ORIGINAL: rcpattern
Colin,
You wont see a significant fuel reduction until you start running lower oil content fuel. When the percentage of actual burnable fuel goes up as the oil content goes down you will be able to really lean the needle. While you can lean the needle some because the CDI is more efficient there is still a lot of oil that isn't getting burnt. When running the heli fuel you are going to have a good smoke trail no matter how lean you go on the needle until it is too lean. I can get about 10-11 minutes on a 16oz tank running 30% LS. Changing to the LS fuel definitely helped with this as it wasn't quite as good with that standard Cool Power Heli. When i ran the lower oil content fuel I was able to get that up to 13-14 minutes, but I didn't like running the engine with that little lubricant.
You wont see a major current reduction just by going to the CDI. The engine will run a little smoother, but it still shakes. The AR70 is a good mount, but it doesn't work as well as the AR85 obviously. With my CDI through the RX I'm using about 225-250 mah per 10 minute flight, so you really arent that far off as I would be around 750-800mah for 35 minutes of flying.
Arch
Archie,
I think you are running Ed's IBEC in your YS CDI. If you run a 2 cell lipo in your airborne, can you tell me how low you run the battery before you call it a day?
I stop flying when the Lipo gets to 7.5 volts using a 2S2P 1780 mah Radical RC battery (different engine set-up than YS CDI as you know). That's about 80 minutes of flying to get the battery to 7.5 V (4, 20 min flights). Where do folks tend to stop flying for the day on your set-ups that use IBECs?