1S tiny whoop motor

BetaFPV 0702 II / 0702SE II

A 1.47 g motor for 65 mm 1S whoops, pulling 35.4 g at full throttle on a Gemfan 1219S in BetaFPV's 4 V test (0702SE II, 27000KV).

65 mm 1S whoops (Air65, Meteor65 Pro)
1S
31 mm props: Gemfan 1208 three-blade or 1210 two-blade

Drawing the 3D model…

Throttle60%

The spin is an illustration: the model turns at 1/600 of the no-load speed, and it is a generic 0702 motor drawn from BetaFPV’s published sizes, not its exact design. Thrust, current and power are BetaFPV’s bench figures for the GF 1219S-3P prop at 4 V, read straight across between its throttle steps. Its data starts at 10% throttle.

Version

23000KV1S27000KV1S30000KV1S

0702SE II: brass bushings, ice blue, 1.47 g.

Max thrust: 35 g; GF 1219S-3P prop, 4 V
Weight: 1.47 g; 0702SE II 27000KV with its 35 mm lead and plug; 1.45 g for the 23000KV, 1.55 g for the 0702 II. BetaFPV gives 1.40 g for the 27000KV with a 25 mm lead.
Peak current: 5.2 A; full throttle
Max power: 21 W; full throttle

Plain links: we earn nothing from them.

What it pulls

BetaFPV’s own bench test, one line per prop. Drag across the chart to move the throttle; the model above follows.

At 60% with the GF 1219S-3P: 18 g of thrust, 2.9 A, 12 W, 1.58 g per watt.

On your quad

All-up weight650 g

0.2 : 1

Thrust to weight at full throttle: four motors pull 142 g with the GF 1219S-3P at 4 V.

At 60% throttle they pull 73 g, 0.1 times the quad’s weight.

All-up weight is the quad ready to fly, with its battery and camera. The thrust is the maker’s static bench figure; in the air it is lower.

What you get

Tile-shaped magnets
With the new magnets, a reworked magnetic circuit and a higher coil fill, BetaFPV measured 12.7–14.8% more thrust than the first 0702, and says the magnets all but end magnetic degradation in hard flying.
Source: BetaFPV product page
Bushings or bearings
The 0702SE II runs on brass bushings and weighs 1.45–1.47 g; the 0702 II has dual ball bearings and weighs 1.55 g.
Source: BetaFPV product page
PEEK screws in the box
BetaFPV says 12 PEEK screws weigh 0.10 g and save up to 0.46 g per build against metal ones; metal screws come too.
Source: BetaFPV product page
Bench numbers
Full throttle at 4 V on a Gemfan 1219S: 32.0 g (23000KV), 35.4 g (27000KV), 37.2 g (30000KV).
Source: BetaFPV product page

What to pair it with

Our reading of BetaFPV’s numbers, so your build matches what the motor was tested with.

ESC: BetaFPV pairs it with its Air FC and Matrix 1S 5IN1 boards. At full throttle on its 4 V bench a motor draws 4.19 A (23000KV), 5.20 A (27000KV) or 5.15 A (30000KV). (BetaFPV product page, BetaFPV 0702 II sheet, BetaFPV 0702SE II sheet)
Props: Gemfan 1208 three-blade (31 mm) for racing on the 27000KV or 30000KV, Gemfan 1210 two-blade (31 mm) for freestyle on the 27000KV. BetaFPV's bench uses the Gemfan 1219S three-blade. (BetaFPV product page, BetaFPV 0702 II sheet, BetaFPV 0702SE II sheet)
Battery: 1S; BetaFPV suggests its LAVA 1S 260 mAh or 300 mAh packs. (BetaFPV product page)
Frame: Three M1.4 screws on a 6.6 mm circle; BetaFPV names its Air65 and Meteor65 Pro frames. (BetaFPV product page)

Where to buy

BETAFPVthe maker's store; set of 4: $43.99 0702SE II, $48.99 0702 II; all sold out when checked
$43.99seen Oct 19, 2026
Visit
GetFPV0702SE II, 23000KV or 27000KV
price on the store’s page
Visit

Plain links, not affiliate links. Prices change; the store’s page has the current one.

Full specs

Spec	Value	Source
KV	27,000 rpm/V (0702SE II; also 0702SE II 23000KV and 0702 II 30000KV)	BetaFPV product page
Stator	7 × 2 mm (0702) (from the size in BetaFPV's name)	BetaFPV product page
Battery	1S LiPo	BetaFPV product page
Weight	1.47 g (0702SE II 27000KV with its 35 mm lead and plug; 1.45 g for the 23000KV, 1.55 g for the 0702 II. BetaFPV gives 1.40 g for the 27000KV with a 25 mm lead.)	BetaFPV product page
Dimensions	φ9 × 12.75 mm (with shaft); body 8.55 mm tall	BetaFPV 0702SE II sheet
Shaft	1 mm, protrudes 4.2 mm	BetaFPV product page
Mounting	3 × M1.4 holes, evenly spaced on a 6.6 mm circle	BetaFPV product page
Magnets	tile-shaped	BetaFPV product page
Bearings	brass bushings (0702SE II); dual ball bearings (0702 II)	BetaFPV product page
Peak current	5.2 A (100% throttle, GF 1219S, 4 V; 4.19 A for the 23000KV, 5.15 A for the 0702 II 30000KV)	BetaFPV 0702SE II sheet
Max power	20.8 W (16.76 W for the 23000KV, 20.6 W for the 0702 II 30000KV)	BetaFPV 0702SE II sheet
Leads	30 AWG, 35 mm including the JST 1.25 mm 3-pin plug	BetaFPV product page
In the box	4 motors, 15 × M1.4×3 PEEK screws, 12 × M1.4×3 metal screws	BetaFPV product page

Bench data

Redrawn from BetaFPV’s test reports. Thrust is static pull on a bench, more than you get in flight. Power is volts × amps; efficiency is thrust divided by power.

23000KV on 1S, 4 V1 prop

Prop	Throttle	Current (A)	Thrust (g)	Efficiency (g/W)	Power (W)
GF 1219S-3P (Gemfan 1219S, 3-blade)	10%	0.15	0.55	0.92	0.6
	20%	0.57	2.7	1.18	2.28
	30%	1.01	5.48	1.36	4.04
	40%	1.42	8.93	1.57	5.68
	50%	1.83	12.3	1.68	7.32
	60%	2.3	16.08	1.75	9.2
	70%	2.67	20.56	1.93	10.68
	80%	3.12	24.5	1.96	12.48
	90%	3.49	27.5	1.97	13.96
	100%	4.19	32	1.91	16.76

Source: BetaFPV 0702SE II sheet

27000KV on 1S, 4 V1 prop

Prop	Throttle	Current (A)	Thrust (g)	Efficiency (g/W)	Power (W)
GF 1219S-3P (Gemfan 1219S, 3-blade)	10%	0.22	0.7	0.8	0.88
	20%	0.77	2.76	0.9	3.08
	30%	1.39	5.94	1.07	5.56
	40%	1.92	9.65	1.26	7.68
	50%	2.42	13.69	1.41	9.68
	60%	2.9	18.35	1.58	11.6
	70%	3.34	22.4	1.68	13.36
	80%	3.86	26.9	1.74	15.44
	90%	4.32	30.92	1.79	17.28
	100%	5.2	35.4	1.7	20.8

Source: BetaFPV 0702SE II sheet

30000KV on 1S, 4 V1 prop

Prop	Throttle	Current (A)	Thrust (g)	Efficiency (g/W)	Power (W)
GF 1219S-3P (Gemfan 1219S, 3-blade)	10%	0.22	0.71	0.81	0.88
	20%	0.76	2.91	0.96	3.04
	30%	1.37	6.5	1.19	5.48
	40%	1.9	10	1.32	7.6
	50%	2.47	14.36	1.45	9.88
	60%	2.87	18.75	1.63	11.48
	70%	3.3	24	1.82	13.2
	80%	3.8	28.6	1.88	15.2
	90%	4.23	32.4	1.91	16.92
	100%	5.15	37.2	1.81	20.6

Source: BetaFPV 0702 II sheet

Inside the motor

A brushless outrunner: the coils stand still in the middle and the magnets spin around them. From the top down:

Bell. Polished silver with an ice-blue top and base on the 0702SE II; black with a red top on the 0702 II. (BetaFPV product photo)
Magnets. Tile-shaped magnets in a reworked magnetic circuit, with a higher coil fill than the first 0702. (BetaFPV product page)
Bearings. Brass bushings on the 0702SE II, dual ball bearings on the 0702 II. (BetaFPV product page)
Leads. 30 AWG, 35 mm including the JST 1.25 mm three-pin plug. (BetaFPV product page)

How fast it spins

KV is the motor’s no-load speed per volt. With nothing on the shaft, the 27000KV version reaches about these speeds; a prop loads the motor and brings it down, typically to around 70–75% of these figures at full throttle.

Battery	Volts	No-load rpm (KV × V)	Electrical frequency	ESC steps per second
4S nominal	14.8	399,600	39,960 Hz	239,760
4S full	16.8	453,600	45,360 Hz	272,160
6S nominal	22.2	599,400	59,940 Hz	359,640
6S full	25.2	680,400	68,040 Hz	408,240

A 12-pole rotor has 6 pole pairs, so every turn of the shaft is 6 electrical cycles, and a six-step ESC switches the phases 36 times per turn.

About the 3D model

A generic outrunner drawn from BetaFPV’s published sizes: the 7 × 2 mm stator, 9 mm bell, 8.55 mm height, 1 mm shaft and 6.6 mm mounting circle. Anything BetaFPV doesn’t publish is typical for a motor this size, and the bell’s spoked top, the base and the inside are a generic design, not this motor’s. The colours are read off the maker’s product photos. There are no logos or markings: it is our drawing, not the maker’s.