Want to extend your quadcopter flight times to 30 minutes? Here will tell you a formula to calcuate fligth times.

Calculator Formula

Flight times =(Battery Capacity * Battery Discharge /Average Amp Draw)*60

Battery Capacity: For calculator you have to take the battery’s capacity in amp hours, To convert from mAh to Ah, battery capacity divide by 1000. For instance, 2200mAh/1000=2.2Ah.


Average Amp Draw: You have to know two things, one is about your carrying weight of your quadcopter which include battery weight. An other thing is that Read your motor instructions, you have to know how many amps one motor will be draw to produce 100g of thrust? This is the key points in the calculation of Average Amp Draw.

Battery Discharge: It’s common practice to not discharge your LiPo batteries below 20% mAh during flight; In other words, the effective capacity is only 80% that can be used during flight time.

For instance,

Assume that you have 3s 3300mAh, calculated the average amp draw of quadcopter to be around 20 amps, and making an assumption that 80% of battery capacity will is used, then the quadcopter flight time is 7,92 minutes.



Sources:
1. https://www.flitetest.com/articles/quadcopter-flight-time-calculator-how-to
2. http://www.rcdronegood.com/quadcopter-battery-calculator-flight-times/