NYYC Cruising Rule
The New York Yacht Club's Cruising Rule (NYYC CR) is a simple rating rule for cruising yachts characterized by vintage design or a substantial bias toward cruising. The intent of the Rule is to provide casual but spirited racing for yachts whose primary racing of the season may be on the Squadron Runs of the NYYC Cruise. It is a formula-based rule that uses owner-furnished measurement data. It produces a single-number rating that is used in time-on-distance scoring. If a yacht is considered to be more racing oriented than intended for the Cruising Rule, it may be requested to consider entering another Non-spinnaker Division such as ORC-NS. The Technical Committee has established screening values of sail-area-to-displacement, displacement-length ratios and other metrics that assist in determining whether a yacht is eligible for the Cruising Rule. Please see below for the Class Rules and (RRS and ERS) Modifications.
Rating in S/M = 2340/R^.5 + 183; R = RF * ((.98L) + (1.32 * SA^.5) - (1.5 * DSP^.333) + (DrC)); where SA = ((JMF * LPF * I * J)/2 +MMF*MSA*.96/LPF+ .4 * MZA) * ((Max of I or P)/(J + E + E2))^.3; and LPF=1+0.4(LPJ-1) where LPJ=LP/J expressed as a fraction; and L = greater of (1.05 * LWL) or (LOA + 3LWL)/4; DrC = (Rated draft - Base draft) *(1 if positive or 0.5 if negative or 0 for fin with bulb or wing if negative); and RF = Prop Factors * Keel Factor * Mast Spreader Factor. Prop Factors are: In Aperture .975; Exposed Shaft .99; Sail Drive .985; Off Center .99; 2 Blade Fold/Feather 1.01; 3 Blade Fold/Feather 1.00; Solid 2 Blade .975; Solid 3 Blade .95; Outboard 1.02; Twin Screw .96. Keel factors are: Fin 1.02; Full .975; Center Board .96; Drop Keel 1.03; Fin with bulb or wing 1.03. Mast/Weight Factors are: Wood .98; Aluminum 1.00; Carbon 1.01; No. of pairs of Spreaders: Zero .98; 1 or more 1.00. Ec = .5 * E + .75 * GM + .5 * GU; Base draft = (0.15 * LWL + 1.5)FT; Rated draft = Draft(keel) or Draft(CB); Draft(CB) = Up + .5*(DN - UP)^2/DN; Sail Material Factors: Mainsail (MMF = 1.00 if Woven; 1.02 if Laminated Cruising; 1.04 if Laminated Racing; 1.05 if Laminated Racing with Carbon); Jib (JMF = 1.00 if Woven; 1.03 if Laminated Cruising; 1.06 if Laminated Racing; 1.07 if Laminated Racing with Carbon). Other sails MF=1.00 if woven. Honorary Winners Penalties to be applied to the yacht’s rating: 2% for first, 1% for second based on performance in class in the previous year’s Cruise.
- No “DDS Foils” or any other type of “vertically lifting foils”.
- RRS 53 is modified to allow power operated winches and auto pilots.
- Crew shall be stationed fully inside the lifelines (this changes RRS 49.2).
- No SPINNAKERS, SAILS SET FLYING, or Mizzen Staysails are allowed.
- ERS G.1.3 (d) - definition of a HEADSAIL - is changed to 50% from 75%.
- Boats originally designed with multiple FORESTAYS may carry staysails on their inner FORESTAYS. Otherwise, only one HEADSAIL shall be carried in the foretriangle at any one time.
- When exchanging one HEADSAIL for another, the HEADSAIL being struck shall be fully on deck or fully furled, if furling, before the new HEADSAIL is hoisted or unfurled, if furling (i.e., HEADSAIL changes are intended to be bald headed).
- A spinnaker pole no longer than J may be used to wing out a HEADSAIL on the side opposite the main boom as long as no other sail is set in the foretriangle.
- The number of HEADSAILS allowed on board shale be: one up to 155% J; one up to 135% J; one up to 110% J. There is no restriction on HEADSAILS of less than 100% J.
