ORIGINAL: checksix
ORIGINAL: rgreen24
Alright guys, went to the field today to fly, so I fgure that I would charge before I left home. I use the 1010 C charger and 10S 3850 batts. To my horror, when I was charging the first set I put 3700[:@] back in the pack. I did not push the motor at all and when though the Advanced sequence once and landed. What the Hell. I am sure my flying style is not that hard on the Batts, any thoughts on my dilemna? I am very dissapointed with this result. Still went and flew, and the batts seem to do fine.
Sounds in the ball park.
That's about what I was getting last year flying the advanced sequence with my Brio.
AXI 5330/18 (not the F3A version)
APC 15.75X13 3 blade
CC 110HV
TP5300 10s
10.9 lbs
---Derek
Edit: I went back over my notes and see that I typically use 3300-4000 on 8 minute practice flights and 2400-3000 on 6 minute contest flights, depending on the amount of wind and pilot excitement level. So yes, perhaps you might be leaning on the throttle a bit too much. On my Brio, at least, there seems to be a sweet spot where you can keep the momentum going, but reserving full throttle only for uplines. The last 1/4 throttle seems to make a big difference on battery temps/consumption but little difference on speed.
I agree, there seems to be a range of throttle settings that maintain good speed without drawing as much current. I can fly the P07 sequence (APC 21x13) with good speed and nice maneuver size at about 3500 mah if I keep the throttle at the bottom range of the 'good speed' settings. Or I can use 4200 if I leave the throttle at a higher setting thru out the flight. And there isn't much difference in the speed and vertical performance. Seems that there is a sweet spot for each prop configuration.
I have flattened the mid range throttle curve so that small changes in throttle stick position create very little change in amp draw. I know, I have used the radio programming to compensate for what I should be able to do manually, but it works easier this way.
Something that might help find that sweet spot, is to reduce your throttle ATV until you notice a reduction in overall power then bump it up just a little and you will probably find the last 20% or so of your throttle movement doesn't create any noticeable increase in vertical power or horizontal speed. However, it will still increase amp draw. Might take a little playing with your throttle curve to find the right 'feel' for your particular style flying.
Flying electric has a pretty steep learning curve with it but the nice thing is, it is easy to experiment with power setting and the results just by changing your radio settings. Something else I would recommend is getting is some type watt meter or logging device to fly in the plane just so you can see the max amps during a flight. I use the WattsUp meter and like it for instantaneous readings and it will record max current, minimum voltage, etc. Recently, I have started using the EagleTree MicroLogger and it is very useful to see the affect of props on current, rpm and battery voltages and temps. If you haven't seen the results of a logged flight, I attached a chart from one of my test flights.
Don