Reddit reviews Hobbypower A2212 1000kv Brushless Motor + 30a ESC for Multicopter 450 X525 Quadcopter

If I were looking for similar, I'd start digging into RC plane/car brushless motors. You'd need a basic motor and a speed controller. Something like an A2212 with a 30A speed controller (both available cheaper overseas...) will easily meet your needs. The speed will be controlled using PWM into the speed controller. Based on test data floating the internet for that particular motor, it'll happily do 6000-9000 RPM under normal propeller load - not sure what exactly you need to do.

> Judging by the fact that hardly any product page mentions the motors' RPM I'm guessing I'm probably doing it wrong, so suggestions and corrections are welcome.

Motors aren't sold by RPM. RPM actually depends on the voltage applied, plus some penalty for the load they're under. You'll usually get some combined rating. Brushless motors, anyway, will come with a "Kv" rating based on their theoretical max speed. The rule of thumb in the hobby world is

Motor RPM = (drive voltage) x Motor kV Rating * (efficiency%)

So assuming a 3 cell lithium pack (11.1v), a 1000Kv motor will give you ~11,100 RPM. You usually have to tack an efficiency multiplier onto that. The rule of thumb in the RC world is ~80% for a propeller (and it varies quite a bit by prop, honestly...) , but an unloaded motor might be as high as 95%.

I'm sure there's more precise math out there for this, but this is the "close enough" stuff you're going to find for hobbyist motors.

Brushed motors are a little different - you won't find a Kv rating. They'll usually have an RPM/volt rating, or a "turns" rating that can be converted. Pick the voltage you're driving them at, multiply by the RPM/Volt, and you'll get a theoretical max. But again, load will be a factor. As will heat. Usually if you kill a brushed motor, it's due to over-heating. Check their max dissipation, make sure they'll handle the voltage you need to throw at them to get the speed you want.

In RC applications, you may have a motor running in excess of 20,000 RPM with a gear system to reduce speed to something usable. Usually you'll find a wattage rating.

Ah I see. I'll purchase these then.

Apologies for not upvoting.

I have some idea. So far I have this battery these motors/esc and this BEC I need a flight controller as well. And I want to use my iPad mini as a controller. Would you know how I would do that?

Thank you