Happymodel EX 1404

Happymodel EX 1404
Image: racedayquads.com
Stator1404
KV options3500
Weight8.7 g
Shaft1.5mm
Max cells3-4S
Configuration9N12P
DimensionsØ17.8x17.6 mm
Max thrust338.3 g
Price (approx.)13.99 USD

At 8.7 g it is 0.8 g lighter than average across the 11 1404-class motors in our database (avg 9.5 g).

Thrust data (Happymodel bench test)

KVPropBatteryThrottleCurrentRPMThrustEfficiency
3500 Gemfan 4024 2-blade propeller 4S — 1 A — 84.2 g 5.689 g/W
3500 Gemfan 4024 2-blade propeller 4S — 2 A — 136.9 g 4.625 g/W
3500 Gemfan 4024 2-blade propeller 4S — 3 A — 178.8 g 4.027 g/W
3500 Gemfan 4024 2-blade propeller 4S — 4 A — 213.3 g 3.603 g/W
3500 Gemfan 4024 2-blade propeller 4S — 5 A — 247.3 g 3.342 g/W
3500 Gemfan 4024 2-blade propeller 4S — 6 A — 275 g 3.097 g/W
3500 Gemfan 4024 2-blade propeller 4S — 7 A — 299 g 2.886 g/W
3500 Gemfan 4024 2-blade propeller 4S — 8.5 A — 338.3 g 2.689 g/W
3500 Gemfan 4024 2-blade propeller 4S — 8.4 A — 335.5 g 2.699 g/W
3500 Gemfan 4023 3-blade propeller 4S — 1 A — 78.8 g 5.324 g/W
3500 Gemfan 4023 3-blade propeller 4S — 2 A — 129.6 g 4.378 g/W
3500 Gemfan 4023 3-blade propeller 4S — 3 A — 168.8 g 3.802 g/W
3500 Gemfan 4023 3-blade propeller 4S — 4 A — 201.4 g 3.402 g/W
3500 Gemfan 4023 3-blade propeller 4S — 5 A — 230 g 3.108 g/W
3500 Gemfan 4023 3-blade propeller 4S — 6 A — 253.1 g 2.85 g/W
3500 Gemfan 4023 3-blade propeller 4S — 7 A — 270 g 2.606 g/W
3500 Gemfan 4023 3-blade propeller 4S — 8 A — 291.6 g 2.463 g/W
3500 Gemfan 4023 3-blade propeller 4S — 9.5 A — 327 g 2.326 g/W
3500 Gemfan 4023 3-blade propeller 4S — 9.2 A — 315 g 2.313 g/W
3500 Gemfan 3018 2-blade propeller 4S — 1 A — 66.9 g 4.52 g/W
3500 Gemfan 3018 2-blade propeller 4S — 2 A — 117.2 g 3.959 g/W
3500 Gemfan 3018 2-blade propeller 4S — 3 A — 165.5 g 3.727 g/W
3500 Gemfan 3018 2-blade propeller 4S — 4 A — 200 g 3.378 g/W
3500 Gemfan 3018 2-blade propeller 4S — 4.4 A — 212 g 3.256 g/W

Manufacturer bench figures (Happymodel bench, 3500 KV on a Gemfan 4024 2-blade, a Gemfan 4023 3-blade and a Gemfan 3018 2-blade at 4S (14.8 V); 5-9 current steps per prop (1-9.5 A), the sheet's throttle column being a PWM value (1463-2200 us) and not a percentage); 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

PropSizeBladesWeight
Gemfan 4022F 2-Blade 4.0x2.2 2 0.37 g
Gemfan Hurricane 3018 Durable 1.5mm 3.0x1.8 2 0.75 g
Gemfan Hurricane 3018 Durable 2mm 3.0x1.8 2 0.75 g
HQProp T3x1.5 Durable 3.0x1.5 2 0.78 g
HQProp T3.5x2.2x2 3.5x2.2 2 1.1 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. This is the one Happymodel motor post that publishes a throttle column, and it is a **PWM command value in microseconds** (1463-2200), not a percentage, so `throttle` is left empty rather than filled with a number this dataset's other rows would read as percent. On the 3500 KV winding the steps are 1483/1607/1692/1758/1826/1883/1948/2200 us (Gemfan 4024 2-blade), 1463/1576/1655/1721/1787/1840/1907/blank/2200 us (4023 3-blade) and 1594/1759/1886/1980/2200 us (3018 2-blade). Its no-load block is 0.21 A and 7050 RPM at 2 V, i.e. a measured 3525 KV. Identity with Happymodel's own block is the 14 mm x 4 mm stator, 3500 KV, a Ø1.5 mm shaft, 9N12P, Ø17.8x17.6 mm, 8.7 g and "KV3500 compatible with 3-4S Lipo", which is this page's 3-4S. Three source facts recorded rather than repaired: each prop run ends in TWO full-throttle (2200 us) rows whose current differs slightly (8.5 A / 338.3 g then 8.4 A / 335.5 g on the 4024, 9.5 A / 327 g then 9.2 A / 315 g on the 4023), so the published maximum is the first of each pair; the 4023 run's 8 A row prints no throttle at all; and the post's third winding is headed EX1404-4850KV in the table against KV4800 in the title and the Specifications block. The 2750 and 4850 KV windings are not on this page - this catalogue publishes only the 3500 KV listing.

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