Suggestion for which Arduino board for micro RC jet project

I’m still new to Arduino and don’t know it’s full capabilities yet. I currently own the Arduino Uno which is physically too big for my project, hence the search for the smallest yet most capable version for my application.

My overall sized plane will be around 100 grams or so at the current design. Unfortunately they don’t list weights of the boards themselves so it’s hard to judge just by looking at the pictures.

Also how many devices can the Arduino control? Baozhu responded back that it should work with all the motors I’m looking to control. It will either be 9 or 10 devices in total.