i have 2 falcon 40's,neither will lift off the floor no more than a few inches,they have always flown as high as i wanted to take them until now,i have replaced everything on them including the motor,battery,and receiver,anybody have any idea on what is going on here?

what's your altitude? i know that one of my falcon 40 use was in 7000 ft and the stock battery should not have enough lift but his problem was solved once he used lipo 7.4v

Andy

tha altitude here is 960 ft, the helis have always flown as high as i wanted until the past few days, can a motor be bad and still run but with not enough rpms to fly a heli?

bad batteries, or dying motors is my guess

yes the brushes fromt he motor could be bad. why don't you cycle the battery. Use up all the juice and then charge it for 6 hours and see if this helps.

Andy

i have tried that with all of my batts, can the motor still run if the brushes are bad,because i have tried several different motors as well?

If the brushes are going bad, the motor could draw more current but won't generate the same torque. They will still spin, but possible not as fast or with as much torque.

You said you've tried several motors, are these new motors?

yes,they were supposed to be! i try to keep extra parts on hand.when neither of the 2 motors would help my falcons i ordered a new battery and it performed the same way as my other 5. then i tried another receiver,still no help. sounds like i have 2 bad motors out of stock but the warranty is only 30 days and that is the problem with trying to keep parts like that on hand. i can't remember the order number anyway.
thanks for all your help guys,i guess i will try to order a couple more motors.