Just an informational note. A 123 batteries are now available in 2.500 mAh capacities. They are not limited to 1,100 and 2,300. I have a pair of the 2,500's in my Yak, and a pair of 2,300's in my Edge. Available from Wild Hare.

True A 123 batteries have burst amperage abiity up to 60 amps. Our servo connectors max out and melt above 4 amps. Pluuging both battery leads into a wye in oder to use a single receiver port assures that you have the abiloity to melt a connector. It's not likely you will ever have a mogambo amperage burst but a poor linkage installation could cause it to happen. Why set up for disaster? You do not have to use both power leads from an A 123 battery, but it's pretty nice to have the amperage available if ever needed. The receiver can handle the amperage and the voltage is only 6.6v. All the servos and the receiver can easily handle 6.6v unregulated.

AMA engine kills requirements are similar to those of the IMAA. You must have a means of killing the engine from the transmitter, in addition to some other type of kill switch on the plane. They made those rules somewhat vague, but what it boils down to is that the electronic ignition slide swith counts as a plane mounted kill switch and the transmitter kill can be the usual and simple throttle/idle cut off. A couple of "special interest" competiton categories require a choke or isolated type kill switch in addition to the first two noted.

Flaminheli,

Your electrical installation should not be any more involved that it would be with a basic glow aircraft. The only differences are as follows. The engine has it's own electrical system for the ignition. It consists of a single separate switch, a small ignition battery, and the ignition unit. All of those components are dedicated to each other and not shared by the flight system.

The flight system consists of one or two switches. Single switch for single battery, two switches if two batteries are used. Battery plugs into the switch, switch plugs into the receiver along with the servos, just like a glow system. If you use A 123's you just have 1 more battery lead.

If you elect to use smoke the option is there to power the smoke pump through the flight battery or with a separate battery dedicated to the smoke system. The separate battery is a little more weight but greatly reduces the chance of 9interfering with the flight systme while extending flight time.