[gurps] vehicle challenge

[Anthony Jackson]

Onno Meyer wrote:

> Regarding jet engines, that could be solved by one variant of
> the travel table for internal combustion engines and one for 
> jets and gas turbines. That would keep the rules almost as 
> simple ... and arguably you should not use the table from 
> the _WWII_ book for jet engines, anyway.

Or you could just build a somewhat bigger table that shows thrust 
required as a function of velocity. It's really not that hard, it's just 
'thrust required = k1 * drag * v^2 + k2 * (effective wing area) / v^2'