The question is very wide ranging,
some workshop manual can be named as " How to test RC motors ?"
Can you clarify your question...
RC motor = all types of electric motors for radio controlled devices in land or general use
ARC motor = all types of electric motors for radio controlled devices in air
RC engine = all types of combustion or jet engines for radio controlled devices in land or general use
ARC engine = all types of combustion or jet engines for radio controlled devices in air
RC servo = all types of electric servo systems for radio controlled devices or general use
RC motor types
-- brush type RC motor
-- brushless RC motor
---- Inrunner and the Outrunner motor.
RC motor tests and measurements
-- rpm ( function of current and voltage )......calculate the KV.
-- torque ( function of current and voltage )
-- calculate current consumption ( function of load )
-- tuning
-- etc...
RC motor power transmission and gearbox tests and measurements
-- calculate and test values for acceleration / deceleration
-- find step response
-- tuning
-- etc..
RC motor power driver unit (speed controller) tests and measurements
-- as above
RC controller unit tests and measurements
-- step response
-- operating range
-- etc...
Tests and measurements to find and locate faults , fails and failures
KAK