RATING CERTIFICATE
Sail number : 675Y

YACHT DESCRIPTION

Name of Yacht: Rompa Photo 1 - Photo 2...
Request date : 2019-04-27
Launch year :1967
Designer : C.R. Holman
Design year : 1963
Builder : Uphams
Class name : TWISTER GRP
Usual place of sailing : St Mawes

Declared dimensions :
Lenght Over All (LH) = 8.61 m
Length on the Water Line (LWL) = 6.55 m
Max width (BH) = 2.46 m
Draft (TE) = 1.52 m
Displacement factor (FD) = 3.908


Correction factor calculation

Type of rigging : bermudian sloop = 1
Hull: classic 2
C2 = -0.03 Kref = 0.179
C2a : 0.106
Performance group : Cruiser Racer = 0
Vintage bonus (build): 1967 = 0.026
Vintage bonus (design): 1963 = 0.021
Cumulative vintage bonus: 0.047
Hull material : other = 0.05
Mast material : wood/aluminium/steel = 0
Boom material : wood/aluminium/steel = 0
Mast or boom penality : 0
No mast change = 0
No spar change = 0
Sails material : type 2 = 0
Propeller type : tripale = -0.2
Winches ? : with = 0

Correction factor (C)= 0.973

BERMUDIANS
Max foresail area: 23.3 mē
Genoa HLU = 9.30 ; HLP = 4.80

BERMUDIANS
Main total area: 15.15 mē
Mainsail P = 3.10 ; E = 8.50

Larger downwindsail area:
SL / ALE = 10.20, SL / ALU = 10.20,
SHW / AMG = 5.50, SFL / SF = 5.60
Area: 46.92 mē

RATING ( Rc ): 5.2909

Time corrected Factor ( Ftc ): 0.7914

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 :

2019-04-28

JCH commission member :

Costalas Peter

Certificate number :

4-289-2701