1、_SAE Technical Standards Board Rules provide that: “This report is published by SAE to advance the state of technical and engineering sciences. The use of this report is entirely voluntary, and its applicability and suitability for any particular use, including any patent infringement arising theref
2、rom, is the sole responsibility of the user.” SAE reviews each technical report at least every five years at which time it may be reaffirmed, revised, or cancelled. SAE invites your written comments and suggestions. Copyright 2008 SAE International All rights reserved. No part of this publication ma
3、y be reproduced, stored in a retrieval system or transmitted, in any form or by any means, electronic, mechanical, photocopying, recording, or otherwise, without the prior written permission of SAE. TO PLACE A DOCUMENT ORDER: Tel: 877-606-7323 (inside USA and Canada) Tel: 724-776-4970 (outside USA)
4、Fax: 724-776-0790 Email: CustomerServicesae.org SAE WEB ADDRESS: http:/www.sae.orgJ1973 AUG2008 SURFACEVEHICLESTANDARDIssued 1991-04Revised 2008-08 Superseding J1973 APR1991 Personal WatercraftFlotation RATIONALESAE Personal Watercraft Recommended Practice J1973 was finalized in April 1991. It has b
5、een widely accepted by the Personal Watercraft industry and used as a guide towards standard engineering practice since its inception. It is part of the certification criteria of the National Marine Manufacturers Association Personal Watercraft Certification Program and has become a technical refere
6、nce within ISO 13590 Personal Watercraft Construction and System Installation Requirements. As a result of this activity, the Recommended Practice classification of this SAE Technical Report can be upgraded to the Standard level. 1. SCOPE This SAE Standard applies to personal watercraft as defined i
7、n Section 3. 1.1 Purpose This document specifies guidelines for determining flotation performance for personal watercraft. It is intended as a guide toward standard practice and is subject to change to keep pace with experience and technical advances. 2. REFERENCES 2.1 Applicable Publications The fo
8、llowing publications form a part of this specification to the extent specified herein. 2.1.1 ANSI Publications Available from ANSI, 25 West 43rd Street, New York, NY 10036-8002, Tel: 212-642-4900, www.ansi.org.ANSI D 471 Test Method for Rubber PropertyEffect of Liquids ANSI D 2842 Test Method for Wa
9、ter Absorption of Ridged Cellular Plastics SAE J1973 Revised AUG2008 - 2 -2.1.2 Government Publications Available from the United States Government Printing Office, 732 North Capitol Street, NW, Washington, DC 20401, Tel: 202-512-0000, www.gpoaccess.gov.33CFR Part 183 Subparts C and F Boats and Asso
10、ciated Equipment 3. DEFINITIONS 3.1 ASTM American Society for Testing and Materials. 3.2 Bilge The area in the watercraft below a height of 100 mm (4 in) measured from the lowest point in the watercraft, where liquid can collect when the watercraft is in its static floating position, except engine r
11、ooms. 3.3 Connected Allowing a flow of water in excess of 4.1 mL (one-quarter fluid ounce) per hour from the engine room bilge into any other compartment with a 300 mm (12 in) head of water on the engine room side of the bulkhead. 3.4 Engine Room Bilge The area in the engine room or a connected comp
12、artment below a height of 300 mm (12 in) measured from the lowest point where liquid can collect when the watercraft is in its static floating position. 3.5 Engine Room The compartment where the engine is permanently installed. 3.6 Personal Watercraft A vessel less than 4 m (13 ft) in length which u
13、ses an internal combustion engine powering a water jet pump as its primary source of propulsion, and is designed to be operated by a person or persons sitting, standing, or kneeling on rather than within the confines of a hull. 3.7 Sealed Compartment An enclosure that can resist an exterior water le
14、vel of 300 mm (12 in) measured from the lowest point where liquid can collect in an adjacent compartment when the watercraft is in its static floating position without seepage of more than 4.1 mL (one-quarter fluid ounce) per hour. 4. FLOTATION TEST 4.1 Test Conditions 4.1.1 Each personal watercraft
15、 shall be loaded with its permanent appurtenances or with weight equivalent to its permanent appurtenances. SAE J1973 Revised AUG2008 - 3 -4.1.2 Fuel and/or oil tanks shall be full. 4.1.3 An additional iron weight of 10 kg (22 lb) shall be added for each person that the personal watercraft is rated
16、to carry. The additional weight shall be secured to a portion of the watercraft that will be submerged during the test. 4.2 Test Procedure 4.2.1 The watercraft shall be swamped, allowing calm, fresh water to flow between the inside and outside of the watercraft, either over the sides, through a hull
17、 opening, or both. Entrapped air in the flooded portion of the watercraft must be eliminated. 4.2.2 If air chambers are used to provide flotation on the watercraft, water shall flood the two largest air chambers and all chambers integral with the hull. 4.3 Acceptance Level 4.3.1 The watercraft shall
18、 have enough flotation to keep a portion of the watercraft above the surface of the water when it has been submerged for at least 18 h. 5. FLOTATION MATERIAL 5.1 Flotation materials shall meet the requirements in 5.2 through 5.9 as listed in Table 1 when used in the: (a) engine room bilge, (b) engin
19、e room, or (c) bilge, unless located in a sealed compartment. 5.2 Vapor Test The flotation material shall not reduce in buoyant force more than 5% after being immersed in a fully saturated gasoline vapor atmosphere for 30 days at a minimum temperature of 38 C. 5.3 24-hour Gasoline Test The flotation
20、 material shall not reduce in buoyant force more than 5% after being immersed for 24 h at 23 C 2 C in reference fuel B of ASTM D 471. 5.4 30-day Gasoline Test The flotation material shall not reduce in buoyant force more than 5% after being immersed for 30 days at 23 C 2 C in reference fuel B of AST
21、M D 471. TABLE 1 - FLOTATION PERFORMANCE TESTS Test Section (5) Area(See Section 3) engine-roombilgeArea (See Section 3) engine room unless open to atmosphere(1)Area(See Section 3) bilge5.2 Vapor Test X 5.3 24-hour Gasoline Test X 5.4 30-day Gasoline Test X 5.5 24-hour Oil Test X 5.6 30-day Oil Test
22、 X 5.7 24-hour Bilge Cleaner Test X 5.8 30-day Bilge Cleaner Test X 1. Open to atmosphere“ means a compartment that has at least 100 cm2(15 in2) of open area directly exposed to the atmosphere for each 0.3 m3(1 ft3) of net compartment volume. SAE J1973 Revised AUG2008 - 4 -5.5 24-hour Oil Test The f
23、lotation material shall not reduce in buoyant force more than 5% after being immersed for 24 h at 23 C 2 C in reference oil No. 2 of ASTM D 471. 5.6 30-day Oil Test The flotation material shall not reduce in buoyant force more than 5% after being immersed for 30 days at 23 C 2 C in reference oil No.
24、 2 of ASTM D 471. 5.7 24-hour Bilge Cleaner Test The flotation material shall not reduce in buoyant force more than 5% after being immersed for 24 h at 23 C 2 C in a 5% solution of trisodium phosphate in water. 5.8 30-day Bilge Cleaner Test The flotation material shall not reduce in buoyant force mo
25、re than 5% after being immersed for 30 days at 23 C 2 C in a 5% solution of trisodium phosphate in water. 5.9 The buoyant force reduction in items 5.2 through 5.8 of this section shall be measured in accordance with ASTM D 2842. 6. NOTES 6.1 Marginal Indicia A change bar (I) located in the left marg
26、in is for the convenience of the user in locating areas where technical revisions, not editorial changes, have been made to the previous issue of this document. An (R) symbol to the left of the document title indicates a complete revision of the document, including technical revisions. Change bars and (R) are not used in original publications, nor in documents that contain editorial changes only. PREPARED BY THE SAE PERSONAL WATERCRAFT SUBCOMMITTEE OF THE SAE MARINE TECHNICAL COMMITTEE
