Statics Challenge: Original vs. Improved Design of Early Boeing 747 Engine Mount
Explore the structural differences in the statics of early Boeing 747 engine mounts, focusing on weight, maneuver loads, and design improvements. Join us for a precision engineering center lunch seminar on March 4, 2011.
Statics Challenge: Original vs. Improved Design of Early Boeing 747 Engine Mount
E N D
Presentation Transcript
Statics Challenge J. W. Eischen Precision Engineering Center Lunch Seminar March 4, 2011
Original Design- statics floating mount - weight and maneuver loads single thrust mount Rf Hr Rr d (turbine case offset) T L causes ovalization
Original Design- statics Rf Hr Rr d M T L
Early Boeing 747 Engine Mount Issue 34- load pickup member 66- pin 44- thrust block 46,48- mount rails 50,52- slider blocks 62,64- holes
Improved Design- statics floating mount - weight and maneuver loads Rt axial sliding mount Rf d(1-cos(60)) Rr a dcos(60) T L
Improved Design- statics Rt Rf d(1-cos(60)) Rr a dcos(60) M T L bending moment reduced 50%
