I really want to thank everyone who helped me with everything from tabstops to trig. With your help, I got the basic (very basic) flight modeling in to my game, which simulates our rough-n-tumble solar system in 2075. If you liked how ships worked in The Expanse, you might really enjoy this.
More, much more, to come.
https://textadventures.co.uk/games/view/7puxth7faucpp77brz-r5g/solar-trader-2