hpr concept presented to the yacht racing design & technology symposium december 13, 2011...
TRANSCRIPT
HPR CONCEPT
Presented to the Yacht Racing Design & Technology Symposium
December 13, 2011
PROPRIETARY & CONFINDENTIAL
HIGH PERFORMANCE RULE
organization
HPR Technical Committee:
Steve Benjamin Secretary
Sailmaker-North Sails USA 5x Admirals Cup Helmsman 1984 470 Olympic Medalist
William Tripp
Designer-Tripp Design
Bill Lee
Designer of the Santa Cruz 27, 33, 40, 50, 52, 70 and Merlin Member Transpac Tech Comm. Chair of original TP 52 Tech Comm.
Stan Honey
Rolex Yachtsman of the Year
Shaun Carkeek
Designer-Carkeek Partners Multiple World Champions-IMS,
TP 52, GP 42
Mark Mills
Designer-Mills Design
HIGH PERFORMANCE RULE
CONCEPT
• HPR is not intended to displace any other rating rule.
• The purpose of HPR is to get more owners and crews enjoying performance sailing.
• HPR is a performance oriented, type forming, continuum box rule. • HPR is international, permitting boats from many countries to race in high level
events.
• HPR is a fixed and published formula rule - designers can directly calculate unlimited HPR rating trials utilizing the HPR Excel spreadsheet.
• HPR will yield a rating in linear meters which is then converted to Time-on-Time (TOT) handicaps.
• HPR utilizes elements and concepts from several fixed formula rules.
• HPR will modernize with the times.
HIGH PERFORMANCE RULE
rules pyramid
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purposes & goals
• To get more people sailing, more owners building new yachts, and more existing yachts racing.
• To create more excitement in the sport of sailboat racing.
• To create a rule of sufficient quality that the owners elevate it to high performance status for use worldwide.
• To encourage racing in good fast yachts that are fun to sail, safe, and competitive for many years, including new builds and existing yachts.
• To be as inclusive as possible of the existing fleet and yet encourage new builds.
• To create a forum where teams can compete at sailing as well as design and optimization. This requires a published and objective rule.
• To be fully compliant with the UMF (Universal Measurement Form).
HIGH PERFORMANCE RULE
universal measurement form
US Sailing, RORC, and ORC are jointly developing a “Universal Measurement Form” (UMF) which includes all measurements required by IRC, ORR, ORC and PHRF. Other rules are encouraged to participate.
The intent of the UMF is that once measured, a boat’s rating can be calculated under any participating rule. Eventually all UMF measured new boats may be supplied with the completed digital UMF.
While some have hoped for “One World, One Rule” the UMF is vastly more practical and will permit each rule to better serve its installed base. HPR’s philosophy is “The Right Rule for the Right Job.”
HPR is very supportive of the UMF effort. It will be a participant and will only use measurements that appear on the UMF.
HIGH PERFORMANCE RULE
TABLE OF RATING RULES
Summary of factors and key items in various rules - 1
Factors Universal CCA PHRF IOR IMS/ORC CHS/IRC IRM TP 52 ORR HPR
First Year 1920 1950s Late 40's 1970 1980 ? ? 2000 2001 2005 2012
Last Year 1937 1970 Continuing 1995 Continuing Continuing ? Continuing Continuing n/a
Length Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes
Beam ? Yes Yes Yes Yes Yes Yes Yes Yes Yes
Freeboard ? Yes No Yes Yes Yes Yes Yes Yes Yes
Draft Maximum Yes Yes Yes Yes Yes Yes Yes Yes Yes
Displacement Calculate Weigh Yes Calculate Calculate Weigh Weigh Weigh Weigh
Calculate Weigh
Sail Area Formula Formula Yes Formula Coefficient Formula Formula Formula Coefficient Formula
Vertical center of Gravity No Yes No Yes Yes No Yes Yes Yes Yes
Propeller No Yes Yes Yes Yes Yes Yes Yes Yes Yes
Age No No No Yes Yes Yes Yes Yes Yes Yes
Crew Weight No No No Yes Yes Yes Yes Yes Yes Yes
Const Matl and/or Cost Scantlings No No Yes Yes Yes Yes Yes Yes Yes
2nd Righting Moment factor No No No No No No Yes No No No
Movable Ballast No No Yes No Yes Yes No No Yes No
Mast Robust Factor Min wt. No No ? Yes Yes Yes Yes Yes Yes
HIGH PERFORMANCE RULE
TABLE OF RATING RULES
Summary of factors and key items in various rules - 2
Factors Universal CCA PHRF IOR IMS/ORC CHS/IRC IRM TP 52 ORR HPR
Measure LWL Yes Yes Owner Dec No Indirectly Yes Not sure No Indirectly No
Owner Declared Data No No Yes No Some Some No No Minimum No
Published Yes Yes Yes Yes Yes Confidential Yes Yes Confidential Yes
Arithmetic to combine factors Multiply Add / Mult Obser Perf Add / Mult VPP Confidential All multiply None VPP All Multiply
Output Linear Linear Sec/Mile Linear Sec/Mile TOT TOT Level Sec/Mile Linear
Single processing center req'd No No No Yes Yes No
Can designers calculate trials Yes Yes No Yes Yes No Yes Yes No Yes
specifications
Required
• ISO 12215 Compliant
• GL Plan Approval
• ORC Cat 1 & Cat 2 Compliant-As per event requirements
• RRS 51 Compliant, no moveable ballast
Under discussion
• Asymmetrical spinnakers with less than 75% mid girth.
• Cockpit volume requirements
• Forestay adjustable
• Mast jack adjustable
HIGH PERFORMANCE RULE
Development Rule
Development rules by their nature give a very slight but real edge to the latest design technology as an incentive for owners, designers, and builders to create faster and faster boats to the rule.
Development rules, while they have an objective to protect the bulk of the fleet they create, cannot on an ongoing basis, protect boats that are not up to speed.
HPR is NOT a general purpose rule. General purpose rules attempt to rate a wide range of boats, both existing and new, both racers and cruiser/racers, and with wide variation in type and age.
HIGH PERFORMANCE RULE
HPR Target TYPE form
The HPR type form is intended to include features from TP 52s, modern IRC racing boats, and the kind of well proportioned racing boat that a designer might design in the absence of rating rules.
HPR type form:
• Displacement only sufficient to provide righting moment
• Swept back spreader rigs
• Square top mainsails
• Split topmast runners
• Non-overlapping and fractional jibs
• Masthead asym spinnakers tacked to centerline sprits
HIGH PERFORMANCE RULE
Existing yachts
To do the best job for boats that have not been built as yet, the core of HPR is centered on the new boat target type form.
While HPR will provide for existing boats, it will not offer Cruiser/Racer credits, nor will it provide full rating credit for “go slow” factors.
Existing boat addendum:
• Chronological age allowance
• Relaxed type form requirements
• Alternative formulas
HIGH PERFORMANCE RULE
designer advisory forum
Interested designers, sailmakers, builders, and other industry professionals may participate.
Once the Technical Committee completes testing of the bases and correctors the forum will be invited to test the rule and comment.
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OWNER advisory forum
An owners committee will be formed to help focus HPR on the kind of boats owners and crews want to race.
Of course everyone wants to sail in the kind of boat that will be fun to sail, and win.
Owners can be a big help on interiors, safety, and desirable vs. undesirable features.
HIGH PERFORMANCE RULE
rating formula
Final Rating Formula - Yields rating in metersR = L*AGE*BM*FR*DRA*VCG*CF*DE*RSA*RHF*RMAST*CCF*EP*AP
Final Output Description Format
1 L Length Linear number
2 AGE Age Allowance 1.000 +/-
3 BM Beam 1.000 +/-
4 FR Freeboard 1.000 +/-
5 DRA Draft 1.000 +/-
6 VCG Vertical Center of Gravity 1.000 +/-
7 CF Crew Factor 1.000 +/-
8 DE Displacement (empty) 1.000 +/-
9 RSA Rated Sail Area 1.000 +/-
10 RHF Rig Height Factor 1.000 +/-
11 RMAST Robust Mast 1.000 +/-
12 CCF Construction Cost 1.000 +/-
13 EP Engine-Propeller 1.000 +/-
14 AP Movable or Additional Appendages 1.000 +/-
Final Rating ® Linear number
Rating calculation• The starting point is to establish the rated length, L, which for new yachts is LOA
• For each factor, a base value is calculated from L
• The base values represent the target typeform in each size range
• As a factor strays further form the base, it is subject to increasing penalty or decreasing credit
• The difference between the actual value and the base value is determined and a corrector is calculated
• For a factor where its measured value is the same as its base value, its corrector is 1.000
• If the measured value indicates more boatspeed, the corrector will be greater than 1.000
• If the measured value indicates less boatspeed, the corrector will be less than 1.000
• A final linear rating is calculated by multiplying L times all of the correctors
• If all measured dimensions equal the corresponding base, the rating will = L
Bases – Version N1
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typical corrector
Slopes will vary depending on factor
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HPR Continuum
Phase II in process
Hpr rating spreadsheet
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Supporting data
HPR BASES 32, 35, 40, 45, 52, 70ft
HIGH PERFORMANCE RULE
Sample of data analyzed
Ker 40 Trial
Soto 40 Trial Chutzpah
High NoonTripp 41
LOA 12.16 12.32 12.32 12.49
LWP 10.76 11.75 11.55 10.58
Beam 4.11 3.75 3.77 3.82
Beam Base 3.73 3.76 3.76 3.80
Disp 4830 4350 4944 5275
Disp Base 3276 3390 3390 3513
Draft 2.60 2.60 2.68 2.40
Draft Base 2.86 2.89 2.89 2.92
P 16.60 16.30 17.00 17.96
E 5.29 5.80 6.00 6.05
MHW 3.33 3.72 3.77 3.83
MTW 2.27 2.41 2.18 2.46
MUW 1.36 1.63 1.22 1.68
MSA 54.66 59.17 61.52 67.55
Arm 3.14 2.81 2.83 2.97
HSA 41.10 40.28 41.26 47.59
HSA % 0.43 0.41 0.40 0.41
USA 95.76 99.45 102.78 115.14
USA Base 95.74 98.20 98.20 100.85
SPA 170.00 177.83 163.98 180.01
IRC sugg 170.05 174.55 174.55 179.40
STL 6.75 6.43 6.68 6.99IRC STL *1.15 6.84 6.99 6.72 7.04
IRC unless noted
HIGH PERFORMANCE RULE
Mills 45
High performance rule
tripp design HPR45
High performance rule
Mcconaghy 38
HIGH PERFORMANCE RULE
Carkeek Design Partners HPR 40
HPR 40
SPIN AREA175.0 m²
CARKEEK DESIGN PARTNERS HPR 40
Hpr 40 generic hull form
HIGH PERFORMANCE RULE
Base HPR 40 – Base Design Comparison
11 11.2 11.4 11.6 11.8 12 12.2 12.4 12.6 12.8 13 13.2 13.4 13.645
55
65
75
85
95
105
115
FARR400
RC44
Farr 40
Soto 40
MC38
Ker 40
HPR40 GP42
Displacement / Length Ratio
GP42 HPR40 Ker 40 MC38 Soto 40 Farr 40 RC44 FARR400
LOA (m)
DL
R
HIGH PERFORMANCE RULE
Base HPR 40 – Base Design Comparison
11 11.2 11.4 11.6 11.8 12 12.2 12.4 12.6 12.8 13 13.2 13.4 13.630
35
40
45
50
55
60
FARR400
RC44
Farr 40
Soto 40
MC38
Ker 40
HPR40
GP42
Sail Area Upwind /Displacement Ratio
GP42 HPR40 Ker 40 MC38 Soto 40 Farr 40 RC44 FARR400
LOA (m)
SA
up
/Dis
p
HIGH PERFORMANCE RULE
Base HPR 40- Base Design Comparison
11 11.2 11.4 11.6 11.8 12 12.2 12.4 12.6 12.8 13 13.2 13.4 13.630
40
50
60
70
80
90
100
110
120
FARR 400
RC44
Farr 40
Soto 40
MC38
Ker 40
HPR40 GP42
Sail Area Downwind /Displacement Ratio
GP42 HPR40 Ker 40 MC38 Soto 40 Farr 40 RC44 FARR400
LOA (m)
SA
do
wn
/Dis
p
HPR INSIGNIA
HPR WEBSITE
HPR FUNDING
US Tax deductible contributions may be made to:
Sailing Yacht Research Foundation ATT: Jim Teeters
25 Lighthouse View DriveMiddletown, RI 02842