Haven't seen a lot of physics talk going on so I thought I'd start a thread. Might be too early in development for this but I'm going to do it anyway. I'm going to break this up into separate posts because there's a lot to account for here. There's some discussion going on between the posts so just skip through and find my numbered and titles posts to see the full info in one place.
1: Investigating gravity and other values
In the video on atmospheric flight we can see certain values, given to us or expressed as variables, specific to the vessel and the environment: