I wanna build the Mighty mini arrow from flight test. I know I can look in their store I just wanted to hear if there was a rule of thumb I could use if I wanted to design my own models in the future.
A lot of it depends on size of the plane, weight of the plane, what power source you're going to use (2S, 3S, 4S, etc.) and prop size, all of which affect the other factors of size of plane, weight of plane, what power source, etc.
For example:
Let's say I build a generic Versa Wing. I have used an 1100kv A2212 motor for them before. It flies well with a 3S battery and an 8x8 two blade pusher prop; however, it's not necessarily the only solution. There are guys in my club who run the same Versa Wing with a 3S battery, but they'll fly with a 2200kv motor (I want to say a 2205 or 2210?) with a 6x3 two blade prop, and get a little bit better performance, albeit with a little less flight time than I get on my setup. Different setups, different motors, similar performance.
My best recommendation is to try using something like eCalc to help you narrow down performance stats. Worth the money, IMHO!