Hornet....lots of the old world design/engineering metrics are lost in the computer based designs today
All if us scientists coined them (the summer interns from the likes of Harvard, MIT, Stanford, Cal, Purdue, etc, etc...fav's were from small/no-name colleges). "Green Light/Red Light" designers....they just run the simulation and then address the vectors their computer says to...
'Some' knew what the tensile strength of their CAD recommended/choices materials...ask them how does that attain 140,000 PSI...most didn't know. Worst was their lack of understanding that their super computer recommendation has many GB's of data and that buried in there is a heat treatment cycle(s) required to attain that 140,000 PSI
Lost was the old: "design it for the idiot and gorilla, for if they can misuse it...they will" point of view...factored by writing the fine print (must be reviewed, modified and approved by lawyers) underneath all specifications...CYA for the OEM
Buried in there is the legal position of 'recommended'...that many here say is worthless. Yup...to them, but to the lawyers a positioning word
Also lost to the public, as the CAD systems does dial in safety margin. The Green Light and Red Light designers many times don't know....that management some times dial back the level of safety margin(s)
Nephew is in college studying to become a ME. His materials classes does NOT cover the levels of detail mine did +50 years ago. Asked why and stated that the CAD/supercomputer will deal with it...
Fatigue analysis of their designs are no longer done by the designer. It is buried in their simulations and output vectors...