3–4-inch cinewhoop, toothpick and long-range FPV motor

MEPS SZ2004 V2

A 17.8 g uni-bell 2004 for 3–4 inch cinewhoops, toothpicks and long-range quads in 1800KV (6S) and 3000KV (4S); on MEPS's bench the 3000KV pulls 628 g on a 4023-3 at 16.8 V and the 1800KV 540 g on MEPS's SZ3046 at 25.2 V.

3–4 inch cinewhoops, toothpicks and long-range quads
6S (1800KV) or 4S (3000KV)
3–4 inch three-blade props such as MEPS's SZ3046

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 2004 motor drawn from MEPS’s published sizes, not its exact design. Thrust, current and power are MEPS’s bench figures for the SZ3046 prop at 25.2 V, read straight across between its throttle steps. Its data starts at 10% throttle.

Version

1800KV6S3000KV4S

MEPS's pick for 3.5-inch long-range, cinematic cinewhoop and HD camera builds on 6S. Tested at 25.2 V with 3052-3, 4023-3 and MEPS SZ3046 props.

Max thrust: 540 g; SZ3046 prop, 25.2 V
Weight: 17.8 g; with cable, both KVs
Peak current: 11.1 A; full throttle
Max power: 277 W; full throttle

Plain links: we earn nothing from them.

What it pulls

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

At 60% with the SZ3046: 241 g of thrust, 3.7 A, 93 W, 2.60 g per watt.

On your quad

All-up weight650 g

3.3 : 1

Thrust to weight at full throttle: four motors pull 2,160 g with the SZ3046 at 25.2 V.

At 60% throttle they pull 964 g, 1.5 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

628 g on 4S
On MEPS's 16.8 V bench the 3000KV pulls 628 g at full throttle on a 4023-3 three-blade, drawing 16.1 A.
Source: MEPS data tests
540 g on 6S
The 1800KV pulls 540 g at full throttle on MEPS's SZ3046 at 25.2 V, drawing 11.1 A.
Source: MEPS data tests
17.8 g
Both KVs weigh 17.8 g including 120 mm leads.
Source: MEPS spec table
Uni-bell
MEPS describes it as an upgrade of its SZ2004: a CNC aluminium uni-bell with N52H arc magnets, NMB bearings and high-temperature copper wire.
Source: MEPS product page, MEPS exploded view

What to pair it with

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

ESC: MEPS's parts list names T-Hobby's F7 35A/45A AIO for cinewhoops and toothpicks. On MEPS's bench the 1800KV draws up to 11.1 A on 6S and the 3000KV up to 21.6 A on 4S, both on the SZ3046. (MEPS product page, MEPS data tests)
Props: MEPS tested 3052-3 and 4023-3 three-blades and its own SZ3046 three-inch three-blade, which it offers with the motor. (MEPS data tests, MEPS product page)
Battery: 6S for the 1800KV, 4S for the 3000KV; MEPS's parts list names Tattu R-Line 1300 mAh 4S and 6S packs. (MEPS spec table, MEPS product page)
Frame: Four M2 screws on a 12 mm circle; M2×6 and M2×7 screws come in the box. (MEPS size chart, MEPS product page)

Where to buy

MEPSthe maker's store; 1 motor (1800KV), marked sold out when checked; $63.60 for 4 in either KV
$16.90seen 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	1,800 rpm/V (also 3000KV)	MEPS spec table
Stator	20 × 4 mm (2004) (from the size in MEPS's name)	MEPS product page
Configuration	12N14P (12 stator slots, 14 magnet poles)	MEPS spec table
Battery	6S LiPo (1800KV); 4S (3000KV) (MEPS's text says the motor supports 4–6S)	MEPS spec table
Weight	17.8 g (with cable, both KVs)	MEPS spec table
Dimensions	φ25.05 × 17.6 mm (with shaft); body 14.1 mm tall	MEPS spec table, MEPS size chart
Shaft	1.5 mm, protrudes 3.5 mm; 4 × M2 prop-mount holes in the top, in pairs 6 mm and 5 mm apart	MEPS spec table, MEPS size chart
Mounting	4 × M2 holes, evenly spaced on a 12 mm circle	MEPS size chart
Bell	CNC-machined aluminium alloy, uni-bell	MEPS product page
Magnets	N52H arc magnets	MEPS product page, MEPS exploded view
Bearings	NMB	MEPS product page, MEPS exploded view
Winding	high-temperature copper wire	MEPS product page
Internal resistance	188 mΩ (±13 mΩ; 79 ± 6 mΩ for 3000KV)	MEPS spec table
Leads	120 mm, with 10 mm of heat-shrink and 3 mm stripped ends	MEPS spec table, MEPS size chart
In the box	4 × M2×6 and 4 × M2×7 hex screws	MEPS product page

Bench data

Redrawn from MEPS’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.

1800KV on 6S, 25.2 V3 props

Prop	Throttle	Voltage (V)	Current (A)	RPM	Thrust (g)	Power (W)	Efficiency (g/W)
SZ3046 (MEPS SZ3046, 3-blade)	10%	25.2	0.2	4478	9	4	2.2
	20%	25.2	0.4	8550	32	11	3
	30%	25.2	0.9	12475	68	22	3.1
	40%	25.2	1.5	16234	117	39	3
	50%	25.2	2.5	19668	176	62	2.8
	60%	25.1	3.7	22935	241	93	2.6
	70%	25.1	5.2	25923	309	130	2.4
	80%	25.1	6.8	28634	379	172	2.2
	90%	25.1	8.8	31560	461	221	2.1
	100%	25	11.1	34318	540	277	1.9
4023-3 (3-blade)	10%	25.2	0.1	4550	5	4	1.4
	20%	25.2	0.3	8782	23	9	2.6
	30%	25.2	0.7	12885	53	16	3.2
	40%	25.2	1.1	16958	95	28	3.4
	50%	25.2	1.7	20786	147	43	3.4
	60%	25.2	2.6	24615	212	64	3.3
	70%	25.2	3.5	27790	277	88	3.2
	80%	25.1	4.7	30984	350	117	3
	90%	25.1	6	34179	428	152	2.8
	100%	25.1	7.7	37216	511	193	2.6
3052-3 (3-blade)	10%	25.2	0.1	4501	6	4	1.8
	20%	25.2	0.4	8664	24	9	2.5
	30%	25.2	0.7	12680	50	18	2.7
	40%	25.2	1.2	16658	91	31	2.9
	50%	25.2	1.9	20469	138	48	2.9
	60%	25.2	2.8	24188	195	72	2.7
	70%	25.1	3.9	27208	250	98	2.5
	80%	25.1	5.3	30305	314	132	2.4
	90%	25.1	6.9	33328	385	174	2.2
	100%	25.1	8.9	36063	454	223	2

Source: MEPS data tests

3000KV on 4S, 16.8 V3 props

Prop	Throttle	Voltage (V)	Current (A)	RPM	Thrust (g)	Power (W)	Efficiency (g/W)
4023-3 (3-blade)	10%	16.8	0.3	5177	8	4	1.9
	20%	16.8	0.7	10011	32	12	2.7
	30%	16.8	1.4	14722	70	23	3
	40%	16.8	2.4	19473	124	40	3.1
	50%	16.7	3.7	23498	190	61	3.1
	60%	16.7	5.4	27281	263	89	2.9
	70%	16.7	7.3	30920	344	122	2.8
	80%	16.6	9.6	34174	428	159	2.7
	90%	16.6	12.6	37512	524	208	2.5
	100%	16.5	16.1	40710	628	266	2.4
SZ3046 (MEPS SZ3046, 3-blade)	10%	16.8	0.3	5092	10	5	2.1
	20%	16.8	0.8	9713	40	14	2.8
	30%	16.8	1.8	14166	86	30	2.8
	40%	16.7	3.3	18173	146	55	2.7
	50%	16.7	5.2	21963	215	87	2.5
	60%	16.7	7.7	25314	288	128	2.3
	70%	16.6	10.4	28315	359	173	2.1
	80%	16.6	13.5	31368	440	223	2
	90%	16.5	17.3	34340	527	285	1.9
	100%	16.4	21.6	37162	615	354	1.7
3052-3 (3-blade)	10%	16.8	0.3	4923	7	5	1.3
	20%	16.8	0.8	9677	28	14	2
	30%	16.8	1.6	13917	61	27	2.3
	40%	16.8	2.7	18162	107	45	2.4
	50%	16.7	4.1	22297	163	69	2.4
	60%	16.7	6	26184	230	100	2.3
	70%	16.7	8	29290	289	133	2.2
	80%	16.6	10.4	32310	356	173	2.1
	90%	16.6	13.5	35271	432	223	1.9
	100%	16.5	18.3	39255	542	301	1.8

Source: MEPS data tests

Inside the motor

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

Bell. CNC-machined aluminium uni-bell, grey (MEPS's "Gray"), with five slotted spokes in the top and dark grey cut faces. (MEPS product page, MEPS photo)
Magnets. N52H arc magnets. (MEPS product page, MEPS exploded view)
Bearings. NMB bearings. (MEPS product page, MEPS exploded view)
Shaft. 1.5 mm, standing 3.5 mm above the bell, with four M2 prop-mount holes round it. (MEPS size chart)
Base. Four M2 holes evenly spaced on a 12 mm circle. (MEPS size chart)
Leads. 120 mm, with 10 mm of heat-shrink and 3 mm stripped ends. (MEPS size chart)

How fast it spins

KV is the motor’s no-load speed per volt. With nothing on the shaft, the 1800KV 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	26,640	3,108 Hz	18,648
4S full	16.8	30,240	3,528 Hz	21,168
6S nominal	22.2	39,960	4,662 Hz	27,972
6S full	25.2	45,360	5,292 Hz	31,752

A 14-pole rotor has 7 pole pairs, so every turn of the shaft is 7 electrical cycles, and a six-step ESC switches the phases 42 times per turn.

About the 3D model

A generic outrunner drawn from MEPS’s published sizes: the 20 × 4 mm stator, 25.05 mm bell, 14.1 mm height, 1.5 mm shaft, 12 mm mounting circle and 12 teeth and 14 magnets. Anything MEPS 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.

Sources

MEPS: SZ2004 V2 FPV Drone Motor for 3.5inch Cinewhoop Long-Range 1800KV/3000KV (product page, MEPS's own store). Retrieved Oct 19, 2026.
MEPS: SZ2004 V2 specification table for 1800KV and 3000KV (image on the product page). Retrieved Oct 19, 2026.
MEPS: SZ2004 V2 size chart (image on the product page). Retrieved Oct 19, 2026.
MEPS: SZ2004 V2 KV1800 and KV3000 data tests, 10–100% throttle with 3052-3, 4023-3 and SZ3046 props, at 25.2 V (1800KV) and 16.8 V (3000KV) (image on the product page). Retrieved Oct 19, 2026.
MEPS: SZ2004 V2 exploded view: N52H arc magnets, NMB bearings, high-temperature wire (image on the product page). Retrieved Oct 19, 2026.
MEPS: SZ2004 V2 1800KV Gray main product photo, used for finish and spoke count. Retrieved Oct 19, 2026.