Motor making high pitched whine ??

[Simon Bee]

Recently my Flightline 1600 Spitfire tipped on its nose at high revs during takeoff.
When I next powered it up, there was a knocking noise at high revs so I assumed the motor was screwed.
Ive replaced the motor but it now makes a very high pitched whine when running and it’s very underpowered. So much so that I nearly stalled the aircraft on take off.
As it’s a new motor, am I correct in now assuming that it must be the ESC ? I’ve bought a programmer but there’s no way to set the ESC to defaults. I’ve messed around with timings but that doesn’t seem to cure it.
Hope it doesn’t mean a new ESC as well !

[AlexisCMcKamey]

Recently my Flightline 1600 Spitfire tipped on its nose at high revs during takeoff.
When I next powered it up, there was a knocking noise at high revs so I assumed the motor was screwed.
Ive replaced the motor but it now makes a very high pitched whine when running and it’s very underpowered. So much so that I nearly stalled the aircraft on take off.
As it’s a new motor, am I correct in now assuming that it must be the ESC ? I’ve bought a programmer but there’s no way to set the ESC to defaults. I’ve messed around with timings but that doesn’t seem to cure it.
Hope it doesn’t mean a new ESC as well !

Here's a tip that I've had success with: try checking the ESC's connections and settings; if necessary, consider resetting it to default or replacing it if there's no improvement.

[equableinsane]

Try examining the ESC's connections and settings; if nothing works, consider resetting it to default or replacing it.

[xviper]

Hmmmm, this is a nearly 3 year old thread. The original poster has clearly stated that he is unable to reset the ESC to default and yet, the 2 subsequent posters tells him to reset to default. It's almost like these 2 AI generated responses have no clue what to post. AlexisCMcKamey has not posted in over 2 months - user put here to be used later for SPAM?
equableinsane - setting us up for something later, too? We'll just wait and watch.