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.

EX 0802 Whoop vs other 0802 motors on 1S

The same thrust costs different power on different motors. Each line is one maker's own bench series (1S, its own prop), drawn as grams of thrust per watt against thrust, so a higher line makes that thrust for less battery current. Throttle percent is left out on purpose: it means something different on every maker's rig.

Motor	KV	Prop	Peak thrust	At 20 g
Happymodel EX 0802 Whoop	25000	Gemfan 1219 propeller 31mm	28 g at 16 W	10 W (1.91 g/W)
T-Motor M0802 II	25000	M12199	39 g at 18 W	—
BetaFPV 0802SE 0802	23000	GF40mm-2B 1610	35 g at 16 W	9 W (2.35 g/W)
GEPRC SPEEDX2 0802	22000	GF1635 4B	44 g at 33 W	15 W (1.31 g/W)
Happymodel RS 0802	20000	Gemfan 1610 2-blade propeller	35 g at 14 W	7 W (2.82 g/W)
Happymodel SE 0802	19000	55mm 2-blade propeller	34 g at 16 W	8 W (2.61 g/W)

Power at 20 g is read off each maker's curve, straight-line between its two nearest bench points; 20 g is the highest thrust every motor here reached. Different props and rigs move these curves as much as the motor does, so compare rows on a similar prop. Peak thrust of every 0802 motor: 0802 motors compared. How to read a bench table: reading motor bench tables.

Thrust-to-weight with this motor

Four Happymodel EX 0802 Whoop motors at 27.8 g max thrust each give 111.2 g: 2:1, the minimum to fly, up to 55.6 g all-up; 4:1 (freestyle) up to 27.8 g; 8:1 (racing) up to 13.9 g.

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.