Hexcel datasheets for honeycomb core provide allowables for Compressive Strength (both Bare and Stabilized) and also for Crush strength. The crush strength seems to always be lower than the compressive strength. My understanding is that bare compressive strength is for a core specimen tested by...
I am looking for an oversized fastener to replace a NAS5316, SCREW, SHEAR, 100° FLUSH HEAD, CLOSE SELF-LOCKING AND NON-LOCKING, NAS1800 SIX LOBE RECESS, 95 KSI FSU.
Any ideas where I could find that?
FAR 25.393 specifies that "Control surfaces and supporting hinge brackets must be designed for inertia loads acting parallel to the hinge line." A load of 12G (18G Ultimate) is given for horizontal surfaces.
I'm trying to determine if this requirement should be applied to the wing flaps. Is the...
Many of the Materials and Process engineers at Lockheed don't believe the 60% strength after welding either. When I tried to use it I was told it was not an acceptable reference.
I believe that Boeing Design Manual (BDM-6520, Figure 4-8) has the interaction curves you are looking for. Interestingly the EXACT same figure can be found in the Bombardier Strength Manual which leads me to believe that they must have copied it from some publicly available document. Does...
I've been given the assignment to revise the structural analysis for a large equipment tray installation. The documentation left by the previous engineer was extremely lacking and contained several errors. I told my boss the only way I could do it was to re-do pretty much everything. After...
I am reviewing a doubler installation that was originally to use (23) 5/32" MS20470AD protruding head rivets. Because of clearence issues and edge distances a couple of the rivets have been changed to flush heads and a couple more have been reduced in size to 1/8" . I know that you shouldn't...
