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Recommended PHRF Sailboat Handicap Ratings For J/Boats

February 3, 2009

To: PHRF Handicappers

From: Rod Johnstone, Designer

Subject: Recommended PHRF Sailboat Handicap Ratings for J/Boats in 2009

The relative speed of various models of J/Boats in seconds per nautical mile is listed below. The table shows relative predicted speed of each model compared to one of five “control” J Boats, each in a different speed range, whose actual performance has become widely known in many PHRF areas over many years. The five “control” J Boats used in this comparison are the J/44, J/35, J/29 (Masthead outboard), J/30 and J/24. Assumptions are that:

1. Except where noted as “One Design”, each model conforms to all local PHRF definitions of an unmodified “base boat” with a base 150 to155% genoa (depending on local regulations).

2. Maximum spinnaker size (without penalty) conforms to local PHRF regulations defining base spinnaker size, except where One Design definition of spinnaker size accompanies the speed prediction shown in the table below.

3. Wind strength averaging ten knots is used to predict relative speed. Because most J Boats have similar characteristics in different wind strengths, this is a valid way to predict speed differences versus one of the five “control” boats over a wide wind range.

4. NEW for 2009. PHRF numbers are recommended for each boat relative to the “Control” boat listed, based on two separate types of courses.

The first type of course can best be called “buoy racing” around government marks with a mix of beating, reaching and running – not always evenly mixed or even predictable from race to race.

The second type of course is Windward/leeward –usually fairly short courses around portable set marks, because most high-profile PHRF racing occurs on this type of course. Relatively heavier cruising J designs with smaller draft/displacement ratio perform poorly on such courses. Likewise, designs which fly only Asymmetric spinnakers tacked to the centerline are at a slight disadvantage downwind against boats with symmetric spinnakers flown from poles- both speed wise and tactically. If courses used for racing are strictly windward-leeward, then base PHRF handicap numbers recommended for that type of course should be used.

5. Crew Weight: Our rating recommendations for PHRF numbers for J Boat models designated as One Design do not include crew weight limits. It is assumed that PHRF crew weight limits, if any, shall apply equally to all types of boats racing in a given PHRF area, and that One design designation only applies to the boat, rig and sails. Therefore One Design Class Rules regarding crew weight should not apply when racing PHRF if these rating recommendations are used.

PHRF ratings of the five “control” J/Boats may vary somewhat from one PHRF area to another. The PHRF numbers shown are what seem to be typical for these five boats nationally. If the PHRF number shown here is different for the applicable “control” boat in your area, apply the difference to the relative rating of the J/Boat you are handicapping. For instance, if the J/35 rates 66 in your area rather than 72, as shown on the attached table, the number for the J/Boat you are rating would be six s/m less than what is shown.

Please direct questions, input, or comment on these suggested relative J Boat ratings to me at rodj@jboats.com, or tel. 860-535-3480.

Rod Johnstone

2009 PHRF Ratings for all J/Boat Models

Assumes average wind speed of 8 to 12 knots. Maximum genoa and spinnaker size conforms with PHRF norms, except where shown below. Ratings valid relative to Control Boat listed. Crew weight maximums according to local PHRF regulations. Sprits all non-articulating.

				Buoy Racing	Set Marks
Boat Model	Rig & Configuration	Control Boat	Special Notes	Triangular	WWD/LWD
				Rating	Rating
J/145	Carbon rig	J44	8.5' sprit, rf, 256 sqm Asail	-18	-15
J/125	Carbon rig	J44	8.5' sprit, rf, 175 sqm Asail	-3	0
J/160	Deep Draft, carbon rig	J44	7.0' sprit, rf, 265 sqm Asail	-3	3
J/160	7' draft, carbon rig	J44	7.0' sprit, rf, 265 sqm Asail	3	12
J/133	Standard	J44	6.75' sprit, rf, 186 sqm Asail	18	24
J/130	Carbon rig	J44	7.0' sprit, rf, 200 sqm Asail	21	24
J/130	6'9" draft, carbon rig	J44	7.0' sprit, rf, 200 sqm Asail	27	33
J/44	One Design	CONTROL		27	27
J/122	Carbon rig	J44	7.0' sprit, rf, 155 sqm Asail	30	33
J/124	7' draft, carbon rig	J44	No sprit, rf, 120 sqm Asail	36	39
J/44	6.5' shoal draft	J44	UFO keel	36	42
J/46	7.6' draft	J44	No sprit, rf, 170 sqm Asail	33	39
J/46	6.0' shoal draft	J44	No sprit, rf, 170 sqm Asail	48	54
J/90	Carbon rig	J35	7.3' sprit, 112 sqm Asail	51	51
J/39	Aluminum rig	J35		51	51
J/120	Carbon rig	J35	7.0' sprit, rf, 165 sqm Asail	51	54
J/120	5.75' shoal draft	J35	7.0' sprit, rf, 165 sqm Asail	57	63
J/41 IOR	Aluminum rig	J35	various rig config, forward lead removed	66	66
J/37	Standard Draft, aluminum rig	J35		69	69
J/37	5.2' shoal draft	J35	UFO keel	84	90
J/109	PHRF base, aluminum rig	J35	5.5' sprit, rf, 155% genoa,121 sqm Asail	69	72
J/35	One Design	CONTROL		72	72
J/109	One Design, aluminum rig	J35	5.5' sprit, rf, 108 sqm Asail	78	81
J/42	6.5' draft, carbon rig	J35	No sprit, rf, 140 sqm Asail off bow	81	87
J/42	5.4' draft	J35	No sprit, rf, 140 sqm Asail off bow	90	96
J/105	PHRF base, aluminum rig	J35	5.5' sprit, rf, 89 sqm Asail	81	87
J/105	One Design	J35	100% jib, 5.5' sprit, 89 sqm Asail	90	96
J/100	PHRF base, carbon rig	J35	No sprit, rf, 80 sqm Asail off bow	81	87
J/100	One Design, carbon rig	J35	100% jib, rf, 80 sqm Asail off bow	90	96
J/105	Shoal Draft	*******	Add 6 sec/mile to any of J105 standard versions	**
J/40	6.5' draft, aluminum rig	J35		84	90
J/40	5.4' draft	J35	UFO keel	93	99
J/33	One Design	J35		81	81
J/36	One Design	J35		81	84
J/110	6.0' draft carbon rig	J35	5.5' sprit, rf, 140 sqm Asail	93	99
J/35c	6.5' draft aluminum rig	J35		96	96
J/92s	One Design, aluminum rig	J29MO	5.5' sprit, rf, 85 sqm Asail	99	102
J/92	PHRF Base, aluminum rig	J29MO	5.5' sprit, rf, 91 sqm Asail	105	108
J/29 m/o	One Design	CONTROL	Masthead, outboard version	111	111
J29 f/o	One Design	J29MO	Fractional outb'd, 12.5' SPL, 163% genoa	114	114
J29 f/o	PHRF Base	J29MO	Fractional outb'd, 11.5' SPL,	120	120
J29	Inboard Versions		Add 6 s/m to equivalent outboard version
J34c	5.4' draft, aluminum rig	J29MO	UFO keel	114	120
J34 IOR	3/4 tonner, aluminum rig	J29MO	Inside IOR lead forward of bkhd removed	114	114
J/80	PHRF base, aluminum rig	J29MO	6.5' sprit, rf, 65 sqm Asail	114	117
J/80	One Design, aluminum rig	J29MO	6.5' sprit, rf, 65 sqm Asail	120	123
J/27	One Design, aluminum rig	J29MO		120	120
J/32	6.0' draft, aluminum rig	J30OD	No Sprit, rf, 70 sqm Asail	126	132
J/32	4.75' draft	J30OD	No Sprit, rf, 70 sqm Asail	132	138
J/30	One Design	CONTROL	163% genoa, 12.5' Pole, 22.5' SMW	138	138
J/30	PHRF Base	J30OD	11.5' pole	144	144
J/28	5.0' draft, aluminum rig	J24OD		171	177
J/24	One Design	CONTROL		171	171
J/22	PHRF Base	J24OD	9.0' SPL	177	177
J/22	One Design	J24OD	9.0' SPL, class jib	183	183