Hi,

I have multiwii 2.3 running on my x quad. One weird problem is that, after arming and when increasing throttle, the rear left motor seems to be less sensitive. Also, when throttle is increased to max of 1600, the rpm of rear left motor decreases gradually to minimum throttle 1150. How to fix this?

Screenshot is attached below

Calibrate/ trim radio.

i did that. i was able to fly it at height.

thanks

From your multiwii  pic it is clear that you haven't calibrated the roll of your transmitter.

First set it to 1500 approx or change the midrc value in the codes to actual value that you are getting from your rx.

It will let you to tame the quad easily in the acro mode.