Had this snag with my Graupner Graf Spee as well. in my case the stbd prop tube
was misaligned 😲 Major surgery 😡
First off; it's unlikely that the motor
s are perfectly matched, but if the difference is that noticeable I would suspect the cause lies in propshaft
resistance and / or dry motor bearings
I would disconnect the prop shaft
s, oil the motor bearings
and run them in a bit off load for a few a minutes. See if you notice a difference there at low speeds.
Also; remove both shafts; clean and oil. Clean the tube end bearings
with a pipe cleaner and some light machine
Squirt some Teflon grease into the tube from the prop end. I use a small plastic syringe for that.
Before reassembly check as far as possible that neither shaft or tube is bent at all🤔
If all seems straight reassemble and run the motor
s at medium speed a minute or two then slowly and see if you can still detect a difference.
Reduce the throttle gradually until the motor
s stop. if one stops significantly before the other that suggests extra friction in that drive train; misalignment somewhere! Thrust washers too tight?
BTW: which motor
s? One ESC or two?
Hope this helps!
Cheers, Doug 😎