>so even a percentage point increase in engine efficiency is huge.

I interviewed with Boeing out of school many moons ago. To be precise, they offered me a job in response to my mailing them my resume. (In an envelope with a stamp on it; this was a while ago.) But I asked to come out to talk to people.

Did get me the opportunity for a plant tour in Everett (?) if I remember.

Anyway, the engineer who took me out to dinner talked about his project for the past couple of years--some fuel system design of an upcoming design that saved something like a fraction of a percent fuel consumption.

I decided the job didn't sound very appealing.