And so to my question …

[bj]

Hello ..... Started looking at drones 18 months ago with an Ares Ethos QX130 then moved on to build my own 250 sized drones.

Drone #1 was basically a kit of parts and was unsuccessful so has been modified substantially but still has the same problem in that motor #2 will only run a ¼ speed. Changed everything but the Tx memory channel but this is ongoing and will get solved eventually.

Drone #2 was almost identical to #1 but used Mystery 2206 motors instead of RHD 2206 and 30A SimonK ESC instead of 12A SimonK';s. This drone flies beautifully .......
Both use Matek distribution boards. Tx/Rx is FlySky I6 and control board for both is CC3D Revolution and programmed using LibrePilot
Drone #2 is running 5045 5 blade props with about 10 minutes flight time using 2200MAh 3S Lipo battery

And so to my question ......
Whilst I fully understand the concept of propellors for radio control boat boat versus engine/motor size I have found nothing that explains prop diameters, pitch and blade count for drones.
Is there such a chart to show the choice of prop diameter, pitch and blade count against motor diameter/length?

[Bad Raven]

A motors ability to power a prop depends upon its windings. While pretty obviously the larger the motor, the more windings can be installed, so crudely the more power available, it also matters what current capacity those windings have in terms of conductor cross section size and number of turns.

There is for example a range of motors that for the same size case go from 1000kV to 3500kV. This number is the amount of revolutions per volt applied under NO LOAD. With planes you';d use the 3500 for a ducted fan drive at high revs, the 1000 for a scale plane with a lot more weight to pull and a slower speed requirement.

In MR terms, the lower the kV the greater the lift power, which in turn would (relatively) need a larger slower revving prop. The higher the kV the less the torque but at the higher speed it can spin a prop that does not overload it for a livelier agile performance.

With a sports MR you often start from a different base, how physically large do you want it to be, how heavy will it be, this partly down to flight duration required and therefore battery weight, and the frame';s arm length results in a max prop diameter that frame size will swing.  You then may only have a very few pitch options available to match the load to a motor.

IMO aAny "chart" is likely to be extremely generic, its mostly experience and testing!