I improved my EM sensor tech, and the numbers are making more sense now. Thank you Charlie. I also think I can use these numbers to design my missiles with, but that raises another question. How can I know the range and speed of a missile if I haven't designed the engine yet? Do I just need to keep guessing at engine designs till I get one that makes a good missile?
Best quik option is a spreadsheet. Most of the relevent formuli are in the v6 topic in the mechanics section. Engine design completion changed with v6 and that is why the data related to both ship and missile engines can be found there.
There have been a couple of posts referencing a sheet that can be online. I've looked at that sheet and it's a place to start from. Be aware that the rounding for agility msp is incorrect. I shouldn't say incorrect, but does leave msp that could be used elsewhere.
Yes, I have a sheet that I use... but I don't put it out for use for several reasons. Among them is that it uses a direct extract from the game database that I've made some alterations too.