Hello
Does a motor draw more amps when bench tested compared to a punch out in flight? Im a bit worried becouse the manufactuer states that the motor draw 35 amps with 6045 props att fulll trottle with 1100g of lift, will they draw the same in actual flying at full trottle?
Normally you don't fly 100% throttle all the time. I suggest checking if you don't exceed power rating with
http://www.ecalc.ch/xcoptercalc.php which can give approximate rough numbers.
If your ESC are rated 20A that usually means continuous current and they can take more in bursts. However you would need battery that can deliver that much.
If your battery is 45C rated and 1800mAh that means 1.8A * 45C = 81A at most of continuous current (usually its a bit less). If you draw more than that, either battery will not be able to deliver that much, or deliver it in burst. For more current you need higher discharge batteries. So with that battery given that all 4 motors drain same amount of current, you would get 20.25A per motor max. Props 6045 for a 250-290 sized quad are pretty big I have to say.