21
SR 25
SR 27
Thompson 590
Thompson 650
Thompson 750
Thompson 830
Ultimate 20
Ultimate 24
Viper 640
Viper 830
Wabbit 24

[Christian]

Why don't you publish the spreadsheet you have with boat data - would
be very helpful for this exercise!

I would think you would want 3 divisions ideally. In PHRF speak I
would think up to 70, 71- 110, 111 and up in PHRF speak.

Some comments on boats in the list:

Viper 830 move to class 0 (PHRF rating 63 - on par with T870)
B32 a sportsboat?
Hobie 33 a SB?
B25 not a SB (SA/D 25)
Bendytoy25 not a SB
Capri 235 not a SB
J80 Not a SB (SA/D 27)
SR21,25,27 SB??

[Just Another Sailor]

Rating are just part of the equation, displ/LWL is a more telling
feature of the similar sailing charatistics.

To have section splits you need competitors, if we can actually get 20
boats for 2 sections ot start that would be super, you would need 30
for 3 sections, where was the last time you saw 30 SP at a single event?

[eri...@gmail.com]

How is the Capri 23.5 not a sport boat? I think you are confused with
another boat.......

[Just Another Sailor]

The discussion regarding what makes a sport boat is just starting... In
today's world there really are two distinct types of SP. The eariler
Displ type and the newer higher performance style. Your 23.5 does
qualify in my opionion.

[Christian]

My bad - was thinking about another boat

[michael-compwest]

In using various ratios to help determine the Sboat reletivity
index,,,methinks the ballast/disp ratio only gives 1/2 the story.--It'd
be useful to relate the SailArea/disp(SAD) #'s just as
much!!--basically a power/weight ratio in addition to a righting moment
criteria.

.....CHOICE OF RULES....On these --weight sensitive boats......does ANY
measurement rule take into account the actual sailing displacement,,and
righting moment of a --sailing weight',with crew on???.......
.........................I'm not a designer,,but imho,,these
considerations would seem CRUCIAL in accomodating a wide range of
boats---------otherwise,go KISS,,,and start with PHRF,,which would
probably the easiest for event organizers to accomodate!

[michael-compwest]

oh,yeh,,,would many designs be excluded if a
lifting-keel,ramp-launchable aspect was added to the definition??

[Just Another Sailor]

I can only think of three,

Thompson 35
Diode 36
Farr 36

[gybeset]

and Cork 1720 has a 'removable' fixed keel, I think gets trailered in a
'high' keel on position.

JAS do you know of any owners of these big (not the cork)boats that
wanna play ?

[Just Another Sailor]

I haven't spoke w/ anyof them as of yet. If the big boats opt out then
we will definitly simplify our class, all smaller and light!

[Cork1720USA]

Gybeset is right about the Cork 1720. It is trailerable but it is high
with the keel on. The total towing weight is easily handled by most
SUVs or small trucks. It is not ramp launchable though, you must use a
hoist.

[Just Another Sailor]

I don't understand the need for making the rule exclude non ramp
launchable designs. There are better ways to limiting the design
chartaristics of these boats.

Making non-overlapping jibs & ass spins would make the designs sail
simular in a wide range of conditions.

It is also my vote for the executive committe to vote on which designs
fit within our rules.
Mumm 30 out unless sailed w/ Ass spin as an example.

[michael-compwest]

--I guess I'm too much of a dinghy-sailor/anarchist!!!---I like the
idea of developing some of our own events where all we need is a launch
ramp!!,,and that can also be a good selling point for event hosts
,too!!
........fixed keels just seem too 'yachtie' for me!--and just like the
'trailer-sailer' aspect of what the Sboat definition might be,,,as in
too big for a dinghy,,too small for a yacht.

[Just Another Sailor]

Totally agree, however there are barely enough Sp in NA to start trying
to weed some of them out. All we need is good section breaks to develop
good racing. We need big events as our drawing card to get the
available SP to go to onlty seclected big regional events. As more
sailors see how much fum we're having we will grow!

[Cork1720USA]

I agree with Just another sailor "there are barely enough Sp in NA to
start trying to weed some of them out". But if you are going to start
somewhere why the keel? Are we going to restrict this to retractable
keels only? What about canting keels? The Cork1720 with its fixed
keel draws less water than many of the other retractable keels out
there. Where are you going to race, where there are only ramps? fresh
water lakes? I would bet anywhere you are limited by a ramp you would
be limited by water depth as well. This group is supposed to help boats
not established in OD yet race competitively with other similar boats.

[michael-compwest]

you guys are totally.........RIGHT!!,,,,,this issue can be addressed
later when different divisions are set-up!