Some questions about QAC 250 build

 

These are my quad build parts:
Power Supply:
Gens Ace LiPo Battery: 2200mAh 3S 25c Lipo,
Assumption: 2.2*25 = 55 Amps Max Draw


Power Demand:
4 Tattu 2305 2450kV Brushless Motors with CrazePony 5030 Propellers
Assumption: 7.2 (Peak Current) * 4 (Number of Motors) = 28.8 Amps

ESC's used: 

Turnigy MultiStar 10A BLHeli S Rev 16 ESC 2~4S V3 (Opto) - 3
TURNIGY Plush 10amp Speed Controller w/BEC - 1
Assumption: 10 A * 4 = 40 Amps
My ESC's can handle the current draw from Motors at 100% Throttle. 

Total = 28.8 Amps (Is this correct ?)

I did the Math and the total weight of all my components comes to around ~550gms
Peak Thrust from each motors per spec ~ 370 (Total Thrust ~ 1480)



1. Am I missing something here ?
2. Any suggestions on how I can calculate my expected Flight time ?

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