MIL-STD-2199A
2.3 Non-Government publications. The following documents form a part of this document to the extent specified herein. Unless otherwise specified, the issues of these documents are those cited in the solicitation or contract.
AEROSPACE MATERIAL SPECIFICATIONS (AMS)
SAE-AMS3824 - Cloth, Glass, Finished for Resin Laminates
SAE-AMSC9084 - Cloth, Glass, Finished, for Resin Laminates
(Copies of these documents are available from SAE World Headquarters, 400 Commonwealth Drive, Warrendale, PA 15096-0001 or online at www.sae.org.)
2.4 Order of precedence. In the event of a conflict between the text of this document and the references cited herein, the text of this document takes precedence. Nothing in this document, however, supersedes applicable laws and regulations unless a specific exemption has been obtained.
3. DEFINITIONS AND ACRONYMS
3.1 Definitions.
3.1.1 Abrasive-blasting. Abrasive-blasting is an all-inclusive term for the procedure known as sandblasting. Abrasive materials other than sand are often used and are suitable for shaft surface preparation. Use of sand may not be permitted by some local environmental and safety regulations.
3.1.2 Cure (or curing). The chemical reaction by which thermoset resins change from a liquid to a solid, releasing heat in the process. The resultant mass has characteristic physical properties of a solid. Cure implies more than solidification alone. Cure continues for a period of time after initial solidification and results in the final physical and mechanical properties of the reacted resin.
3.1.3 Elastomeric coating. The second of four layers of the shaft covering system. It is a two-component system, specifically, an epoxy cured with polysulfide that is applied by reaction spray equipment.
3.1.4 Fair. The condition of a flat or curved surface when it is smooth and free of irregularity, unevenness, or abrupt change in curvature. For propulsion shafting, it is the condition in which the sleeve ends blend smoothly into the shaft without abrupt change in thickness.
3.1.5 Glass reinforced plastic (GRP). The fourth of four layers of the shaft covering system that protects the elastomeric components from impact, abrasion, and erosion.
3.1.6 Laminating resin. The mixture of epoxy resin and curing agent used to wet-out the fiberglass fabric in the
GRP.
3.1.7 Peel ply. A nylon or polyester based woven fabric that is used as an expendable surface layer used to produce a prepared surface ready for painting or bonding. The surface of the fabric is not coated with a coupling agent and is removed by the tug of the hand on a loose corner.
3.1.8 Pot life (working life). The length of time that the mixed resin and catalyst is of the workable consistency required for proper application. It is the length of time after the catalyst or hardener has been added, to the point that gelling or thickening of the resin has progressed to the degree it can no longer be applied effectively to the shaft.
3.1.9 Primer. The first of four layers of the shaft covering system. It is a one-component, low-viscosity liquid applied by brush or roller.
3.1.10 Sealing/fairing compound. The third of four layers of the shaft covering system. It is a two-component polysulfide paste applied and distributed with a squeegee to the sleeve end to fair the shaft to the sleeve.
3.1.11 Sleeve. As used herein, a cylindrical tube or band secured to the shaft by shrink-fit and used in way of bearings, coupling covers, and fairwaters.
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