Vought S-3A spoiler


This annex of the Rules contains a flowchart identifying the key stages in the audit process from the initial request for certification through to issue of the certificate. Pre-audit is not a documentation audit. Supplier must provide all required data prior to site visit.  [c.75]

Subcontractor/supplier performance will be evident from audit reports, surveillance visit reports, and receipt inspections carried out by you or the third party if one has been employed. You need to examine these documents for evidence that the subcontractor s quality system is controlling the quality of the products and services supplied. You can determine the effectiveness of these controls by periodic review of the subcontractor s performance what some firms call vendor rating . By collecting data on the performance of subcontractors/suppliers over a long period you can measure their effectiveness and rate them on a scale from excellent to poor. In such cases you should measure at least three characteristics quality, delivery, and service. Quality would be measured by the ratio of defective conforming products received delivery would be measured by the number of days early or late and service would be measured by the responsiveness to actions requested by you on scale of excellent to poor. The output of these reviews should be in the form of updates to the list of assessed subcontractors/suppliers.  [c.323]

The next example is a spoiler made by Vought (now Northrop Grumman) for the Lockheed S-3A. The S-3A is a submarine search plane, and the spoiler is a relatively small flap-llke object in the wing. In section A-A through the metal spoiler in Figure 1-32, we see that several machined extrusions are used as stiffeners internal to this structure. The spoiler skin has been chemically milled to change its thickness in various areas. Both machining extrusions and chem-milling are high-cost operations, so the spoiler looks quite simple, but is quite costly.  [c.42]

The original metal spoiler weighs 13 lb (5.9 kg), and the graphite-epoxy with honeycomb-core spoiler weighs less than 8 lb (3.6 kg). Thus, Vought achieved a 41% weight savings. Contrast the high machining and chem-milling costs for the metal spoiler and its high weight with the graphite-epoxy design. Actual costs are not available, but from the weight savings and from the types of machining operations involved, the composite spoiler could be much more cost-effective than the metal spoiler. That conclusion is true even if the graphite-epoxy raw material cost is more than the aluminum cost because we are not comparing the designs based on raw material costs alone. Raw material cost is only the beginning of the true cost story. Fabrication costs can have a very strong, if not dominant, influence on the total cost of the structure.  [c.43]

The next example is a spoiler made by Vought (now Northrop Grumman) for the Lockheed S-3A. The S-3A is a submarine search plane, and the spoiler is a relatively small flap-llke object in the wing. In section A-A through the metal spoiler in Figure 1-32, we see that several machined extrusions are used as stiffeners internal to this structure. The spoiler skin has been chemically milled to change its thickness in various areas. Both machining extrusions and chem-milling are high-cost operations, so the spoiler looks quite simple, but is quite costly.  [c.42]

The original metal spoiler weighs 13 lb (5.9 kg), and the graphite-epoxy with honeycomb-core spoiler weighs less than 8 lb (3.6 kg). Thus, Vought achieved a 41% weight savings. Contrast the high machining and chem-milling costs for the metal spoiler and its high weight with the graphite-epoxy design. Actual costs are not available, but from the weight savings and from the types of machining operations involved, the composite spoiler could be much more cost-effective than the metal spoiler. That conclusion is true even if the graphite-epoxy raw material cost is more than the aluminum cost because we are not comparing the designs based on raw material costs alone. Raw material cost is only the beginning of the true cost story. Fabrication costs can have a very strong, if not dominant, influence on the total cost of the structure.  [c.43]

An unannounced visit from a major supplier coincided with a group training session, which gave the Plant Manager the opportunity to brief him on the division s work in PSM.  [c.156]


See pages that mention the term Vought S-3A spoiler : [c.330]    [c.42]    [c.42]   
See chapters in:

Mechanics of composite materials  -> Vought S-3A spoiler

Machanics of composite materials  -> Vought S-3A spoiler


Mechanics of composite materials (1999) -- [ c.42 ]

Machanics of composite materials (1998) -- [ c.42 ]