Calculating Run Time
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Calculating Run Time
I am new to the electric side of the hobby but wanted a small fun electric to fly in limited area and make it quick outing unlike taking my glows out. So I got a Hanger 9 Mini Ultra Stick with the following power components. I am trying to figure out how much run time I can get out the bird before I lose it. Any help would be greatly appreciated.
E-Flite Park 400 Outrunner 920Kv
ElectriFly 1250 mAhr 11.1 V LiPo 3 Cell
E-Flite 20-Amp Brushless ESC (V2)
E-Flite Park 400 Outrunner 920Kv
ElectriFly 1250 mAhr 11.1 V LiPo 3 Cell
E-Flite 20-Amp Brushless ESC (V2)
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RE: Calculating Run Time
Waross: You have to know the amp drain on the battery. Here's a link to a flight time computer.
http://www.bphobbies.com/view.asp?id=A0320048&Nav=7
Bob
http://www.bphobbies.com/view.asp?id=A0320048&Nav=7
Bob
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RE: Calculating Run Time
If you would like to calculate it yourself, the formula is:
Current consumption and battery capacity must use the same units of current. It battery capacity is expressed in mAh, then current consumption must be expressed in mA.
Example:
battery capacity is 2000 mAh
power system draws 25A = 25,000mA
2000/25000 x 60 = 4.8 minutes
- Jeff
Current consumption and battery capacity must use the same units of current. It battery capacity is expressed in mAh, then current consumption must be expressed in mA.
Example:
battery capacity is 2000 mAh
power system draws 25A = 25,000mA
2000/25000 x 60 = 4.8 minutes
- Jeff
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RE: Calculating Run Time
Here's yet another online calculator
http://www.missionwings.com/flighttime.asp
Keep in mind though that milliamp ratings listed on the packs themselves are theoretical maximums. I'd be more inclined to say actual flight time is probably 80% of what the calculator gives.
http://www.missionwings.com/flighttime.asp
Keep in mind though that milliamp ratings listed on the packs themselves are theoretical maximums. I'd be more inclined to say actual flight time is probably 80% of what the calculator gives.
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RE: Calculating Run Time
Yes, the calculators and formula provide rough estimates only. They don't account for efficiency, optimistically rated batteries, your LVC setting, etc.
- Jeff
- Jeff
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RE: Calculating Run Time
ORIGINAL: waross
So how do I figure out power drain of the motor...???
So how do I figure out power drain of the motor...???
That said, someone here may be familiar enough with your set-up to estimate the current consumption.
- Jeff