Volvo Open 70 Measurement Group. Guide to. Rig in Boat Measurement

Transcription

1 Volvo Open 70 Measurement Group Guide to Rig in Boat Measurement Revision: Document Number: Status: C Comment : 11/11/10 Copyright This document, including the conceptual content thereof and any specifications and particulars thereto, is an integral part of the intellectual property of Volvo Ocean Race S.L.U This document is not to be reproduced or copied, in whole or in part or loaned or otherwise communicated to any third party or used in any manner detrimental to the interests of Volvo Ocean Race S.L.U without said company s express consent. Acceptance of this document shall be construed as agreement to comply with the aforesaid terms and conditions. measurers@volvooceanrace.com

2 Guide: Rig in Boat Measurement Revision: C Page No: 2 TABLE OF CONTENTS DOCUMENT CHANGE CONTROL INTRODUCTION PURPOSE SCOPE ROLES DEFINITIONS AND ACRONYMS REFERENCES INQUIRIES COMMENCEMENT BOAT MEASURER SUPPLIED EQUIPMENT PARTICIPANT SUPPLIED EQUIPMENT ACTIVITIES INITIAL MEASUREMENT MAST MOVEMENT RIGGING CONNECTIONS MAST DATUM (MD) MAST POSITION (MP) BASE OF FORETRIANGLE (J) MAINSAIL FOOT LENGTH (E) VERIFICATION COMPLETION... 11

3 Guide: Rig in Boat Measurement Revision: C Page No: 3 Document Change Control Revisions made to this document. Revision of Issue Author Brief Description of change Number 0 21/06/10 SR Initial draft issued for comment A 21/06/10 SR Forestay tension clarified for J measurement B 09/11/10 SR Amend condition of yacht to be on the hard and level. C 11/11/10 SR Reference top edge of band for MD measurement

4 Guide: Rig in Boat Measurement Revision: C Page No: 4 1 Introduction 1.1 Purpose As required by Rule 2.6.2, this guide describes the methodology that may be adopted to carry out the measurement of the stepped position of the rig and boom of a Volvo Open 70. A measurer may depart from the procedures detailed herein when the circumstances prevent these procedures from being followed and when the measurer is satisfied that the alternate procedure produces results of equivalent accuracy and repeatability. This guide is not intended to describe all of the measurements that may be carried out when establishing Rule compliance of a Volvo Open Scope This guide applies to the measurers and participant representatives tasked with carrying out the measurement. 1.3 Roles The participant s personnel will carry out the preparation for the measurement and will supply all labour and equipment (other than measurer supplied equipment) as necessary to facilitate the measurement. Key responsibilities for the activities are divided between the following positions; Title Organisation Role Measurer Volvo Ocean Race S.L.U Control the measurement process. Coordinate the participant representatives during measurement and carry out measurements as required. Supply specified measuring equipment. Technicians Participant Undertake measurement related activities including marking, moving of equipment and components etc. Participants representative Participant Liaise with Participant as necessary to ensure all preparations are complete, and all equipment and labour are available. 1.4 Definitions and Acronyms For the purposes of this procedure any acronyms shall be as defined in the Volvo Open 70 Rule Version 3.

5 Guide: Rig in Boat Measurement Revision: C Page No: References Volvo Open 70 Rule Version Inquiries All inquiries should be directed to; Shaun Ritson shaun.ritson@volvooceanrace.com

6 Guide: Rig in Boat Measurement Revision: C Page No: 6 2 Commencement Prior to commencing the procedure, the requisite components and equipment will be assembled and available on site. 2.1 Boat The boat shall; be ashore and set up level relative to DWL both fore and aft (+/- 3mm) and transversely (+/- 2mm) have the rig in its fixed position as specified in rule and side standing rigging tensioned. (Forestay shall be tensioned for measurement of J). have the boom fitted with the mainsail removed. The boom shall be supported by a topping lift such that it is aligned perpendicular to the aft face of the mast. Lifelines shall be fitted and tensioned. 2.2 Measurer supplied equipment The measurer shall supply; All tape measures, rulers, callipers staffs etc required to take the official measurements. A rig in boat measurement checklist. A stringline A digital level The MFM measurements as determined during the shed measurement. The position of the RPD screw as determined during the shed measurement. 2.3 Participant supplied equipment The participant shall supply; All labour necessary to assist in the measurement process A steel set square (approx 500mm x 500mm) (If necessary, a straight beam that is long enough to span transversely across the boat from sheerline to sheerline at MFS.)

7 Guide: Rig in Boat Measurement Revision: C Page No: 7 3 Activities 3.1 Initial measurement Prior to the arrival of the measurers the participants representative shall coordinate an initial measurement of the rig and boom as they are installed in the boat. This shall include all activities detailed herein. By conducting their own initial measurements prior to the arrival of the measurers the participant can confirm the actual measurements of the installed rig and boom against the designers expected values. These initial measurements also serve as a useful cross reference against the official values as determined by the measurers. Any discrepancy between the initial results and the official results can be identified and investigated at the time of official measurement. Carrying out initial measurements also helps to identify any obstructions to the measurement process prior to the arrival of the measurers. The results of the initial measurement shall be made available to the measurers. 3.2 Mast movement The measurer shall verify that the base of the mast tube is securely fastened to the mast step or adjoining structure. Verification shall be recorded on the checklist. Using a steel ruler, the measurers shall measure and record the amount of linear movement the mast has at the step and at the deck. 3.3 Rigging connections The measurer shall verify that; The shroud connections are above the local edge of the deck. The standing rigging chainplates are fitted wholly within the sheerline. All means of forestay, shrouds, spreaders, diamonds or jumper strut adjustment are positively locked. Tension measuring devices are incapable of adjusting rigging. The forestay is permanently attached. No spinnaker or jockey poles are fitted. Verification shall be recorded on the checklist. 3.4 Mast Datum (MD) The height of the mast datum band shall be determined relative to the Reference Point mid Upper (RPU) screws port and starboard. The measurers shall tension a stringline transversely across the upper lifelines aligned with the leading edge of the mast. The measurers shall measure back from the stringline to the shrouds P&S to confirm that the stringline is perpendicular to the centreline of the yacht. The measurers shall then measure and record the height A from RPU to the stringline P&S.

8 MFM (P&S) A (P&S) B Guide: Rig in Boat Measurement Revision: C Page No: 8 It may be necessary to project the height of RPU forward using a level depending on the Mast Position (MP). MD STRINGLINE BETWEEN UPPER LIFELINES RPU RPU DWL The measurers shall then measure and record the height B from the top edge of the Mast Datum band to the stringline. MD shall be recorded as; MD MFM PORT 2 MFM STBD A PORT 2 A STBD B Once compliance with the Rule has been established, the measurer shall measure and record the height of the shim stack between the mast step and the base of the mast tube. This method proves acceptable for the vast majority of rig installations. If the team is worried about the potential for sag in the stringline then the process can be repeated with a straight edge aligned across the deck in place of the stringline. The straight edge has to be supported on blocks or shims towards the deck edge to raise it above the deck camber. The measurer must ensure that the straight edge is indeed straight and that it doesn t sag excessively under its own weight.

9 LLF Guide: Rig in Boat Measurement Revision: C Page No: Mast Position (MP) The measurers shall use a digital level to project the position of the RPD screw vertically. Using a steel tape measure, the measurers shall determine the horizontal distance C between the RPD screw and the forward face of the mast at MD. Mast position (MP), shall be recorded as MP " C" Dis tan ce from LLF to RPD MD 'C' RPD DWL 3.6 Base of Foretriangle (J) The forestay shall be tensioned. The measurers shall use a digital level to project the position of the RPD screw vertically. Using a steel tape measure, the measurers shall determine the horizontal distance F between the RPD screw and the forward face of the mast at MD. The measurers shall use a straight edge to bridge any forestay recess. Using a steel tape measure, the measurers shall determine the horizontal distance D between the RPD screw and the forward face of the forestay at deck level.

10 LLF Guide: Rig in Boat Measurement Revision: C Page No: 10 MD 'F' "D" RPD The base of Foretriangle (J), shall be recorded as, DWL J " F" " D" 1 2 Diameter of forestay 3.7 Mainsail Foot Length (E) The measurer shall confirm that the boom is aligned perpendicular to the mast using a steel set square. Using a steel tape measure, the measurers shall determine the mainsail foot length (E) measured from the aft face of the mast at BAD to the forward edge of the boom measurement band. This measurement shall be recorded. "E" 90 BAD With the boom aligned perpendicular to the mast, and using a straight edge or similar, the measurer shall project a fair extension of the top of the boom or boom track onto the aft face of the mast. The measurer shall verify that this point is not below the top edge of the BAD band marked on the mast. Verification shall be recorded on the checklist.

11 Guide: Rig in Boat Measurement Revision: C Page No: 11 4 Verification Complete the measurement verification checklist. During the measurement the owner s representative shall have the opportunity to verify any measurement that the measurer records. 5 Completion Upon completion of the rig in boat measurement the measurer(s) shall formalise their notes and measurements recorded and provide a copy to the participant s representative and the Chief Measurer..

12 Measurement Verification Checklist Rig in Boat Volvo Ocean Race Team Hull-1234 MG-405(Rig in Boat) Revision A 10 RIG MEASUREMENT (see Figure 2) 10.1 Rig Limitations Only one mast is permitted. The mast shall be stepped with the base fitting (if installed in the mast and included in the mast weighing condition (see rule 10.2)) or end of the mast tube no higher than 550mm above MWL. The mast shall not be permanently bent in its unloaded state, nor shall it be designed and/or rigged to rotate or twist under Load. The base of the mast tube shall be securely fastened to the mast step or adjoining structure, in such a way that it can not move fore and aft, athwartships nor vertically whilst racing Rig ID No Base of mast tube fastened to mast step or adjoining structure Rig ID No Base of mast tube fastened to mast step or adjoining structure The mast and mast position shall be fixed at the step and the deck, other than a natural linear movement at the deck not exceeding 5mm in any direction. Maximum linear movement at deck (mm) Maximum linear movement at deck (mm) The mast shall be supported by a permanent forestay and permanent shrouds. All connections or adjustment shall be at or above the local edge of the deck, with the exception of the forestay and any inner forestay(s), which may be attached in recesses (see rule 4.6.4). Additional standing and running rigging is allowed. Standing rigging chainplates shall be fitted wholly within the sheerline. Adjustment of the permanent forestay, shrouds, spreaders, diamond or jumper struts and any other side standing rigging while racing is not permitted and all means of adjustment shall be positively locked, except where specifically permitted in rule Adjustment of inner forestays is permitted. Shroud connections above the local edge of the deck Standing rigging chain plates fitted wholly within the sheerline All means of forestay, shrouds, spreaders, diamonds or jumper struts adjustment positively locked Shroud connections above the local edge of the deck Standing rigging chain plates fitted wholly within the sheerline All means of forestay, shrouds, spreaders, diamonds or jumper struts adjustment positively locked Page 1 of 4

13 Measurement Verification Checklist Rig in Boat Volvo Ocean Race Team Hull-1234 MG-405(Rig in Boat) Revision A Devices for measuring standing rigging tension are permitted provided that they are incapable of being used to adjust the standing rigging. No adjustable tension measuring devices No adjustable tension measuring devices The mast may be steadied to balance a slackened backstay and running backstays either by the use of headsail or spinnaker halyards and their proper winches, or by a strop attached to the deck aft of FFS taking tension on an articulated forestay. The forestay shall be permanently attached at the deck and at the IG point (see rule 10.7). Inner forestay(s) shall be permanently attached at the mast below the IG point, and may be detachable at the deck, but shall not be attached forward of the forward end of J. Forestay permanently attached to the deck Forestay permanently attached to the deck Spinnaker poles and jockey poles are not permitted. No spinnaker poles No spinnaker poles 10.3 Mast Datum (MD) MD shall be measured from DWL (see rule 7.2) and MD shall not be greater than 2.500m. MD shall be marked as the top edge of a permanent 30mm measurement band. MFM PORT = MFM STBD = (MFM PORT +MFM STBD )/2 = A PORT = A STBD = (A PORT +A STBD )/2 = B = Mast Datum 30mm Measurement Band Reference shim stack height MFM PORT = MFM STBD = (MFM PORT +MFM STBD )/2 = A PORT = A STBD = (A PORT +A STBD )/2 = B = Mast Datum 30mm Measurement Band Reference shim stack height Page 2 of 4

14 Measurement Verification Checklist Rig in Boat Volvo Ocean Race Team Hull-1234 MG-405(Rig in Boat) Revision A 10.5 Mast Position (MP) The horizontal distance from LLF (see rule 7.4.1) to the forward face of the mast at MD shall not be greater than m, with the mast in it's fixed position as specified in rule Distance from LLF to RPD = Horizontal distance between the RPD C = screw and the forward face of the mast at MD. Mast Position Distance from LLF to RPD = Horizontal distance between the RPD C = screw and the forward face of the mast at MD. Mast Position 10.6 Base of Foretriangle (J) J shall be measured horizontally from the forward face of the mast at MD to the intersection of the centreline of the tensioned forestay with the deck. J shall not be greater than 9.500m, with the mast vertical, or as close to vertical as possible if set with permanent rake. Forestay tensioned Horizontal distance between the RPD F = screw and the forward face of the mast at MD Horizontal distance between the RPD screw and the forward face of the forestay at deck level D = Diameter of forestay = J measurement Forestay tensioned Horizontal distance between the RPD F = screw and the forward face of the mast at MD Horizontal distance between the RPD screw and the forward face of the forestay at deck level D = Diameter of forestay = J measurement Page 3 of 4

15 Measurement Verification Checklist Rig in Boat Volvo Ocean Race Team Hull-1234 MG-405(Rig in Boat) Revision A Mainsail Foot Length (E) E shall be measured, with the top edge of the boom perpendicular to the aft face of the mast, from the aft face of the mast at BAD, ignoring any mainsail track or luff groove, to the forward edge of a permanent 30mm measurement band, of contrasting colour, beyond which the mainsail clew point shall not be set. E shall not be greater than 8.500m. Boom perpendicular to mast Mainsail foot length E 30mm Measurement Band Boom perpendicular to mast Mainsail foot length E 30mm Measurement Band Boom Above Datum (BAD) BAD shall be the vertical distance from MD to a fair extension of the top of the boom or boom track, when perpendicular to the aft face of the mast. BAD shall not be less than 1.000m. BAD shall be marked as the top edge of a permanent 30mm measurement band of contrasting colour. Boom Above Datum 30mm Measurement Band Boom Above Datum 30mm Measurement Band Page 4 of 4