1S tiny whoop motor

BetaFPV 0702 / 0702SE

A 1S motor for 65 mm whoops: 1.42 g (0702SE) or 1.52 g (0702), and up to 25.9 g of thrust per motor on 31 mm props on BetaFPV's 4 V bench (0702 27000KV).

65 mm 1S whoops
1S
31 mm props: Gemfan 1208 three-blade for racing, 1210 two-blade for freestyle

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. No-load speed is KV × 3.7 V, a nominal pack for this version. BetaFPV’s bench tables for it step by thrust rather than throttle, so they are in the bench data below, not on this readout.

Version

23000KV1S25000KV1S27000KV1S30000KV1S

Sold as the 0702 (dual ball bearings, black, 1.52 g) and the 0702SE (brass bushings, ice blue, 1.42 g); bench tables for both.

Weight: 1.52 g; 0702, ±0.03 g, 1.45 g without its plug; the 0702SE is 1.42 g (1.35 g without its plug)

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What you get

1.42 g
The brass-bushing 0702SE weighs 1.42 g (1.35 g without its plug), the ball-bearing 0702 1.52 g (1.45 g).
Source: BetaFPV product page
Two bearing choices
Brass bushings on the 0702SE, which BetaFPV calls light, low-cost and durable for crash-prone flying; dual ball bearings on the 0702 for smoother running, better high-speed performance and a longer life.
Source: BetaFPV product page
25.9 g at 3.7 A
On BetaFPV's 4 V bench the 0702 27000KV pulls 25.90 g on Gemfan 1208 three-blade props at 3.7 A.
Source: BetaFPV 0702 sheet
PEEK screws in the box
BetaFPV includes 15 PEEK screws; it says 12 weigh 0.10 g and save up to 0.46 g on a build against metal screws.
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 F4 1S 5A AIO flight controller. On its 4 V bench the motors draw up to 4.1 A (0702 30000KV). (BetaFPV product page, BetaFPV 0702 sheet)
Props: BetaFPV suggests Gemfan 1208 three-blade props with the 27000KV or 30000KV for racing and Gemfan 1210 two-blade props with the 25000KV or 27000KV for freestyle; it also lists HQ 31 mm three-blade and Gemfan 1219S props. (BetaFPV product page)
Battery: 1S; BetaFPV suggests its BT2.0 300 mAh 1S packs. (BetaFPV product page)
Frame: Three M1.4 screws on a 6.6 mm circle; BetaFPV names its Meteor65 and Meteor65 Pro frames. (BetaFPV product page, BetaFPV 0702 sheet)

Where to buy

BETAFPVthe maker's store; set of 4: $48.99 0702, $43.99 0702SE 23000KV or 27000KV, $19.99 0702SE 25000KV; all sold out when checked
$48.99seen Oct 19, 2026
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 (sold as both the 0702 and the 0702SE; also 0702 30000KV and 0702SE 23000KV and 25000KV)	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	1.52 g (0702, ±0.03 g, 1.45 g without its plug; the 0702SE is 1.42 g (1.35 g without its plug))	BetaFPV product page
Dimensions	φ9 × 12.75 mm (with shaft); body 8.55 mm tall	BetaFPV product page, BetaFPV 0702 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, BetaFPV 0702 sheet
Bearings	dual ball bearings (0702); brass bushings (0702SE)	BetaFPV product page
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	Current (A)	Power (W)	Thrust (g)	Efficiency (g/W)
HQ 31mm-3B (HQ 31 mm, 3-blade)	0.5	2	2.3	1.15
	1	4	5.25	1.31
	1.5	6	8.4	1.4
	2	8	13.06	1.63
	2.5	10	18.7	1.87
	3	12	22.3	1.86

Source: BetaFPV 0702SE sheet

25000KV on 1S, 4 V2 props

Prop	Current (A)	Power (W)	Thrust (g)	Efficiency (g/W)
GF-1208-3P (Gemfan 1208, 3-blade)	0.5	2	2.57	1.29
	1	4	5.45	1.36
	1.5	6	8.8	1.47
	2	8	14	1.75
	2.5	10	19.8	1.98
	3	12	24.1	2.01
	3.1	12.4	25.2	2.03
GF-1210-2P (Gemfan 1210, 2-blade)	0.5	2	2.75	1.38
	1	4	5.3	1.33
	1.5	6	8.9	1.48
	2	8	13.3	1.66
	2.5	10	19.3	1.93
	3	12	23.4	1.95
	3.2	12.8	24.5	1.91

Source: BetaFPV 0702SE sheet

27000KV on 1S, 4 V4 props

Prop	Current (A)	Power (W)	Thrust (g)	Efficiency (g/W)
GF-1208-3P, 0702 (Gemfan 1208, 3-blade, on the ball-bearing 0702)	0.5	2	1.24	0.62
	1	4	3.5	0.88
	1.5	6	5.75	0.96
	2	8	9.63	1.2
	2.5	10	14.49	1.45
	3	12	20.77	1.73
	3.5	14	24.6	1.76
	3.7	14.8	25.9	1.75
GF-1210-2P, 0702 (Gemfan 1210, 2-blade, on the ball-bearing 0702)	0.5	2	1.52	0.76
	1	4	3.77	0.94
	1.5	6	6.06	1.01
	2	8	9.94	1.24
	2.5	10	14.64	1.46
	3	12	20.04	1.67
	3.5	14	23.45	1.68
	3.7	14.8	24.7	1.67
GF-1208-3P, 0702SE (Gemfan 1208, 3-blade, on the brass-bushing 0702SE)	0.5	2	1.61	0.81
	1	4	3.57	0.89
	1.5	6	5.87	0.98
	2	8	9.1	1.14
	2.5	10	12.25	1.23
	3	12	18.45	1.54
	3.5	14	21.8	1.56
	3.8	15.2	23.67	1.56
GF-1210-2P, 0702SE (Gemfan 1210, 2-blade, on the brass-bushing 0702SE)	0.5	2	1.79	0.9
	1	4	3.65	0.91
	1.5	6	5.85	0.98
	2	8	8.86	1.11
	2.5	10	12.87	1.29
	3	12	17.85	1.49
	3.5	14	21.5	1.54
	3.9	15.6	23.5	1.51

Source: BetaFPV 0702 sheet, BetaFPV 0702SE sheet

30000KV on 1S, 4 V2 props

Prop	Current (A)	Power (W)	Thrust (g)	Efficiency (g/W)
GF-1208-3P (Gemfan 1208, 3-blade)	0.5	2	1.2	0.6
	1	4	2.87	0.72
	1.5	6	4.41	0.74
	2	8	7.72	0.97
	2.5	10	12.06	1.21
	3	12	17.18	1.43
	3.5	14	21.7	1.55
	4.1	16.4	25.25	1.54
GF-1210-2P (Gemfan 1210, 2-blade)	0.5	2	1.39	0.7
	1	4	2.98	0.75
	1.5	6	4.76	0.79
	2	8	7.59	0.95
	2.5	10	11.94	1.19
	3	12	16.31	1.36
	3.5	14	20.9	1.49
	4.1	16.4	24.4	1.49

Source: BetaFPV 0702 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. Black with a red top on the 0702; polished silver with an ice-blue top and base on the 0702SE. (BetaFPV product page)
Bearings. Dual ball bearings on the 0702, brass bushings on the 0702SE. (BetaFPV product page)
Shaft. 1 mm, standing 4.2 mm above the bell. (BetaFPV product page)
Base. Three M1.4 holes evenly spaced on a 6.6 mm circle. (BetaFPV product page)
Leads. Three 30 AWG wires, 35 mm long 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.