Search Results

Operator fatigue and time-of-day induced variations in cognitive effectiveness can lead to lapses in attention, slowed reactions, and impaired reasoning and decision-making that has been shown to contribute to accidents, incidents and errors in a host of industrial and military settings. During the past three years, the US Air Force has sponsored the development of a model of human fatigue and circadian variation and a scheduling tool based upon the model that will be used to minimize aircrew fatigue. The initial test version of the tool has passed review by the operational wings of the AF and a final operational product is in advanced development and validation. The software was developed by SAIC and NTI and is called the Fatigue Avoidance Scheduling Tool (FAST™). This fatigue forecasting system is being developed and tested by NTI under a small business innovative research (SBIR) grant from the US Air Force, now in the third year of a three-year program.

The purpose of this paper is to review the development of SAE J2244 by the SAE Fluid Conductors and Connector Technical Committee and to review the changes made to ISO 6149:1980 by the ISO Subcommittee to address the deficiencies which have prevented ISO 6149 from becoming “the International Port” for hydraulic fluid power applications. Because the needs of the global market-place have now been incorporated into SAE J2244 (ISO 6149), a basis will be established for making SAE J2244 (ISO 6149) the preferred port for the 90's, and thus: THE WORLD CLASS PORT & STUD ENDS FOR HIGH PRESSURE HYDRAULICS. SAE J2244 was developed in parallel with the revision of ISO 6149:1980 to provide U.S. users an industry standard for metric, straight thread ports and stud ends. SAE J2244 incorporates the extensive changes made to ISO 6149:1980 to complete its design. Heavy-duty and light-duty stud end dimensions, working pressures, burst pressures, and assembly torques have been developed.