Suggestions & Advice Welcome: First Quad Build QAV250

[ConfusedMind15]

Hi Everyone,

I am working on my first quad build. I'll need help with understanding a little into my quad amp requirements and supply with the following parts.

Power Supply:
Turnigy LiPo Battery: 2200mAh (45C-90C)
Assumption: 2.2*45 = 99 Amps Max Draw


Power Demand:
4 Arris MT1806-2300kV DC 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 ?

 

[Diven]

Have you flight it ?

 

[ConfusedMind15]

I haven't tested it yet. Just trying to get an idea on what I can expect.
I think I do not have the correct battery for my purpose.

 

[dragger201]

You don't say whether the battery is 3s or 4s. Also, your assumption of the motor load is a little off. Max is gonna be 10+ amps with a 5030 prop.

 

[dragger201]

Oh.......and those ratings don't take into acc't that the motors will use more amps momentarily as they come up to speed............overcoming initial resistance from the props, motor weight etc..........

 

[ConfusedMind15]

Thanks for the chart. I've found a one posted elsewhere and was a little off.
BTW I've a 3S battery. So I'll go with assumption of peak current of 10+ per motor at 100% throttle.
I'm hoping my 10A ESC's should be able to handle the load momentarily.