Hello
Anyone here using the H11MD of hobbywing?
I am having trouble selecting the battery, the website don’t specify if the Amp consumption is per motor or per axis.
The battery seller say that a 14S, 22ah, 5C battery can do the job for a 10 minute flight but for some reason I don’t believe on those numbers.
Any help will be appreciated.
Without any details about the size, weight and flight profile any recommendation is nearly impossible.
As I understood the datasheet of the H11MD is a complete unit of an ESC and two motors. All values on the datasheet are for such a complete unit.
What kind of battery you are looking for as 5C seems to be a relative low value for LiIon or LiPo but for LFP relative high.
If your battery is a 22Ah 5C you can use up to 110 A (~5940 W). So if your plane has 4 H11MD this is max 1485 W input power or ~15,636 Kg thrust based on the datasheet per unit for ~10 min.
But this calculation is very rough.
Better results you can get from ECALC
Never had a problem with hobbywing datasheet, the data provided always was close to the test bench.
Looks like the data is specified per motor, compare with same prop on X11 Max - its close.
Without knowing AUW of your craft it’s impossible to know what battery you need.
The distance from motor to motor is 80 inch.
Maximum take off weight will be 112kg
As I just want to do some test, I will only do hover with some control movement (Pitch, Roll, Yaw)
112kg/8motors=14kg/motor, it’s approximate 25a per motor, 200a for whole craft.
If we count from other site - if you get very good performance like 10g/w you still need
112000g/10=11.2kw consumption, leads to:
11.2/8=1.4kw per motor
1400w/54v=25.9a per motor.
So no, 22ah 5c battery is not enough, for 10 minute hover you need
200a*0.16h (1h/6=10m) = 33ah without any reserve capacity, if you add some 20% than you need
40ah 5c (continuous) battery is more real.
22ah should be enough for up to ~65kg AUW
