Warship 2009 - Airpower at Sea

512 Pages·2009·25.016 MB·512\512

RINA
WARSHIP 2009: AIRPOWER AT SEA
17 - 18 June 2009
© 2009: The Royal Institution of Naval Architects
The Institution is not, as a body, responsible for the opinions expressed by the individual authors or
speakers
THE ROYAL INSTITUTION OF NAVAL ARCHITECTS
10 Upper Belgrave Street
London SW1X 8BQ
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ISBN No: 978-1-905040-59-9
Aircraft Tie-Down Points for
the Affordable Aircraft Carrier
Systems and engineering technology
Contents
Introduction
(cid:32)
Significance
(cid:32)
Design Approach
(cid:32)
Cost Savings
(cid:32)
Meeting the requirements
(cid:32)
Conclusions
(cid:32)
©Frazer-Nash ConsultancyLtd. All rights reserved. Confidential and proprietary document.
Introduction
QE Class commercially driven design
(cid:32)
Specific and stringent set of
(cid:32)
requirements
No ‘COTS’ Tie-downs designs
(cid:32)
suitable
New design required
(cid:190)
Review of existing designs
(cid:32)
Assessed risks and cost implications
(cid:32)
of each design feature
Major cost savings can be achieved
(cid:190)
by applying advanced engineering to
a simple part
©Frazer-Nash ConsultancyLtd. All rights reserved. Confidential and proprietary document.
Requirements
Cheaper procurement and installation
(cid:32)
10,000lbs SWL in any direction
(cid:32)
Integrity of deck maintained under all local and global loading
(cid:32)
Compatible with lashing requirements
(cid:32)
Lifespan of 30 years
(cid:32)
Minimises FOD issues
(cid:32)
Minimal water retention
(cid:32)
Flush mounted – compatible with CV operations
(cid:32)
Standard ‘Self-Jigging’ design, to be installed on any panel line
(cid:32)
Automated welding process – no prep on deck, unit pre-prepped
(cid:32)
Standard design, suitable for welding into between 14 to 30mm plate
(cid:32)
with minimal modification (performed by supplier)
Simple testing criteria
(cid:32)
Equivalent material to Lloyds Grade EH46 Steel for the main ‘cup’
(cid:32)
…..
(cid:32)
©Frazer-Nash ConsultancyLtd. All rights reserved. Confidential and proprietary document.
Significance
Aircraft tie-down points
(cid:32)
Small and simple – but not insignificant
(cid:32)
Not complex
(cid:32)
Responsible for holding down Carrier’s most expensive asset
(cid:32)
4,000 per vessel
(cid:32)
Total baseline cost of £9,000,000 per ship
(cid:32)
Systems Design Approach – Main Factors
(cid:32)
Quantity
(cid:32)
Installation
(cid:32)
Functionality
(cid:32)
Integration with the deck
(cid:32)
Maintenance
(cid:32)
Repair & refit
(cid:32)
©Frazer-Nash ConsultancyLtd. All rights reserved. Confidential and proprietary document.
Design achievements
Tie-down distribution/layout Pot Protective
(cid:32)
Coating
Reduction in quantity of 34%
(cid:190)
Functionality
(cid:32)
Designed to interface with MC2 lashing
(cid:190)
Installation
(cid:32)
Assembly and welding costs reduced by
(cid:190)
Cross Bar Cruciform
nearly 1/2
Maintenance, repair & refit
(cid:32)
Advanced materials selection – Superduplex S/S + TSA Coating
(cid:190)
Minimise through life maintenance – cost saving 79%
(cid:190)
Minimise repair & refit – cost saving 52%
(cid:190)
©Frazer-Nash ConsultancyLtd. All rights reserved. Confidential and proprietary document.
Tie-down distribution/layout
©Frazer-Nash ConsultancyLtd. All rights reserved. Confidential and proprietary document.
Functionality
©Frazer-Nash ConsultancyLtd. All rights reserved. Confidential and proprietary document.
Installation
©Frazer-Nash ConsultancyLtd. All rights reserved. Confidential and proprietary document.