E3 Series / 31XX / E3 Series

E3 3115 Brushless Motor

A durable high-power 3115 brushless motor for 8-10 inch FPV platforms, available in 400KV, 640KV, 900KV and 1050KV for 4-12S systems.

400KV640KV900KV1050KV

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KEY FEATURES

Designed for FPV performance tuning

A rugged steel shaft and AL 7075 anodized housing resist deformation and help preserve alignment after impact.
N52SH arc magnets, a one-piece outer rotor, and single-strand winding maintain torque while controlling heat under sustained load.
A G1-level precision bearing reduces high-speed noise and vibration for reliable operation with 8-10 inch propellers.
Verified load-test data covers four KV options and nine propeller configurations from 4S through 12S applications.

SPECIFICATIONS

Product snapshot

Stator Size: 3115
Series: E3 Series
KV Options: 400KV, 640KV, 900KV, 1050KV
Motor Dimensions: 38.8 x 48.6 mm
Framework: 12N14P
Battery: 4-12S, depending on KV
Propeller: 8-10 inch
Weight: 108-111 g without silicone wire
Bearing Shaft: 5 mm
Prop Adapter Shaft Thread: M5
Shaft Thread: CW
Mounting Pattern: 19 x 19 mm, M3
Lead: 270 mm 18 AWG silicone wire

VARIANT SPECIFICATIONS

KV configuration matrix

KV	Battery cells	Propeller	Idle current	Internal resistance	Peak current	Maximum power
400KV	10-12S	10 inch	0.6 A @ 10 V	141 mOhm	36 A @ 12S	1728 W @ 12S
640KV	6-8S	10 inch	1.2 A @ 10 V	64 mOhm	59 A @ 8S	1888 W @ 8S
900KV	4-6S	10 inch	1.7 A @ 10 V	42 mOhm	77 A @ 6S	1925 W @ 6S
1050KV	4-6S	8-9 inch	2.1 A @ 10 V	35 mOhm	88 A @ 6S	2200 W @ 6S

ENGINEERING AND PERFORMANCE

Built for high power that lasts

Every critical component is engineered to maintain performance under heat, high RPM and impact, giving 8-10 inch FPV aircraft dependable power throughout demanding flights.

Built robust

Resists crash-induced damage to help preserve motor alignment and consistent output.

Withstands heat

Reduces heat-related power fading during sustained high-RPM and heavy-load operation.

Rapid response

Minimizes throttle lag while maintaining the low-end torque demanded by large propellers.

Critical component construction

Rugged steel shaft

Resists bending to reduce vibration and rotor contact after hard impacts.

AL 7075 anodized housing

Combines impact resistance with a lightweight and corrosion-resistant structure.

One-piece outer rotor

Secures the magnets firmly to reduce jitter and power loss under impact.

N52SH arc magnets

Retains magnetic strength at elevated temperatures to limit torque drop-off.

Single-strand winding

Lowers internal resistance and helps control excess heat under heavy load.

G1-level precision bearing

Reduces high-speed noise and vibration while supporting a longer service life.

Choose the E3 3115 KV for your aircraft

400KV

Maximum-voltage high load

10-12S power for 10 inch high-load, endurance and professional FPV aircraft.

640KV

Long-range balance

6-8S power for efficient 10 inch long-range and exploration platforms.

900KV

Cinematic power

4-6S power for responsive 10 inch cinematic and high-load FPV builds.

1050KV

Freestyle response

4-6S power for agile 8-9 inch freestyle and specialty FPV aircraft.

High performance with accessibility

The E3 Series combines optimized materials and manufacturing with durable power and efficiency for demanding FPV aircraft.

A reliable platform for modern FPV

Engineered for demanding conditions while maintaining sustained output for long-range, cinematic, freestyle and professional FPV applications.

OFFICIAL GRAPHICS

Engineering drawing and specifications

E3 3115 Brushless Motor engineering drawing 1

E3 3115 Brushless Motor technical specifications
SPECIFICATIONS
Framework	12N14P
Length	48.6 mm
Diameter	38.8 mm
Battery cells - 400KV	10-12S
Battery cells - 640KV	6-8S
Battery cells - 900KV	4-6S
Battery cells - 1050KV	4-6S
Recommended propeller	8-10 inch
Weight - 400KV	109 g without silicone wire
Weight - 640KV	111 g without silicone wire
Weight - 900KV	108 g without silicone wire
Weight - 1050KV	110 g without silicone wire
Prop adapter shaft thread	M5
Bearing shaft	5 mm
Shaft thread	CW
FEATURES
G1-level rolling-element precision bearing
Steel shaft
AL 7075 anodized housing
19 x 19 mm M3 mounting-hole pattern
Single-strand winding
270 mm 18 AWG silicone wire
PACKAGE INCLUDES
5 x M3 x 10 screws
1 x aluminum M5 nyloc nut
1 x washer and screw for shaft

LOAD TEST DATA

Verified performance data

The following measurements are from EMAX load-test records. Results may vary with battery, propeller, environment, and installation conditions.

400KV

GF 10 x 5, 3-blade — 48 V

E3 3115 Brushless Motor 400KV - GF 10 x 5, 3-blade — 48 V
VoltageV	CurrentA	Thrustg	PowerW	Efficiencyg/W	SpeedRPM	Throttle%
48	1.39	436	66.72	6.53	5247	30
48	2.86	820	137.28	5.97	6831	40
48	5.26	1298	252.48	5.14	8344	50
48	8.53	1846	409.44	4.51	9789	60
48	12.7	2440	609.6	4	11145	70
48	17.9	3052	859.2	3.55	12328	80
48	24.3	3720	1166.4	3.19	13471	90
48	32.6	4470	1564.8	2.86	14720	100

HQ 10 x 5, 3-blade — 48 V

E3 3115 Brushless Motor 400KV - HQ 10 x 5, 3-blade — 48 V
VoltageV	CurrentA	Thrustg	PowerW	Efficiencyg/W	SpeedRPM	Throttle%
48	1.46	512	70.08	7.31	5203	30
48	3.2	915	153.6	5.96	6768	40
48	5.85	1410	280.8	5.02	8235	50
48	9.49	1952	455.52	4.29	9642	60
48	13.9	2564	667.2	3.84	10915	70
48	19.5	3182	936	3.4	12105	80
48	26.2	3785	1257.6	3.01	13209	90
48	35.4	4630	1699.2	2.72	14430	100

640KV

GF 10 x 5, 3-blade — 32 V

E3 3115 Brushless Motor 640KV - GF 10 x 5, 3-blade — 32 V
VoltageV	CurrentA	Thrustg	PowerW	Efficiencyg/W	SpeedRPM	Throttle%
32	2.25	472	72	6.56	5324	30
32	4.85	910	155.2	5.86	6994	40
32	9.06	1445	289.92	4.98	8627	50
32	15.1	2060	483.2	4.26	10128	60
32	23.2	2729	742.4	3.68	11543	70
32	33.1	3435	1059.2	3.24	12855	80
32	45.6	4152	1459.2	2.85	14056	90
32	54.3	4640	1737.6	2.67	14850	100

HQ 10 x 5, 3-blade — 32 V

E3 3115 Brushless Motor 640KV - HQ 10 x 5, 3-blade — 32 V
VoltageV	CurrentA	Thrustg	PowerW	Efficiencyg/W	SpeedRPM	Throttle%
32	2.4	510	76.8	6.64	5225	30
32	5.38	964	172.16	5.6	6894	40
32	10.1	1510	323.2	4.67	8482	50
32	16.5	2132	528	4.04	9928	60
32	25.1	2810	803.2	3.5	11287	70
32	35.6	3508	1139.2	3.08	12573	80
32	48.5	4215	1552	2.72	13697	90
32	58.2	4760	1862.4	2.56	14460	100

900KV

HQ 9 x 5, 3-blade — 25 V

E3 3115 Brushless Motor 900KV - HQ 9 x 5, 3-blade — 25 V
VoltageV	CurrentA	Thrustg	PowerW	Efficiencyg/W	SpeedRPM	Throttle%
25	3.43	456	85.75	5.32	5910	30
25	6.88	820	172	4.77	7553	40
25	12.5	1296	312.5	4.15	9217	50
25	20.4	1837	510	3.6	10766	60
25	30.5	2370	762.5	3.11	12241	70
25	43.2	3028	1080	2.8	13551	80
25	58.2	3567	1455	2.45	14772	90
25	68.3	3980	1707.5	2.33	15530	100

GF 10 x 5, 3-blade — 25 V

E3 3115 Brushless Motor 900KV - GF 10 x 5, 3-blade — 25 V
VoltageV	CurrentA	Thrustg	PowerW	Efficiencyg/W	SpeedRPM	Throttle%
25	3.6	550	90	6.11	5652	30
25	7.72	1035	193	5.36	7365	40
25	13.5	1576	337.5	4.67	8963	50
25	21.5	2153	537.5	4.01	10415	60
25	31.1	2718	777.5	3.5	11525	70
25	42.4	3274	1060	3.09	12637	80
25	55.6	3827	1390	2.75	13668	90
25	73.4	4580	1835	2.5	14820	100

HQ 10 x 5, 3-blade — 25 V

E3 3115 Brushless Motor 900KV - HQ 10 x 5, 3-blade — 25 V
VoltageV	CurrentA	Thrustg	PowerW	Efficiencyg/W	SpeedRPM	Throttle%
25	4.1	628	102.5	6.13	5712	30
25	8.53	1087	213.25	5.1	7294	40
25	14.8	1596	370	4.31	8711	50
25	23.4	2170	585	3.71	10078	60
25	33.3	2774	832.5	3.33	11248	70
25	45.6	3347	1140	2.94	12276	80
25	59.7	3928	1492.5	2.63	13235	90
25	76.4	4540	1910	2.38	14210	100

1050KV

GF 9 x 4.5, 3-blade — 25 V

E3 3115 Brushless Motor 1050KV - GF 9 x 4.5, 3-blade — 25 V
VoltageV	CurrentA	Thrustg	PowerW	Efficiencyg/W	SpeedRPM	Throttle%
25	4.32	610	108	5.65	6925	30
25	8.4	1032	210	4.91	8765	40
25	14.3	1540	357.5	4.31	10607	50
25	22.5	2027	562.5	3.6	12214	60
25	32.3	2578	807.5	3.19	13707	70
25	44.2	3145	1105	2.85	15105	80
25	57.6	3630	1440	2.52	16466	90
25	76.4	4340	1910	2.27	17780	100

HQ 9 x 5, 3-blade — 25 V

E3 3115 Brushless Motor 1050KV - HQ 9 x 5, 3-blade — 25 V
VoltageV	CurrentA	Thrustg	PowerW	Efficiencyg/W	SpeedRPM	Throttle%
25	4.83	685	120.75	5.67	6661	30
25	9.84	1154	246	4.69	8472	40
25	17.1	1682	427.5	3.93	10216	50
25	26.7	2275	667.5	3.41	11772	60
25	38.2	2820	955	2.95	13020	70
25	51.5	3407	1287.5	2.65	14250	80
25	67.6	3940	1690	2.33	15357	90
25	87.8	4750	2195	2.16	16570	100

APPLICATIONS

Recommended use

8-10 inch FPV10 inch high-load and long-range aircraftcinematic FPV platformsfreestyle FPVprofessional and specialty builds