What do you want for the 35-year anniversary?

[Anthony]

Originally Posted by Kromm

Physics and engineering calculations. Yeah, yeah . . . wing loading for planes, surface-area effects on watercraft speeds, power curves for anything with an engine, blah, blah, blah all exist. For the big variations, just add archetypes and hide the math. For the small ones, use CF-type modifiers.

I would note that, if you really care about the physics and engineering calculations, you can do both of those things without involving GURPS at all, you only really need to involve yourself with GURPS at the point you're converting the physics and engineering into game statistics.