Guy's,
I decided to go ahead and try the recommended set-up with the Hacker A50-16S and I flew it today for the first time. The airplane flies absolutely perfect for what I was wanting it for, Pattern practice. All up weight with 3700 mah 6S pack is 6Lbs. even. I had my timer set for 7 minutes, which let me fly the intermediate seqence with a couple of minutes to spare. The batteries had plenty of juice left in them, so I think they could go 8-9 minutes easy. Most of the seqence was flown at half throttle with extra power added on the up lines. I'm very happy with this airplane!!! RS