ORCi 2011

ORCi 2011 börjar ta form. De viktigaste förändringarna för performance cruisers är förbättringar kring när spinnaker blir effektivare än fock. Påverkar nog ganska lika över hela linjen.
Nedan ser ni punkterna man jobbat med.

Summary of proposed changes to the 2011 Beta VPP and recommendations to the Congress:
a) Truncated stern fine tuning (removal of tail, new wave height)
b) Crew on the leeward side in downwind conditions
c) Modification of long keels root chord Residuary Resistance
d) Double keel coding
e) VMC (Velocity Made good along Course) introduction
f) Spinnaker coefficient revision below AWA=60°
g) New min SPIN REEF=0.85 (smoothed by Adef/Aspin<=1), and MAX HEEL=28° to increase accuracy in crossover between jib and spinnaker
h) Introduction of the spinnaker SHAPE FUNCTION to deal with inefficiency of big spinnakers in light winds.
i) Updated Blanketing function for spinnaker with average spinnaker girth
j) CODE0 different treatment with double run (one as code0 and one as asymmetric on CL)
k) Non-Spinnaker configuration handled with an asymmetric on CL with an area 3.5% higher than the jib
l) Furling mainsail new gyradius adjustment
m) Furling Jib different set of coefficients only for jibs with overlap > 110%
n) Possibility to install Mobile Bowsprit that will be treated as pole of equivalent length
o) Change of mainsail default girths for ORC CLUB boats with mainsail not measured
p) Possibility to adopt lenticular rod (for windage calculation a 25% diameter of normal rod will
be assumed)
q) Carbon construction gyradius adjustment equivalent for C/R and Performance divisions
r) New ILC handicap based on WW/LW courses (and correspondent TCF, PLT, PLD and triple
number variations)
The above modifications represent the list of Recommendations to the Congress.
ITC strongly suggests that the new beta VPP will be widely distributed immediately to expert RO
and DVP users for beta testing. Former ITC members have also expressed their availability to be
part of the beta testers too.
Using this method of beta testing and debugging performed before the end of the year should enable
the ORC to avoid having to issue new versions of the VPP during the 2011 season.
9 Strategic planning for work after this meeting; Main projects for 2011
− New residuary Resistance
− Heeled drag increase in accuracy
− Jib-Spinnaker crossover increase of accuracy
− Update of documentation

Protokollen från mötet i Aten hittar ni här:
http://www.orc.org/minutes/ITC%202010.pdf