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Printing 3d Forum

Esc's for tmotor f20 pro III?

Started by pete678, Tuesday,July 17, 2018, 12:27:30

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Im looking at static thrust tests and they reach 51a i think from memory?!
My question is would a 40a esc be adequate for these motors as i don't want to
buy them just to fry the esc's in the end!!
i fly very smooth and not many massive punch outs if that of any use?!
and suggestions would be great  :smiley:


They would probably be OK but are they a 'good quality' esc rated at 40amps continuous? Do they have a higher 'burst' rating?
Normally it is considered static thrust can consume upto 25% more amps.

I would say there is a slight risk but ultimately what would it cost in crash damage if the 40A esc let go vs the additional cost of good 50A esc?
I try :-)


Tuesday,July 17, 2018, 13:25:44 #2 Last Edit: Tuesday,July 17, 2018, 13:28:56 by Cheredanine
Oh my,
Ok try and get the motors right.
There is no f20 pro of any type
No f20iii either
Assume you mean f40 or f60
Both of which there is a pro ii or an iii (not pro)

In any case the amp draw is entirely dependent on what props you use and what cell count you run at as well as the kv of the motors (they are available in a number of kv)

Bench test data is not rally much use in any case, there is far more load on the motor on the bench, in flight you will draw considerably less amps.

On something like an f40ii pro in the 2400kv range on 4s with 5 inch triblades 30amp+ is fine, but if you can provide the correct details we can perhaps help


DOH!!! sorry,
i meant f40 pro II 2400kv. probably going to be using hq 5x4.3x3 props as i really like them. biggest prop would probably be 5x4.8x3 hq again.


i'm currently looking at the spedix is45 but would that be considered a little overkill?


On 4s, massive overkill, 30amp would be fine


you are a star Cheredanine! thanks alot. You've saved me £25!!
really appreciate it bud  :smiley: