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Old 11-04-2006, 09:17 PM   #1
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Air time HELP

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I am just getting into Electric flying after one year of nitro powered flight and i have one major question... How long can my airplane stay in the air?

I have a speed 600 motor at 8.4V and the battery pack has a capacity of 2100mAh (I think). I would like to fly for as long as possible but i am always worried about losing power during flight. Please help.
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Old 11-05-2006, 08:10 AM   #2
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8.4V could be 2S Lipo or 7cell nicad. Speed 600 might work better with a 3S pack.

Really need more info to answer, but I will make a few assumptions.
If your battery is Lipo and max current about 25A:

Normal flying with some throttle management should be ok for 6 min.

I would suggest:
First flight just take it up for 2 or 3 min. Land and see that nothing is getting too warm. Don't want to overheat the moter, esc, or battery.

Recharge the battery to see how many mAh go back in. You can use this as a guide to increase the flight time of each flight. (Hopefully you have a charger with mAh display.) Do not discharge more than 1800mAh from the pack. You can draw out more but it will shorten it's life.
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Old 11-06-2006, 08:48 AM   #3
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Most speed controllers will, if it shuts off because of the low voltage, will rearm if you bring the throttle all the way down then back up again. just don't put it all the way up to full throttle, or it will shut off again. Half throttle will get you around the patch and down with a power on landing.
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