ian51291

Im changing my NiMH's for 2's Lipos for the ignition for my gas engines running them through a regulator,can anyone tell me what mAH i should be looking at.

Cheers

Ian

av8tor1977

My Feedback: (6)

For RCEXL or CH ignition, around 300 mah at full throttle for a single.

AV8TOR

MTK

Ian,

I think you are asking how much capacity you will need for an average day's flying. Suggest you use at least 1000 mah capacity pack if only for ignition. That will allow you at least 90 minutes of flying.

If you decide to use an IBEC which allows driving both the radio and ignition from a single battery, then you should use at least 1800 mah capacity and 2200 gives more margin. I use either an 1800 or a 2200, regulated down to 6.3V. The IBEC is driven from the same battery. Voltage output to the CDI is regulated further down to 5.5V by the IBEC (Tech Aero). The 1800 gives me 75 min of flying while the 2200 gives me 90 minutes+, with the LiPo reading around 7.5 volts after the session....comfortable margin

ian51291

Hi guys,thanks for the info,yes i did mean the capacity of the batterie.it will be just for the ignition so i will go for a 1500mAH

Thanks

Ian

earlwb

Some CDI units draw around 650ma at WOT but at idle maybe 300ma or so. So a battery pack in the range of 1500mah to 2500 mah should be quite fine. If you do a lot of flying you either need to recharge at the flying field or use a larger capacity battery pack.  Of course the plane's size and weight is a factor too. I managed to fly enough a while back to run down a 2000mah on my gas engine powered plane.