thomasshields

GOT BAD INTERFERENCE WITH ENGINE AT SLOW SPEED MAKES ELEV. RUDDER, AND ALIRONS SHAKE UP DOWN BACK AND FORTH. WHEN ENGINE STOPS PROBLEM GOES AWAY. IV USED JR 72 MH WITH 8103 SPECTRUM 2.4 WITH R7000 FUTABA 4 CHANNEL SAME PROBLEM WITH ALL THESE. MOTOR IS IN A YAK 54 25 % ANYBODY NO OF SOME TYPW OF FILTERS I COULD USE ON THE IGNITION IVE HAD THIS PROBLEM SINCE I BOUTHT THIS PLANE USED AND STARTING TO GET TIRED OF FOOLING WITH IT ABOUT READY TO PART IT OUT

Bax

My Feedback: (11)

If it only happens at low speed, you likely don't have ignition interference. Ignition interference would happen at all RPM levels. We'd suggest that the difficulty may be located elsewhere. However, you can send the engine to the service center to be checked out. If the ignition system is bad, the warranty should cover it.

larry@coyotenet

My Feedback: (21)

Biggest problem with ei engines is that lots of guys won't put enough distance between the ignition and the radio. A good rule of thumb is 10-12 inches between anything attached to the engine and anything attached to the radio. This includes switches, batteries, leads, servos
etc. The thing that constantly causes problems is that you may get away with it for a while before it bites your behind. Seen it happen again and again. Different ignitions and even different individual units of the same ignition act differently. Another common problem I have seen in aerobatic type planes is the use of metal push pull wires with the radio antenna running in line and parallel to the wires.
Again, you may get away with it for awhile but!!!

Larry

mrbigg

My Feedback: (21)

Did you check for loose bolts with washers that could be vibrating and causing glitches?

thomasshields

no loose bolts but does seem to virbrate prop may be out of bal