[tothemax]

Hi everyone,
I was flying my UM J-3 Cub from parkzone the other day, when suddenly the plane started gliding down even though i was holding the throttle on full. when it landed, i held the plane and turned the throttle up. the prop started spinning and then it would stop and go, and the actions of the controls were delayed. now, it may sound like i had a dead battery, but i tried out my other two, fully charged batteries with the same results. i opened up the front of the plane to take a look inside, and could see nothing visually wrong. a side note; when i held the throttle at half, the prop seemed to be pulsing and the same thing with the elevator and rudder.

does anyone know what the problem could be? any suggestiopns are greatly appreciated.

Thank You