Atul,

I have been using a Fromeco 2600 mAh Relion through a Radio South regulator, regulated down to 5.1v.

In my airplane, I've got 3 8411SA's, 2 9411SA's, and a 368, and I'm seeing about 225-250 mAh per flight with the ignition running through the receiver. I've flown four flights on a pack with no issues, and I'm not too keen on flying much past that anyway on a pack regardless of type. I'm pretty sure Richard Verano has run these motors on an unregulated 5 cell NiCd, so that would mean that it sees more than 6v for a while and hasn't said anything negative about it. In fact, I believe that was his preferred setup. I just bought a Tech-Aero regulator and they come from the factory preset to 6.2v and will be using it with a Thunder Power 2200 mAh LiPo, so I doubt there will be an issue there. Like I said, I've got 35 flights on the motor so far, and no issues. It's been a dream. It's the cleanest, smoothest running motor I've ever had.

I also highly reccomend, and can't stress enough putting a switch in between your receiver and the igniton. It's very helpful for priming the motor, and it's also an added safety factor. I've got a micro JR switch harness for mine, and actually cut off one of the leads that you would use for a charge lead as it's not needed. That swich doesn't weigh much at all, and it's cheap insurance. I don't think I've seen a gas motor without an ignition switch, and this should be treated no differently- it's a very powerful motor.

I have been lazy and have not tached the motor, but I'm running Coolpower 20% heli in it right now, and it will swing a 19x11 with no trouble so far. It's been around 70 degrees when I've flown it, and I'm about 820 feet elevation at my home field. I will get a tach reading on it soon, as I would like to compare numbers with guys running 30%. It's also my understanding that your needle will stay in its normal range unless you're using low oil fuel. My needle is one click over 1 3/4 turn out, and I the last time I flew it I could tell that it needed to be leaned a little more as it's probably close to being broken in.

If you have any more questions, please let me know. If I don't know the answer offhand, I'll find out for you.