RATING CERTIFICATE
Sail number : K7630

YACHT DESCRIPTION

Name of Yacht: Riala
Request date : 11 05 2015
Launch year :1968
Designer : Kim Holman
Design year : 1963
Builder : Uphams
Class name : Twister 28
Usual place of sailing : South coast

Declared dimensions :
Lenght Over All (LH) = 8.61 m
Length on the Water Line (LWL) = 6.55 m
Max width ( Bo ) = 2.46 m
Draft (Tmax) = 1.52 m
Displacement factor (FD) = 3.436


Correction factor calculation

Type of rigging : bermudian sloop = 1
Hull: classic 2
C2 = 0 Kref = 0.187
C2a : 0.057
Regatta series : no = 0
Vintage bonus (build): 1968 = 0.028
Vintage bonus (design): 1963 = 0.021
Cumulative vintage bonus: 0.049
Hull material : other = 0.05
Mast material : wood/aluminium/steel = 0
Boom material : wood/aluminium/steel = 0
Mast or boom penality : 0
Material of mast or boom different from original : no = 0
Material other spar different from original : no = 0
Sails material : type 2 = 0
Propeller type : 3 fix blades = -0.16
Winches ? : with = 0

Correction factor (C)= 0.996

BERMUDIANS
Max foresail area: 24.09 mē
GenoaJL = 10.30 ; LPG = 4.48

BERMUDIANS
Main total area: 20.2 mē
Mainsail P = 9.60 ; E = 3.66

No downwindsail

RATING ( Rc ): 5.423

Time corrected Factor ( Ftc ): 0.7931

The delivery of a JCH certificate does not have to be understood as the elligibility of the boat to classic regattas.
Elligibility to a specific regatta is governed by the elligibility rules the organizers has decided and have displayed in the Notice of Race.

Certification commission :

Conseil JCH

Date of certificate :

11 05 2015

JCH commission member :

Olivier Beau

Certificate number :

2015051390