The xcopterCalc has limited ‘demo’ (free) functionality – in other words full functionality does cost money – but this may greatly assist multicopter and multirotor flyers and designers with their initial calculations:
This Multicoper Calculator supports you in choosing an adequate motor setup for your electric RC Multicopter with fixed pitch Propellers. it is suitable for flat and coax configurations.
Always define the frame size first – then the propulsion with eCalc and use the largest possible propeller diameter.
Make a robot friend with Adafruit’s CRICKIT – A Creative Robotics & Interactive Construction Kit. It’s an add-on to our popular Circuit Playground Express, FEATHER and other platforms to make and program robots with CircuitPython, MakeCode, and Arduino. Start controlling motors, servos, solenoids. You also get signal pins, capacitive touch sensors, a NeoPixel driver and amplified speaker output. It complements & extends your boards so you can still use all the goodies on the microcontroller, now you have a robotics playground as well.