ECOII Series / 43XX / ECO II

ECO II 4315 Brushless Motor

A high-power 4315-class aircraft motor with four KV options for 13 to 15 inch propeller platforms and demanding aerial propulsion systems.

360KV380KV450KV520KV

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KEY FEATURES

Designed for FPV performance tuning

Four KV choices cover high-power 6S, 8S, and 12S test configurations with 13 to 15 inch propellers.
Precision bearings, a steel shaft, multi-strand winding, and an anodized motor structure support reliable high-load operation.
A 30 x 30 mm four-hole M4 mounting pattern, 400 mm 16 AWG silicone leads, and an M6 propeller shaft simplify aircraft integration.
Verified load-test data is provided for every KV option, including voltage, current, thrust, power, efficiency, RPM, and throttle.

SPECIFICATIONS

VARIANT SPECIFICATIONS

KV configuration matrix

KV	Battery cells	Propeller	Idle current	Internal resistance	Peak current	Maximum power
360KV	6-12S	13-15 inch	1.2 A @ 10 V	53 mOhm	63.5 A @ 12S	2992 W @ 12S
380KV	6-8S	13-15 inch	1.3 A @ 10 V	51 mOhm	72.9 A @ 8S	2352 W @ 8S
450KV	6-8S	13 inch	1.6 A @ 10 V	43 mOhm	75.4 A @ 8S	2428 W @ 8S
520KV	6S	13 inch	1.9 A @ 10 V	37 mOhm	74.6 A @ 6S	1792 W @ 6S

OFFICIAL GRAPHICS

LOAD TEST DATA

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

360KV

ECO II 4315 Brushless Motor 360KV - GF1308, 3-blade
VoltageV	CurrentA	Thrustg	PowerW	Efficiencyg/W	SpeedRPM	Throttle%
47.93	2.36	865	113.11	7.65	4555	30%
47.88	5.04	1554	241.32	6.44	6015	40%
47.81	9.11	2364	435.55	5.43	7400	50%
47.74	14.73	3279	703.21	4.66	8699	60%
47.63	22.24	4316	1059.29	4.07	9950	70%
47.51	31.89	5415	1515.09	3.57	11100	80%
47.33	44.51	6634	2106.66	3.15	12243	90%
47.09	63.53	7962	2991.63	2.66	13305	Max

ECO II 4315 Brushless Motor 360KV - HQ1310, 3-blade
VoltageV	CurrentA	Thrustg	PowerW	Efficiencyg/W	SpeedRPM	Throttle%
33.34	2.33	648	77.68	8.34	3080	30%
33.3	4.94	1200	164.5	7.29	4044	40%
33.24	8.83	1782	293.51	6.07	4946	50%
33.16	14.1	2426	467.56	5.19	5801	60%
33.04	21	3126	693.84	4.51	6610	70%
32.91	29.7	3883	977.43	3.97	7348	80%
32.75	40.8	4676	1336.2	3.5	8063	90%
32.53	54.2	5665	1763.13	3.21	8777	Max

ECO II 4315 Brushless Motor 360KV - HQ1507, 3-blade
VoltageV	CurrentA	Thrustg	PowerW	Efficiencyg/W	SpeedRPM	Throttle%
33.3	2.43	821	80.92	10.15	3071	30%
33.26	5.21	1435	173.28	8.28	4022	40%
33.19	9.4	2153	311.99	6.9	4903	50%
33.08	15.1	2983	499.51	5.97	5730	60%
32.97	22.7	3864	748.42	5.16	6521	70%
32.83	32.2	4798	1057.13	4.54	7231	80%
32.65	44.7	5872	1459.46	4.02	7917	90%
32.41	61.2	7032	1983.49	3.55	8537	Max

380KV

ECO II 4315 Brushless Motor 380KV - HQ1310, 3-blade
VoltageV	CurrentA	Thrustg	PowerW	Efficiencyg/W	SpeedRPM	Throttle%
33.3	2.78	711	92.57	7.68	3267	30%
33.26	5.9	1305	196.23	6.65	4277	40%
33.18	10.5	1985	348.39	5.7	5221	50%
33.07	16.8	2714	555.58	4.89	6125	60%
32.95	24.8	3464	817.16	4.24	6953	70%
32.8	34.9	4279	1144.72	3.74	7725	80%
32.61	48.1	5121	1568.54	3.26	8483	90%
32.37	65.2	6198	2110.52	2.94	9176	Max

ECO II 4315 Brushless Motor 380KV - GF1309, 3-blade
VoltageV	CurrentA	Thrustg	PowerW	Efficiencyg/W	SpeedRPM	Throttle%
33.31	2.55	704	84.94	8.29	3299	30%
33.26	5.41	1282	179.94	7.12	4325	40%
33.2	9.7	1960	322.04	6.09	5287	50%
33.09	15.5	2725	512.9	5.31	6216	60%
32.98	22.8	3487	751.94	4.64	7062	70%
32.84	32.2	4383	1057.45	4.14	7869	80%
32.66	44.5	5396	1453.37	3.71	8642	90%
32.46	58.8	6390	1908.65	3.35	9392	Max

ECO II 4315 Brushless Motor 380KV - HQ1507, 3-blade
VoltageV	CurrentA	Thrustg	PowerW	Efficiencyg/W	SpeedRPM	Throttle%
33.31	2.84	897	94.6	9.48	3248	30%
33.26	6.14	1574	204.22	7.71	4224	40%
33.18	11.1	2360	368.3	6.41	5164	50%
33.06	17.8	3273	588.47	5.56	6033	60%
32.93	26.6	4206	875.94	4.8	6837	70%
32.78	37.7	5225	1235.81	4.23	7571	80%
32.57	52.7	6403	1716.44	3.73	8257	90%
32.27	72.9	7579	2352.48	3.22	8829	Max

450KV

ECO II 4315 Brushless Motor 450KV - HQ1308, 3-blade
VoltageV	CurrentA	Thrustg	PowerW	Efficiencyg/W	SpeedRPM	Throttle%
33.26	2.97	764	98.78	7.73	3795	30%
33.21	6.27	1418	208.23	6.81	4971	40%
33.11	11.2	2144	370.83	5.78	6074	50%
33	17.9	2940	590.7	4.98	7111	60%
32.87	26.5	3845	871.06	4.41	8041	70%
32.7	37.9	4843	1239.33	3.91	8965	80%
32.49	51.7	5865	1679.73	3.49	9814	90%
32.24	68.8	6919	2218.11	3.12	10598	Max

ECO II 4315 Brushless Motor 450KV - HQ1309, 3-blade
VoltageV	CurrentA	Thrustg	PowerW	Efficiencyg/W	SpeedRPM	Throttle%
33.31	3.24	853	107.92	7.9	3770	30%
33.25	6.89	1484	229.09	6.48	4933	40%
33.16	12.3	2204	407.87	5.4	6001	50%
33.03	19.6	2985	647.39	4.61	7010	60%
32.89	28.6	3792	940.65	4.03	7926	70%
32.72	40.6	4691	1328.43	3.53	8842	80%
32.5	56.1	5665	1823.25	3.11	9658	90%
32.2	75.4	6720	2427.88	2.77	10393	Max

520KV

ECO II 4315 Brushless Motor 520KV - HQ1308, 3-blade
VoltageV	CurrentA	Thrustg	PowerW	Efficiencyg/W	SpeedRPM	Throttle%
25.12	2.69	541	67.57	8.01	3304	30%
25.06	5.64	1014	141.34	7.17	4339	40%
25	10.05	1604	251.25	6.38	5300	50%
24.9	16	2232	398.4	5.6	6224	60%
24.8	23.61	2895	585.53	4.94	7047	70%
24.68	32.95	3619	813.21	4.45	7863	80%
24.51	44.66	4403	1094.62	4.02	8638	90%
24.31	58.94	5268	1432.83	3.68	9371	Max

ECO II 4315 Brushless Motor 520KV - HQ1309, 3-blade
VoltageV	CurrentA	Thrustg	PowerW	Efficiencyg/W	SpeedRPM	Throttle%
25.04	2.93	624	73.37	8.51	3261	30%
25	6.13	1094	153.25	7.14	4266	40%
24.93	10.82	1642	269.74	6.09	5216	50%
24.84	17.17	2241	426.5	5.25	6113	60%
24.72	25.33	2882	626.16	4.6	6937	70%
24.58	35.12	3552	863.25	4.11	7701	80%
24.4	47.83	4272	1167.05	3.66	8431	90%
24.19	62.7	5079	1516.71	3.35	9151	Max

ECO II 4315 Brushless Motor 520KV - HQ1310, 3-blade
VoltageV	CurrentA	Thrustg	PowerW	Efficiencyg/W	SpeedRPM	Throttle%
25.05	3.51	664	87.93	7.55	3190	30%
24.99	7.36	1205	183.93	6.55	4140	40%
24.91	13.07	1837	325.57	5.64	5034	50%
24.8	20.56	2487	509.89	4.88	5857	60%
24.65	30.41	3183	749.61	4.25	6628	70%
24.48	42.09	3884	1030.36	3.77	7326	80%
24.28	56.38	4595	1368.91	3.36	8014	90%
24.02	74.61	5420	1792.13	3.02	8629	Max

APPLICATIONS

large FPVlarge multirotor platforms13-15 inch propeller systemsheavy-lift aerial propulsionengineering and custom aircraft projectsspecialty builds