Hi everyone, i've set myself the project of using fortran to program a simple spaceflight simulator. Yes I know fortrans old and clunky but it's what i know and it makes things interesting.
I've got as far as earth to LEO and caculating launch windows for simple Hoffman transfer orbits, but I've come up with a blank on how more complex manouvres, such as gravity 'slingshots', are set up and how opportunities for them are found. I was wondering if anyone knew of any online resources, or better yet examples, for older programming languages were used for problems like this back in their day?
I'm mainly interested in the mathematics used, and my calculus is fairly rusty so if anyone wants to recommend a tutorial that would be very welcome to!