I have a DJI F450 frame, Naza lite FC, Emax Mt2213 935kv 2212 motors, 1038 props, 18a hobbywing pentium ESCs, and FS-TH9X transmitter and receiver on the way.
I got the ESCs because the recommendation of the manufacturer said 18a was best. But I understand most people run higher rated ESCs. What is the purpose of this?
I'm also still on the fence about battery capacity, any advice on this would be appreciated.
Anything I seem to be doing wrong? First build and I would just like some reassurance that I'm not totally screwing it up.
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This thing flies beautifully. bought a 3000 mAh battery, fllew her around for a little while. need some simonk escs, shes got a slight wobble at some points. but overall, best quad I've ever flown
I also fly a Flamewheel F450 with the DJI motors and the 30 amp Opto ESCs.
However I agree with Philip above 18 amp is plenty for any normal use.
Mine hovers at well below 50% throttle and at full throttle can disappear from sight going straight up in 4 or 5 seconds. (Not a good thing to do).
And these little Flamewheels handle like a sports car.
Basically unless you stick way too big a battery or try to fly a GoPro with a Gimbal it would be pretty much impossible to exceed your ESCs capability.
The DJI Flamewheel is my recommended first frame or ARF kit build and it looks like you have an excellent example of it.
You can check out the build on my website here:
http://quadcoptersarefun.com/2FlamewheelsBuild.html
Best Regards,
Gary
Awesome!
The 18A ESC is sufficient for those motors. For most people, a 30A ESC is overkill.
With the propeller you have selected, the max current draw at full throttle will be ~10A (per motor) with a 3S battery.
Your max current draw from the battery will be a little over 40A at full throttle. If you fly wide open, a 2.2Ah (2200mAh) 3S battery will last 3.3minutes (60min/hr * 2.2Ah / 40A = 3.3min).
You should hoover at ~2.5A per motor. If you only fly in a hoover, a 2.2Ah (2200mAh) 3S battery will last 13.2minutes (60min/hr * 2.2Ah / 10A = 13.2min).
If you fly in a combination if hoovering and wide-open, then your flight time will be somewhere in between.
OK let me just help you out iwth the ESCs and battery part, first you need to know the maximum current draw of your settup, better explained is the sum of the current needed by every electric/electronic component you have, for instance if your motors draw 25Amps each you get 100 amps just from the motors so when youre buying a battery you always see the mAh on the battery for instance I use a 6400mAh battery so under 100 Amp current draw the duration of the battery is equal to mAh/maxCurrent so you can get an estimate flight duration that way. Now for the ESC if your motors draw 25 Amp each you want to have a higher rated ESC to avoid any current spyke from burning the ESC and obviously bring the quad down in mid air.
My recomendation for you is to check the datasheet of your motors check their max current draw and buy an ESC thats slightly higher rated than that. And for the battery try to get a battery that gives you a high flight time its always more enjoyable. So Good luck and have Fun!.
David Rodriguez
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owner of http://www.multirotorguides.com
Multirotor fanatic