MaL

The Rxcel ignition units draw between 0.2 to 0.85 amps dependant upon RPM so a 3000mAh li-po should last 3+ hours which makes Rich2's figures in the right ball park and John Smith's battery just fit for the bin (or recycling in this part of the world)!! What are you trying to save by using just one battery for both Rx and ignition? I always use three batteries, two on the Rx, usually smaller capacity than normal, with two switches and duplicated wiring, and one battery on the ignition with a kill switch. It is not interference that is the problem, it is noise that could cause brown outs on your uP in the Rx

Perhaps the most telling comment in the pdf was - 4. Fleetlights technology has been made available as an open source project to allow the entire dev community to introduce the new advancements needed to make the service a reality. -----don't hold your breath--------

I can't see what the servo quality, or lack thereof, have upon the idling of a motor. There is a mechanical stop on all walbro cards (AFAIK) if you adjust it to give a very low tick over when the engine is at operating temperature and use a 'spongy' linkage so the servo, on minimum trim, jambs the throttle arm up against the mechanical stop you will have a motor that will keep going whilst on the landing approach but not provide thrust to prolong the approach. Fit a kill switch to guarantee you can stop the motor at will and use the throttle trim to a high tickover while flying normally. No resolution issues, no throttle linkage disturbance issues, no need for an expensive servo, just a rock steady solution. I can't remember the last time I had a petrol deadstick. I must confess I disable the throttle return spring on all my petrol engines, but am at a loss to explain why, as far as I can see it makes no difference, the chances of the throttle linkage breaking is negligible and the motor can always be stopped by the kill switch and the current taken by the servo fighting the spring would be less than a gnats private tackle.