"Hi marcoi have a problem with the motor...when i arm the motors and give it some throttle it starts spin but one of the motors going to decreased and finally stops,also i heard some strange noise from it...whats the problem?"

"hi jasonthanks for the simwhen i was working with your sim some questions constantly was crossing in my mind...1.why didn't you use prop size and the size of motor to motor and another things...i think if you use these stuff it will be very…"

"hi marcoyou mean for automatic RTL after loose connection,the failsafe must activate?"

"hi georgcould you please give us some information about your arducopter such as what motor,prop and Also wight...?is alt hold works with these parameters?"

"hi grahamdid you get GPS lock before check it out?if you didn't get GPS lock it would show you stabilize even you set another mode..."

"hii put Rate P=0.135 and Rate D= 0.004, Stab P and I are as default (4.5 & 0.1) but as you can see here in the pic it shows me this output for Pitch which has +/- 0.5 degree error,what is wrong?"

"hello allthx for your new version...i have a question about the error of the stab mode....i have a test stand,so while i test the quad on it (pitch) and give it throttle to be stable it make up but it starts oscillate between +- 0,5 to 1…"