are my calculations correct?

[crlock]

Hi guys, i have a question regarding my batteries

My setup is like this

x3 750kv outrunners RC-Timer motors
11x4,7 props
x3 turnygy plush 18A ESCs
2200 mAh 3S 20-30C turnigy Lipo

the total weight of my tricopter is 1080 grams (2lb 6.0959oz)

from the top of my head I calculated that

18 amps, times 3 is 54 amps maximum draw from the battery
and at peak my battery can deliver 66 amps so for al purpueses the battery should be fine

I don't have a watt meter, to measure the real numbers, and i'm just getting like 3-4 minutes of flight time is this the average flight time with this kind of setup?

cheers

 

[Tritium]

That would sound about right for full throttle operation but for normal flying I would expect about 2X more flight time minimum but as always YMMV. You could try a smaller prop which will reduce lift but increase run time.

Thurmond

 

[crlock]

I see, maybe my setup is too heavy? how much does the average tricopter setup weight?

 

[tramsgar]

A few minutes seems reasonable with that amp draw and that battery capacity.