Happymodel EX 1103

Stator	1103
KV options	11000
Weight	3.8 g
Shaft	1.5mm
Max cells	1-2S
Configuration	9N12P
Dimensions	Ø13.5x15.5 mm
Max thrust	121.9 g
Price (approx.)	11.99 USD

At 3.8 g it is right at the class average across the 5 1103-class motors in our database (avg 3.8 g).

Thrust data (Happymodel bench test)

KV	Prop	Battery	Throttle	Current	RPM	Thrust	Efficiency
11000	2023R propeller	2S	—	1.07 A	—	23 g	2.905 g/W
11000	2023R propeller	2S	—	2.12 A	—	40.9 g	2.607 g/W
11000	2023R propeller	2S	—	3.17 A	—	56.6 g	2.413 g/W
11000	2023R propeller	2S	—	4.05 A	—	68.6 g	2.289 g/W
11000	2023R propeller	2S	—	5.04 A	—	81.8 g	2.193 g/W
11000	2023R propeller	2S	—	6.19 A	—	95 g	2.074 g/W
11000	2023R propeller	2S	—	7.23 A	—	106.5 g	1.991 g/W
11000	2023R propeller	2S	—	8.27 A	—	115.3 g	1.884 g/W
11000	2023R propeller	2S	—	9.2 A	—	121.9 g	1.791 g/W

Manufacturer bench figures (Happymodel bench, 11000 KV on a 2023R propeller at 2S (7.4 V); 9 current steps 1.07-9.20 A, throttle not published); real-world thrust varies with ESC, battery sag and prop condition.

Thrust-to-weight with this motor

RPM & prop speed on this motor

Props in this motor's class

Prop	Size	Blades	Weight
weBLEEDfpv HQ Ultralight Whoop 31MM	1.22x1.0	3	0.16 g
HQProp 40MMX2 Ultralight 40mm Micro/Whoop	1.6x1.2	2	0.2 g
HQProp 51MMX2 Ultralight	2.0x0.9	2	0.23 g
Gemfan 35MMS 3-Blade	1.4x0.96	3	0.24 g
HQProp 40mm Ultralight 3-Blade	1.6x1.0	3	0.25 g

Where this data comes from

The rows are Happymodel's own bench table, published as an HTML table in the body of its product post on happymodel.cn - the first brand in this dataset whose bench data is markup rather than a photographed sheet, so every figure here is the source's own text. The template is a no-load block (2 V, its current, its speed and the KV that measurement implies) repeated beside a run of Voltage / Current / Thrust / Efficiency / Power rows and the propeller. It steps CURRENT, not throttle, and publishes no per-row RPM, so both those columns are empty here. No spec-block cross-check is possible on this brand: Happymodel's Specifications blocks state no maximum power and no maximum current. Every row reproduces its own printed power as Voltage x Current to within 0.01 W, and its printed efficiency as Thrust / Power. Its no-load block is 0.38 A and 22010 RPM at 2 V, i.e. a measured 11005 KV against an 11000 KV nameplate - the closest agreement of the seven Happymodel windings read. Identity with Happymodel's own block is the 11 mm x 3 mm stator, 11000 KV, a Ø1.5 mm shaft, 9N12P, Ø13.5x15.5 mm and 3.8 g, the last of which our RaceDayQuads listing agrees with. **max_cells was corrected 1S -> 1-2S**: Happymodel's block says "No.of Cells(Lipo):1-2S" and the bench run is at 7.4 V, which is 2S, while our retail listing's own Input Voltage line is blank. One source fact recorded rather than repaired: the propeller cell of this table is a nested one-cell table, so a naive HTML parse loses the prop name - it is a 2023R, and the post's sheet image is named 1103-11000KV.jpg.