EMAX ECO II 2004

EMAX ECO II 2004
Image: racedayquads.com
Stator2004
KV options2000, 2400, 3000
Weight18.0 g
Shaft1.5mm
Max cells3-6S
Configuration12N14P
Dimensions24.7x19.2 mm
Mount12x12mm
Max thrust1170 g
Price (approx.)16.49 USD

At 18 g it is 1.4 g heavier than average across the 5 2004-class motors in our database (avg 16.6 g).

Thrust data (EMAX bench test)

KVPropBatteryThrottleCurrentRPMThrustEfficiency
1600 Gemfan SL4525-3 6S 40% 2.5 A 18200 244 g 4.07 g/W
1600 Gemfan SL4525-3 6S 50% 3.5 A 20300 312 g 3.71 g/W
1600 Gemfan SL4525-3 6S 60% 4.3 A 22200 376 g 3.64 g/W
1600 Gemfan SL4525-3 6S 70% 6.1 A 24800 482 g 3.29 g/W
1600 Gemfan SL4525-3 6S 80% 8.4 A 26800 582 g 2.89 g/W
1600 Gemfan SL4525-3 6S 90% 9.8 A 29400 665 g 2.83 g/W
1600 Gemfan SL4525-3 6S 100% 10.5 A — 695 g 2.76 g/W
1600 EMAX AVAN 5120-3 6S 40% 2.9 A 15200 308 g 4.43 g/W
1600 EMAX AVAN 5120-3 6S 50% 4.5 A 17400 415 g 3.84 g/W
1600 EMAX AVAN 5120-3 6S 60% 6.4 A 19600 543 g 3.54 g/W
1600 EMAX AVAN 5120-3 6S 70% 8.9 A 22200 685 g 3.21 g/W
1600 EMAX AVAN 5120-3 6S 80% 12.4 A 23600 825 g 2.77 g/W
1600 EMAX AVAN 5120-3 6S 90% 14.6 A 25900 915 g 2.61 g/W
1600 EMAX AVAN 5120-3 6S 100% 15.2 A — 951 g 2.61 g/W
1600 Gemfan SL5125-3 6S 40% 2.8 A 16100 294 g 4.38 g/W
1600 Gemfan SL5125-3 6S 50% 4.1 A 18100 378 g 3.84 g/W
1600 Gemfan SL5125-3 6S 60% 5.9 A 20400 496 g 3.5 g/W
1600 Gemfan SL5125-3 6S 70% 8.1 A 22800 630 g 3.24 g/W
1600 Gemfan SL5125-3 6S 80% 10.9 A 24800 759 g 2.9 g/W
1600 Gemfan SL5125-3 6S 90% 13.8 A 25830 880 g 2.66 g/W
1600 Gemfan SL5125-3 6S 100% 14.1 A — 935 g 2.76 g/W
1600 Gemfan SL5126-2 6S 40% 2.8 A 16300 297 g 4.42 g/W
1600 Gemfan SL5126-2 6S 50% 4.1 A 18300 380 g 3.86 g/W
1600 Gemfan SL5126-2 6S 60% 5.8 A 20600 495 g 3.56 g/W
1600 Gemfan SL5126-2 6S 70% 7.9 A 22900 615 g 3.24 g/W
1600 Gemfan SL5126-2 6S 80% 10.7 A 25000 765 g 2.98 g/W
1600 Gemfan SL5126-2 6S 90% 12.9 A 26500 868 g 2.8 g/W
1600 Gemfan SL5126-2 6S 100% 13.5 A — 915 g 2.82 g/W
2000 EMAX AVAN 5120-3 4S 40% 2.9 A 13200 224 g 4.83 g/W
2000 EMAX AVAN 5120-3 4S 50% 4.2 A 15300 300 g 4.46 g/W
2000 EMAX AVAN 5120-3 4S 60% 6.1 A 16900 389 g 3.99 g/W
2000 EMAX AVAN 5120-3 4S 70% 8.2 A 18800 490 g 3.73 g/W
2000 EMAX AVAN 5120-3 4S 80% 11.1 A 20800 615 g 3.46 g/W
2000 EMAX AVAN 5120-3 4S 90% 12.8 A 22100 695 g 3.39 g/W
2000 EMAX AVAN 5120-3 4S 100% 14 A — 715 g 3.19 g/W
2000 Gemfan SL5125-3 4S 40% 2.8 A 13900 213 g 4.75 g/W
2000 Gemfan SL5125-3 4S 50% 3.9 A 15600 277 g 4.44 g/W
2000 Gemfan SL5125-3 4S 60% 5.4 A 17500 358 g 4.14 g/W
2000 Gemfan SL5125-3 4S 70% 7.1 A 19300 445 g 3.92 g/W
2000 Gemfan SL5125-3 4S 80% 10 A 21600 574 g 3.59 g/W
2000 Gemfan SL5125-3 4S 90% 11.6 A 23200 638 g 3.44 g/W
2000 Gemfan SL5125-3 4S 100% 12.5 A — 670 g 3.35 g/W
2000 Gemfan 4023-3 6S 40% 3.4 A 22300 289 g 3.54 g/W
2000 Gemfan 4023-3 6S 50% 5 A 25400 379 g 3.16 g/W
2000 Gemfan 4023-3 6S 60% 6.1 A 26800 424 g 2.9 g/W
2000 Gemfan 4023-3 6S 70% 7.6 A 29300 513 g 2.81 g/W
2000 Gemfan 4023-3 6S 80% 10.6 A 32900 668 g 2.63 g/W
2000 Gemfan 4023-3 6S 90% 12.8 A 35300 736 g 2.4 g/W
2000 Gemfan 4023-3 6S 100% 13.4 A — 797 g 2.48 g/W
2000 Gemfan SL4525-3 6S 40% 3.9 A 20600 330 g 3.53 g/W
2000 Gemfan SL4525-3 6S 50% 5.8 A 23500 434 g 3.12 g/W
2000 Gemfan SL4525-3 6S 60% 7.3 A 25200 501 g 2.86 g/W
2000 Gemfan SL4525-3 6S 70% 9.8 A 27200 632 g 2.69 g/W
2000 Gemfan SL4525-3 6S 80% 12.2 A 30000 732 g 2.5 g/W
2000 Gemfan SL4525-3 6S 90% 16.5 A 32300 826 g 2.09 g/W
2000 Gemfan SL4525-3 6S 100% 17 A — 910 g 2.23 g/W
2000 Gemfan SL5125-3 6S 40% 4.5 A 18300 388 g 3.59 g/W
2000 Gemfan SL5125-3 6S 50% 6.8 A 20500 507 g 3.11 g/W
2000 Gemfan SL5125-3 6S 60% 9.4 A 22900 653 g 2.89 g/W
2000 Gemfan SL5125-3 6S 70% 12.5 A 25000 811 g 2.7 g/W
2000 Gemfan SL5125-3 6S 80% 17.4 A 28350 965 g 2.31 g/W
2000 Gemfan SL5125-3 6S 90% 19.6 A 29630 1050 g 2.23 g/W
2000 Gemfan SL5125-3 6S 100% 21.5 A — 1130 g 2.19 g/W
2400 EMAX AVAN 5120-3 4S 40% 4.4 A 15800 293 g 4.16 g/W
2400 EMAX AVAN 5120-3 4S 50% 6.7 A 16900 387 g 3.61 g/W
2400 EMAX AVAN 5120-3 4S 60% 9.2 A 18900 488 g 3.32 g/W
2400 EMAX AVAN 5120-3 4S 70% 12.6 A 20600 614 g 3.05 g/W
2400 EMAX AVAN 5120-3 4S 80% 17.5 A 22800 753 g 2.69 g/W
2400 EMAX AVAN 5120-3 4S 90% 20.7 A 25100 824 g 2.49 g/W
2400 EMAX AVAN 5120-3 4S 100% 21.8 A — 864 g 2.48 g/W
2400 Gemfan SL5125-3 4S 40% 4.1 A 15600 268 g 4.09 g/W
2400 Gemfan SL5125-3 4S 50% 6.1 A 17800 353 g 3.62 g/W
2400 Gemfan SL5125-3 4S 60% 8.2 A 19600 451 g 3.44 g/W
2400 Gemfan SL5125-3 4S 70% 11.5 A 22200 594 g 3.23 g/W
2400 Gemfan SL5125-3 4S 80% 15.1 A 24000 704 g 2.91 g/W
2400 Gemfan SL5125-3 4S 90% 18.3 A 25300 808 g 2.76 g/W
2400 Gemfan SL5125-3 4S 100% 19.2 A — 850 g 2.77 g/W
2400 Gemfan SL5126-2 4S 40% 4.2 A 15800 281 g 4.18 g/W
2400 Gemfan SL5126-2 4S 50% 6.1 A 17800 362 g 3.71 g/W
2400 Gemfan SL5126-2 4S 60% 8.2 A 19900 451 g 3.44 g/W
2400 Gemfan SL5126-2 4S 70% 11 A 21600 570 g 3.24 g/W
2400 Gemfan SL5126-2 4S 80% 14.8 A 23200 687 g 2.9 g/W
2400 Gemfan SL5126-2 4S 90% 17.6 A 25800 786 g 2.79 g/W
2400 Gemfan SL5126-2 4S 100% 18.8 A — 825 g 2.74 g/W
2400 HQ T4025-2 6S 40% 5.2 A 26600 351 g 2.81 g/W
2400 HQ T4025-2 6S 50% 6.7 A 28500 414 g 2.57 g/W
2400 HQ T4025-2 6S 60% 8 A 30400 471 g 2.45 g/W
2400 HQ T4025-2 6S 70% 10.3 A 33400 579 g 2.34 g/W
2400 HQ T4025-2 6S 80% 13.2 A 36800 728 g 2.3 g/W
2400 HQ T4025-2 6S 90% 15.3 A 38900 802 g 2.18 g/W
2400 HQ T4025-2 6S 100% 16.1 A — 827 g 2.14 g/W
2400 Gemfan 4023-3 6S 40% 5.4 A 25700 376 g 2.9 g/W
2400 Gemfan 4023-3 6S 50% 7.5 A 27400 442 g 2.46 g/W
2400 Gemfan 4023-3 6S 60% 9.1 A 29700 535 g 2.45 g/W
2400 Gemfan 4023-3 6S 70% 11.8 A 32400 659 g 2.33 g/W
2400 Gemfan 4023-3 6S 80% 15.1 A 35600 804 g 2.22 g/W
2400 Gemfan 4023-3 6S 90% 17.6 A 38200 885 g 2.1 g/W
2400 Gemfan 4023-3 6S 100% 18.8 A — 930 g 2.06 g/W
3000 HQ T3x3x3-2 6S 40% 5.9 A 30500 300 g 2.29 g/W
3000 HQ T3x3x3-2 6S 50% 7.7 A 33500 364 g 2.13 g/W
3000 HQ T3x3x3-2 6S 60% 8.3 A 34200 378 g 2.05 g/W
3000 HQ T3x3x3-2 6S 70% 10.7 A 37800 472 g 1.99 g/W
3000 HQ T3x3x3-2 6S 80% 11.6 A 40300 529 g 2.05 g/W
3000 HQ T3x3x3-2 6S 90% 12.2 A 41800 545 g 2.01 g/W
3000 HQ T3x3x3-2 6S 100% 12.7 A — 561 g 1.99 g/W
3000 Gemfan 3520-3 6S 40% 6.1 A 31500 345 g 2.55 g/W
3000 Gemfan 3520-3 6S 50% 7.5 A 34000 407 g 2.44 g/W
3000 Gemfan 3520-3 6S 60% 8.1 A 34600 414 g 2.3 g/W
3000 Gemfan 3520-3 6S 70% 10.2 A 38000 516 g 2.28 g/W
3000 Gemfan 3520-3 6S 80% 11.1 A 40500 582 g 2.36 g/W
3000 Gemfan 3520-3 6S 90% 11.8 A 41900 603 g 2.3 g/W
3000 Gemfan 3520-3 6S 100% 12.4 A — 636 g 2.31 g/W
3000 EMAX AVAN 5120-3 4S 40% 6.7 A 16700 378 g 3.53 g/W
3000 EMAX AVAN 5120-3 4S 50% 9.9 A 18600 477 g 3.01 g/W
3000 EMAX AVAN 5120-3 4S 60% 13.9 A 21100 629 g 2.83 g/W
3000 EMAX AVAN 5120-3 4S 70% 19.4 A 23000 796 g 2.56 g/W
3000 EMAX AVAN 5120-3 4S 80% 26.3 A 24800 980 g 2.33 g/W
3000 EMAX AVAN 5120-3 4S 90% 30.5 A 25970 1060 g 2.17 g/W
3000 EMAX AVAN 5120-3 4S 100% 31.6 A — 1170 g 2.31 g/W
3000 Gemfan SL5125-3 4S 40% 6.5 A 17800 370 g 3.56 g/W
3000 Gemfan SL5125-3 4S 50% 9.5 A 19800 476 g 3.13 g/W
3000 Gemfan SL5125-3 4S 60% 12 A 22200 598 g 3.11 g/W
3000 Gemfan SL5125-3 4S 70% 17.8 A 24600 764 g 2.68 g/W
3000 Gemfan SL5125-3 4S 80% 24.7 A 26400 920 g 2.33 g/W
3000 Gemfan SL5125-3 4S 90% 29.6 A 28680 1010 g 2.13 g/W
3000 Gemfan SL5125-3 4S 100% 30.2 A — 1090 g 2.26 g/W

Manufacturer bench figures (4S, EMAX AVAN 5120-3, 100% throttle, 3000KV; manufacturer bench, throttle sweep 40-100%; 4S rows at 16 V, 6S rows at 22.2-24 V); real-world thrust varies with ESC, battery sag and prop condition.

Thrust-to-weight with this motor

RPM & prop speed on this motor

Flies on these BNF quads

Props in this motor's class

PropSizeBladesWeight
Gemfan Long Range 5126-2 Durable 1.5mm T-Mount 5.1x2.7 2 2.6 g
HQProp DP 5.1x2.5x3 5.1x2.5 3 3.1 g
HQProp Juicy J37 4.9x3.7 3 3.4 g
HQProp Juicy J40 5.1x4.0 3 3.4 g
Gemfan 4935 Sbang 3-Blade 4.9x3.5 3 3.45 g

Where this data comes from

Weight 16.4-16.6 g depending on KV (manufacturer, w/o wire); 4-6S rating (3000KV: 3-6S); a 1600KV variant exists on EMAX's store

Related 2004-class motors

Guides