TOC
Table of Contents
PREDICTION EQUATIONS AND CONVERSIONS FOR PHRF
C.KRAMER'S MEASUREMENT PERFORMANCE RATING (MPR)
JIM TEETERS VPP FOR CALCULATING THE NFSDELTA
TIME ON TIME MULTIPLIERS WITH SECONDS PER HOUR HANDICAP
RECOGNIZED CLASS ASSOCIATION SPECIFICATIONS (ODR)
Farr 30 (MUMM)
Farr 40
J 105
J 22
J 24
Melges 24 CF
Melges 32
Shark 24
Sonar
Ultimate 20
Flying Tiger 10M
Annual Club Membership Fee
Policy 1-2
Policy Statements
1- Mailing Lists
Date:March 28,1994
Abstract:
Mailing lists, or lists of members and certificate holders, are for the purpose of communication and management of PHRFLO. Therefore, membership lists, either with or without addresses, will not be distributed in their entirety.
Should a PHRFLO handicapper require information on boats in a class, only the information included in the class listing, with the addition of the specific club that boat is a member of will be provided.
Should a member PHRFLO club request information on all certificate holders, a supply of mailing labels will be made available of active certificate holders.
Update: March 98
Commercial organizations wishing to contact PHRFLO certificate holders will be able to contract the organization to prepare and mail flyers, etc. to a select group of certificate holders for a fee as set out by the organization.
As at March 98: $98.00 / 100 Cdn $ 75.00 / 100 U.S.
price includes postage, printing cost if applicable are extra.
2. Mainsail Policy
Update:March 1990
Regarding the necessity for mainsail measurements. Mainsails may optionally be measured at any time. Mainsails mustbe measured in the absence of a fixed backstay regardless of the status of battens.
Update:May 2002
All new mains are to be measured (this includes all new Certificates on boats not currently in PHRFLO data base). No new certificate is to be issued without the mainsail measurement. Enacted: May 2002.
Update: November 2002
All mainsails will be measured for boats with No backstay, backstay deflectors and removable backstays.
Update: April 2004
Any NEW sail must have a sail makers Certificate with required information or Handicapper must measure all mainsails.
Also: All boats with mainsails over 106.1% will be reviewed annually.
Update:April 2015
All (new to a certificate) mainsails must be measured.
Policy 3
3. Fee schedule
Date:March 28, 1994
Abstract:
There will be two Fee schedules New Issue and Update
The New Issue Price will be $25 Canadian, or $20 US. The New Issue price applies to New Application, Renewal and New Boat certificates. Effectively, when a complete certificate is required, the New Issue charge will apply.
The Update Price will be $5, both Canadian and US. This will be applied to an application that has a change (such as a new sail of different dimensions) and will require the issue of a new certificate. This will also apply for a reprint of a certificate.
Information changes, such as address updates, will have no charge.
Handicapper or PHRFLO initiated changes, such as error or reissue of an SP, will not require a charge.
Update:January 13,1996
RUSH certificates Due to the increased demand for this kind of service and the resulting time demands put on the administration, a new policy on Rush Certificates was enacted.
It was agreed that: A turn around time for certificates of 1 week is typical and that any faster request would be subject to an addition of $10.00 on top of the regular fee.
Update:January 24,1998
Effective immediately Certificate Fees for Canadian Members will increase to $28.00. Canadian Yacht Club Dues will also increase to $ 70.00
Change Fee, Rush Surcharge, Event Certificates and Us Fees will remain the same.
Update:January 15,2000
Effective immediately Certificate Fees for Canadian and US Members will increase to $35.00 and $25.00 respectively.
Update: January 19,2002
Effective immediately Certificate Fees will apply annuallyat the present rate of $35.00 and $25.00.
Update: March 2002
Effective March 2003, a minimum of 5 certificates will be required by each member. Failing that, a club will be charged a certificate surcharge in addition to their yearly dues equal to the minimum.
Update:February 1, 2003
Effective immediately annual Certificate Fees for Canadian and US Members will decrease to $28.00 and $20.00 respectively.
Update:January 10, 2004
Effective immediately. Clubs will be given 2 options for Dues payments.
Option 1. Certificate Fees will be added to the Club Dues amount and club will collect fees.
Certificate Fee for this will decrease to $20 Cdn $15 US.
Option 2. Club will continue to use PHRFLO manual system for processing certificates individually. Certificate Fee will increase to $30 Cdn $25 US.
Update:January 14, 2006
Effective immediately annual Membership Fees for US Members will increase to $65.
Opt Out option will no longer be available to members.
Update:January 12, 2008
Effective immediately, annual Club Membership fee of $75 Cdn/ $65 US. has been removed.
Club membership will be maintained through payment of the certificate portion of the dues.
Certificate fees will increase to $25 per certificate. A Race Credit of $5 per certificate will be applied to the dues invoice.
US fees will be increase to match those of the Canadian Fees.
Update:January 12, 2013
There will be a $5 increase in the Certificate fee effective in 2014.
It is recommended that Member Clubs begin collecting the fee during the 2013 season for payment on their 2014 dues invoice.
All other fees and credit remain the same.
Update:January 11, 2014
There will be a $5 increase in the Certificate fee effective in 2015.
It is recommended that Member Clubs begin collecting the fee during the 2014 season for payment on their 2015 dues invoice.
All other fees and credit remain the same.
Update:January 9, 2016
The US Certificate fee will be dropped from $35 to $25 in line with the current exchange rate.
The Nonmember Certificate Surcharge (currently $35) will be removed.
All other fees and credit remain the same.
Update: January 21, 2017
The US Certificate fee will be charged in Canadian Funds allowing US Members to pay their dues at the current rate of exchange.
The Fee for a Certificate will be increased by $0.97 to $35.97 in anticipation of applying the HST to our fees starting in 2018.
The calculation was made to maintain a basic fee of $35.00 for those clubs who submit race results.
Certificate Fee: $35.97
Race Results Credit: - $5.00
Sub total: $30.97
HST: $4.03
Update: January 19, 2019
The Fee for a Certificate will be increased by $4.43
With Race Credit =$40.40 - $5.00 (Race Credit) =$35.40+$4.60 (HST) = $40.00
With NO Race Credit = $40.40 + $5.25(HST) =$45.65
Policy 4
4. Privacy Policy
Date: April 4, 2009
The purpose of PHRFLO is to equitably handicap boats on Lake Ontario.
In furtherance of this mission, certificate holder’s names, boat names, yacht club affiliation, boat information, and handicap will be available for public viewing on our web site. This is to enable handicappers and regatta organizers to fairly determine if a handicap is correct and to ensure fair racing on the lake. Certificate holder’s physical address, mailing address, telephone, mobile phone, fax number and email address will not be revealed unless permitted by the individual in question.
Handicap certificates are made available for viewing on our website by Registered Member Club Handicappers on Lake Ontario who have secure password authentication.
Personal information supplied to us may be used to keep the provider informed and up to date on the activities of PHRFLO.
Conversions
PREDICTION EQUATIONS AND CONVERSIONS FOR PHRF
OCTOBER/85
One of the difficult tasks for handicappers is the assignment of a handicap for a boat with limited or no race data. This occurs with new designs and one offs. It is the intent of this article to provide various methods that have been designed to fill this void. No particular method is endorsed and where possible the known variation (mean difference) between method and actual PHRFLO SP's will be quoted. It must be remembered that we are not a measurement rule and that we are dependent on the analysis of race data to ensure the accuracy of our handicaps. It still is however, in our best interest to attempt to assign an initial handicap as accurately as we can estimate it in the interest of fair and equitable racing without unduly penalizing new designs.
Present PHRF-LO handicaps are said to have an average error of 4.5 seconds/nautical mile. Rounding off to 3 seconds/nautical mile interval accounts for l.5 seconds/nautical mile of this. With even the best accuracy in prediction formula we would expect that we could not get better than this value.
It should be remembered when taking information from brochures or manufacturers that builders do not apply a consistent method in specifying boat displacement and the accompanying waterline length.
CONVERSIONS
IOR: SP=2160 x (1/√(IOR RATED LENGTH)-1/√(150))- 125
(unreliable, mean diff. age/design dependent)
IRC: SP=(650/TCF)-550
MORC: SP=(2160 x (1/√(MORC)1/√(160)))-112
(mean diff = 3.51 sec/mi., very weight sensitive)
PORTSMOUTH: SP=11.8 x DPN - 827 FOR DPN <84
SP=5.67 x DPN - 310 FOR DPN >=84
IMS: IMS (GP) - 550
From SAIL May/79 PP 141145 Article by Frank Watts
WP = 747.5 - ( 99.7 x √(LWL)) - (4.79 x (SA / D)) - (17.67 x AS1)
(note 1st figure changed from 741.6 to reduce mean diff.)
SA=100 x SAIL AREA = .5 x ((I x J) + (E x P)) LWL = WATERLINE LENGTH
D=(BOAT WEIGHT LBS./62.4)^2/3
LH = LENGTH of HULL
AS1=ASPECT RATIO OF THE MAIN = P/E
MEAN DIFF. PSP vs PHRFLO SP's = 13.67 sec/mi.
Kramer's
KRAMER'S MEASUREMENT PERFORMANCE RATING (MPR)
The need to include a measure for keel efficiency (lift/drag) and sail plan efficiency in terms of wind gradient was felt necessary to improve accuracy after a review of "A VELOCITY PREDICTION PROGRAM FOR OCEAN RACING YACHTS REVISED TO JUNE 1978" BY J. E. KERWIN, REPORT #7811 FROM THE H. IRVING PRATT OCEAN RACE HANDICAPPING PROJECT M.I.T., OSP #81535.
MPR= 849 - (78 x √(LL)) - (4.75 x (RSA/D)) - (42.5 x AK) - (1.68 x (LOG(304 x H))2) - (5.7 x BC)
LL=RATED LENGTH = (.3 x LH)+(.7 x LWL)
LH = LENGTH of HULL
LWL = WATERLINE LENGTH
RSA=RSAM+RSAF = IOR SA FOR 150% GENOA, 180% SPINN, SPIN.POLE=J
RSAM=(.35 x E x P)+(.2 x E x (P - 2 x E))
RSAF=(.683 x I x J)+(.125 x J x (I - 2 x J))
D=(DIS / 62.4).667
DIS = BOAT WT.+ CREW WT.
BOAT WT. = .4 x MDL x LWL x B x 62.4 lbs.
CREW WT. = 1.342 x LWL x √(I x J)
B= Maximum Beam
MDL = LOR MEASURED HULL DEPTH AT POINT OF MAX. BEAM
OR…. IOR HULL DEPTH MEASUREMENT (.5 x (CMDI+MDI))
OR…. WITH MEASURED WEIGHT (e.g. MORC VALUES) :
DISPLACEMENT / (24.95 x LWL x B)
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AK=AK of KEEL |
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Fixed and Daggerboard: |
AK = KEEL DEPTH / KEEL LENGTH AT 50% DEPTH |
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Centerboard: |
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AK = .25 x BOARD DEPTH / BOARD LENGTH AT 50% DEPTH |
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Keel CB: |
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AK = (KD+.25 x BD) / ((KD x KL)+(BD x BL)) |
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NOTE: |
IF DAGGERBOARD AK >1.75 : |
AK = 1.75 |
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IF FIXED KEEL AK >1.75 : AK = 3.06 x KL / KD |
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H=(.6 x I)+(.4 x P)+4.6 |
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BC=ABS((.25 x LWL)+2.67 - B) |
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B = MAXIMUM BEAM |
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My thanks for much hard work done by C. Kramer in the preparation of this formula.
MEAN DIFF. MPR vs PHRFLO SP'S = 6.66 seconds/nautical mile (172 yachts used for this analysis)
Jim T.
JIM TEETERS VPP FOR CALCULATING THE NFSDELTA
In 2010, PHRFLO contracted US Sailing’s Offshore Office to develop algorithms based on their Velocity Prediction Program and a representative database of Lake Ontario yacht classes.
These new scientific formulae are based on class measurements and result in objective estimates of boat performance. As a result we now have objective deltas (differences) between FS and NFS handicaps for all classes.
In 2013 the NFS-Delta was established using the Jim Teeters GPH (General Purpose Handicap) formula.
In 2018 the NFS-Delta was modified to the Jim Teeters WL10 (Windward Leeward 10 knots) formula (using PHRF-LO sail area formula) with the option of adjusting it after 2 years of race results in response to observed performance.
NFSSP = FSSP + NFSDelta
| 2013 GPH Co-efficients General Purpose Handicap |
2018 WL10 Co-efficients Winward Leeward 10 knts |
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SA-Disp 1/DLR 1/DLR^2 (Sadn/Disp)^2 Constant |
C1 C2 C3 C4 C5 |
-24.2535 33.67219 -431.522 92703.04 -0.00386 |
-31.9696 29.9106 -1015.20 259389 -0.0056 |
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Sail Area Calculations:
Amain = (P/8)*(2 * E + 3 * (0.65*E) + 2 * (0.38*E) + Max(0.04*E or .5))
Agenoa = 0.5 *1.55 * J * √ ( I^+ J^)
Aspin = 1.8 * .79 * JSP * (ISP2 + JSP2 ) ^ 0.5
Parameters:
SAdn Ratio = (Amain + Aspin) / (Amain + Agenoa)
DLR = 1 * Disp / 2240 / (0.01 * LWL) ^3
SadnDisp = (Amain + Aspin) / (1.12 * Disp/64)^(2/3)
Rating Delta:
NFSDelta = C1 + C2 * SAdn Ratio + C3 * DLR^(1)+ C4 * DLR^(2)+ C5 * SadnDisp^2
ODR Recognized Classes
RECOGNIZED CLASS ASSOCIATION SPECIFICATIONS
USED FOR ONE DESIGN RATINGS (AKA ODR)
PHRF-LO allows owners to apply for a handicap certificate that is designed to reflect a standard handicap for the vessel when it conforms to that particular class’s rules. This includes but is not limited to sail size maximums and prop configurations. Handicap adjustments for “Class Configuration” are reflected in the tables below.
Standard Potential (SP) “Total R”= Adjusted Speed Potential (ASP)
(Please refer to the SP List for the current class handicap)
Certificates for these boats will reflect the FS handicap as ODR.
The Class stamp must be visible on the sail to apply for this.
New adjustments for April 2017
The following classes are recognized and accepted by PHRFLO as Class Association One Design Rated classes.
Our database specifications and links to their associated rules are:
Annual Fees
Fee Schedule
All fees are payable in Cdn Funds
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Certificate Fee |
$40.40 |
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New Member Certificate Deposit |
$404.00 |
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Member Annual Certificate Deposit |
# Certificate times Certificate Fee |
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Race Submission Credit (per certificate) |
$5.00 |
Member Certificate Dues are reconciled at the end of the Season and are either billed a Balance Dues or Credit against their "Member Annual Certificate Deposit".
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Other Items: |
Canadian |
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Race Analysis Binder Printed and Mailed |
$50.00 |
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Direct Mailing to owners (per 100, printing costs not included) |
$100.00 |
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Standard Boat Characteristics Printed report |
$30.00 |
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Handicappers Manual Printed and Mailed |
$40.00 |