This is from my hexa,please look at the voltage and amps indication during hover, as you see hover amps is around 40, and voltage drops significant during flight.
I would like to know if this is normal or something is wrong with my design.
Batteries 2 3300 3s 25c in parallel
Very much appreciate your comments.
How is anyone supposed to comment on your design if you don’t say a single word about it and the purpose?
If you lift a 10kg camera platform, 40 amps are a very good value. If you have an ultralight hex which was built for endurance records, 40 amps is a very bad value.
The voltage drops if you put load on a LiPo. That’s normal. The higher the load and the lower the battery quality, the faster and lower the voltage drop.
Wight is on the post , is around 2,3 kgs ,
Voltage drop has to do only with consumption , wire gauge, batteries used,
Amps , of course I understand will be related to many other factors , motors selected, props, AUW, but that is not my question .
Hope is more clear now,
My conclusions so far are , that even when I’m in the range of the lipo amps rating, voltage drops in te batteries are higher than it should (turnigy. Microtech 3300 25 50 c 2x in parallel ) , and that m motors turnigy 2836 9 950 props 10x47 , are to tight for the weight ,
Then I’m planing to improve on higher c rating batterie , and bigger motors that would allow for 2,8 kgs AUw.
Motors I’m considering are multistar 2814 700
And multistar 3508 700
Any thoughts ?
Thanks
Batteries are nanotech 3s, and I’m evaluating going to 4s.
I find 40A for 2.3kg pretty massive. My quad pulls 20A (4S) at 2.8kg and that is even more than I’m happy with…
I would try 700kV motors with 12-14" props if you can fit those to your frame. That should be more efficient.
And - no - voltage drop is a lot dependent on the battery quality! I have a cheap crap 10Ah 5C LiPo from eBay which drops from 4.2/cell to 3.7V/cell fully charged when I pull only 20A out of it…
For high load applications, I’d recommend looking at other batteries, Such as GensAce or Maxamps. They are more expensive but definitely worth it.
Edit:
You should definitely go to 4S if not even 6S for a hex (depending on the load you are planning to carry).
Thanks for your recommendation .
12in props won’t fit , as the hex is a 550 flame wheel , I’m planing to go for a y6. With tha 700 motors ,
Stefan , what motors are you actually using in your quad ?,
Thank you
Gustavo
Multistar 4822-390kV with 17" props. With 15" props I’m around 17A but I broke them and am waiting for spares 
.