Happymodel EX 0802 Whoop
| Stator | 0802 |
|---|---|
| KV options | 25000 |
| Weight | 1.7 g |
| Shaft | 1mm |
| Max cells | 1S |
| Configuration | 9N12P |
| Dimensions | Ø10.5x14.9 mm |
| Max thrust | 27.8 g |
| Price (approx.) | 10.99 USD |
At 1.7 g it is 0.20 g lighter than average across the 8 0802-class motors in our database (avg 1.90 g).
Thrust data (Happymodel bench test)
| KV | Prop | Battery | Throttle | Current | RPM | Thrust | Efficiency |
|---|---|---|---|---|---|---|---|
| 25000 | Gemfan 1219 propeller 31mm | 1S | — | 1.03 A | — | 8.4 g | 2.204 g/W |
| 25000 | Gemfan 1219 propeller 31mm | 1S | — | 1.86 A | — | 14 g | 2.034 g/W |
| 25000 | Gemfan 1219 propeller 31mm | 1S | — | 3.05 A | — | 21.4 g | 1.896 g/W |
| 25000 | Gemfan 1219 propeller 31mm | 1S | — | 3.97 A | — | 26.6 g | 1.811 g/W |
| 25000 | Gemfan 1219 propeller 31mm | 1S | — | 4.41 A | — | 27.8 g | 1.704 g/W |
| 25000 | Happymodel 40mm 4-blade propeller | 1S | — | 1.02 A | — | 7.6 g | 2.866 g/W |
| 25000 | Happymodel 40mm 4-blade propeller | 1S | — | 1.99 A | — | 13.2 g | 2.551 g/W |
| 25000 | Happymodel 40mm 4-blade propeller | 1S | — | 2.99 A | — | 18.9 g | 2.431 g/W |
| 25000 | Happymodel 40mm 4-blade propeller | 1S | — | 3.98 A | — | 23.4 g | 2.261 g/W |
| 25000 | Happymodel 40mm 4-blade propeller | 1S | — | 4.53 A | — | 25.2 g | 2.14 g/W |
Manufacturer bench figures (Happymodel bench, 25000 KV on a Gemfan 1219 31mm at 1S (3.7 V) and on a Happymodel 40mm 4-blade at 2.6 V; 5 current steps per prop (1.03-4.41 A and 1.02-4.53 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 |
| Gemfan 35MMS 3-Blade | 1.4x0.96 | 3 | 0.24 g |
| HQProp 40mm Ultralight 3-Blade | 1.6x1.0 | 3 | 0.25 g |
| HQProp Ultralight 31MMX3 31mm Micro/Whoop | 1.22x1.0 | 3 | 0.27 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 post's table is the one Happymodel lays out differently - Model / No-load test / Propellers first, and Power BEFORE Efficiency, where its other motor posts put Efficiency first - so the column order was taken from each table's own header and checked by arithmetic rather than assumed from the brand. The 25000 KV block's no-load test is "0.45A 50840RPM @2V 25420KV". Identity with Happymodel's own Specifications block is six figures our RaceDayQuads listing reprints to the digit: the 8 mm x 2 mm stator, 25000 KV, a 1.0 mm shaft, 9N12P, Ø10.5x14.9 mm and 1.7 g. Two source facts recorded rather than repaired: the 40mm 4-blade run on this winding is benched at 2.6 V where every other run on the sheet is at 3.7 V (the 22000 and 19000 KV windings run the same prop at 3.7 V), and the table labels all three windings "One-Piece Design" where the block beside it describes a double E-clip design. The sheet also carries 22000 and 19000 KV windings of this same product, which this catalogue publishes no page for; their rows are not here because this page is the 25000 KV listing.