From: email@example.com (Greg Wright) Organization: Boeing Date: 08 Jul 93 01:28:00 PDT References: 1
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In article <airliners.1993.490@ohare.Chicago.COM> firstname.lastname@example.org (Robert Dorsett) writes: >It does contain an interesting note, though, that Airbus apparently doesn't >believe in "break-away" engines (the fuse pins installed on Boeing airplanes >are there to permit the engine to shear away following substantial engine >vibration, on the theory that it's better to drop an engine than risk damage >to the airframe or wing). "If an Airbus crash-lands, the plane can even skid >on its engines without their falling off." The main reason for the "Break-Away" engines was to keep the engines from rupturing the fuel cells in the wing in the event of a crash landing. >An issue of Aviation Week & Space Technology reported earlier this year that >Boeing had found the problem was that Boeing had underestimated shear forces >in one part of the assembly by 1000% or so. It wasn't really underestimated, more like we found 'hidden' forces. In a new FE analysis of the part on a new generation of computers it was found that there existed very small areas of very high forces. In the past it was to computationally intensive to find these. -- ________Greg Wright________ OS2 2.1!!!! High Lift Development | email@example.com | Falcon 3.0 747/767 Aerodynamics | firstname.lastname@example.org | |__uunet!bcstec!gregory_____| NOT A BOEING SPOKESPERSON.