Overview
EMAX PRO Series PRO-2808 Brushless Motor for multirotor/FPV drone builds, offered in 1350KV, 1500KV, and 1900KV options. This motor is specified for 5"-7" propellers, with cell-count support depending on KV (3-6S for 1350KV/1500KV; 3-4S for 1900KV).
Key Features
- Precision bearing
- Steel shaft
- Anodizing
- 19 x 19 mm hole pattern
- Multi-strand winding
- 250 mm 18 AWG silicone wire
Specifications
Mechanical
| Model |
PRO-2808 |
| Framework |
12N14P |
| Motor dimensions |
33.2 x 37.3 mm |
| Length |
37.3 mm |
| Diameter |
33.2 mm |
| Bearing shaft |
4 mm |
| Prop adapter shaft thread |
M5 |
| Shaft thread |
CW |
| Mounting |
4 x M3; 19 mm pattern; Dia 19 |
| Lead |
18 AWG, 250 mm |
| Recommended propeller |
5"-7" |
Electrical (by KV option)
| KV option |
No. of cells |
Idle current (10V) |
Internal resistance |
Peak current |
Max power |
Weight (W/O silicone wire) |
| 1350KV |
3-6S |
1.4A |
53 mohms |
59A (6S) |
1480W (6S) |
50.7 g |
| 1500KV |
3-6S |
1.6A |
46 mohms |
62A (6S) |
1550W (6S) |
50.7 g |
| 1900KV |
3-4S |
2.2A |
35 mohms |
58A (4S) |
970W (4S) |
50.4 g |
Performance Data
PRO-2808-1350KV (25.2V)
Gemfan7040 3-blade propeller
| Voltage (V) |
Current (A) |
Thrust (g) |
Power (W) |
Efficiency (g/W) |
Speed (RPM) |
| 25.2 |
2.3 |
300 |
57.96 |
5.18 |
8290 |
| 25.2 |
6.7 |
700 |
168.84 |
4.15 |
12160 |
| 25.2 |
10 |
960 |
252.00 |
3.81 |
14100 |
| 25.2 |
15.5 |
1310 |
390.60 |
3.35 |
16290 |
| 25.2 |
22.6 |
1640 |
569.52 |
2.88 |
18140 |
| 25.2 |
31.2 |
2120 |
786.24 |
2.70 |
20100 |
| 25.2 |
41.4 |
2520 |
1043.28 |
2.42 |
21600 |
| 25.2 |
51 |
2780 |
1285.20 |
2.16 |
Max |
AVAN7040 3-blade propeller
| Voltage (V) |
Current (A) |
Thrust (g) |
Power (W) |
Efficiency (g/W) |
Speed (RPM) |
| 25.2 |
2.2 |
290 |
55.44 |
5.23 |
9120 |
| 25.2 |
6.1 |
670 |
153.72 |
4.36 |
13400 |
| 25.2 |
8.6 |
870 |
216.72 |
4.01 |
15200 |
| 25.2 |
12.2 |
1150 |
307.44 |
3.74 |
17300 |
| 25.2 |
17.8 |
1510 |
448.56 |
3.37 |
19600 |
| 25.2 |
24.8 |
1890 |
624.96 |
3.02 |
21700 |
| 25.2 |
33.2 |
2280 |
836.64 |
2.73 |
23600 |
| 25.2 |
40.8 |
2570 |
1028.16 |
2.50 |
Max |
HQ 7 x 3.5 x 3 blade propeller
| Voltage (V) |
Current (A) |
Thrust (g) |
Power (W) |
Efficiency (g/W) |
Speed (RPM) |
| 25.2 |
2.3 |
300 |
57.96 |
5.18 |
7930 |
| 25.2 |
6.9 |
720 |
173.88 |
4.14 |
11740 |
| 25.2 |
10.8 |
1020 |
272.16 |
3.75 |
13800 |
| 25.2 |
16.6 |
1400 |
418.32 |
3.35 |
16200 |
| 25.2 |
24.1 |
1770 |
607.32 |
2.91 |
17890 |
| 25.2 |
32.5 |
2170 |
819.00 |
2.65 |
19800 |
| 25.2 |
42.5 |
2550 |
1071.00 |
2.38 |
21300 |
| 25.2 |
56.7 |
2760 |
1428.84 |
1.93 |
Max |
HQ 7 x 4 x 3 blade propeller
| Voltage (V) |
Current (A) |
Thrust (g) |
Power (W) |
Efficiency (g/W) |
Speed (RPM) |
| 25.2 |
2.4 |
310 |
60.48 |
5.13 |
7550 |
| 25.2 |
7.4 |
740 |
186.48 |
3.97 |
11320 |
| 25.2 |
12.2 |
1070 |
307.44 |
3.48 |
13370 |
| 25.2 |
18.3 |
1460 |
461.16 |
3.17 |
15430 |
| 25.2 |
26.9 |
1810 |
677.88 |
2.67 |
17100 |
| 25.2 |
35.7 |
2220 |
899.64 |
2.47 |
18840 |
| 25.2 |
46.6 |
2590 |
1174.32 |
2.21 |
20200 |
| 25.2 |
58.5 |
2820 |
1474.20 |
1.91 |
Max |
PRO-2808-1500KV (25.2V)
Gemfan7040 3-blade propeller
| Voltage (V) |
Current (A) |
Thrust (g) |
Power (W) |
Efficiency (g/W) |
Speed (RPM) |
| 25.2 |
2.8 |
350 |
70.56 |
4.96 |
8890 |
| 25.2 |
8.4 |
820 |
211.68 |
3.87 |
13100 |
| 25.2 |
12.6 |
1110 |
317.52 |
3.50 |
15090 |
| 25.2 |
19.5 |
1500 |
491.40 |
3.05 |
17350 |
| 25.2 |
28.9 |
1990 |
728.28 |
2.73 |
19500 |
| 25.2 |
39.4 |
2410 |
992.88 |
2.43 |
21200 |
| 25.2 |
51 |
2690 |
1285.20 |
2.09 |
22800 |
| 25.2 |
61.4 |
2920 |
1547.28 |
1.89 |
Max |
AVAN7040 3-blade propeller
| Voltage (V) |
Current (A) |
Thrust (g) |
Power (W) |
Efficiency (g/W) |
Speed (RPM) |
| 25.2 |
2.7 |
350 |
68.04 |
5.14 |
9850 |
| 25.2 |
7.7 |
800 |
194.04 |
4.12 |
14590 |
| 25.2 |
10.8 |
1030 |
272.16 |
3.78 |
16420 |
| 25.2 |
15.4 |
1340 |
388.08 |
3.45 |
18550 |
| 25.2 |
22.9 |
1780 |
577.08 |
3.08 |
21140 |
| 25.2 |
31.7 |
2170 |
798.84 |
2.72 |
23170 |
| 25.2 |
41.4 |
2520 |
1043.28 |
2.42 |
25100 |
| 25.2 |
51.5 |
2760 |
1297.80 |
2.13 |
Max |
PRO-2808-1900KV (16.8V)
Gemfan7040 3-blade propeller
| Voltage (V) |
Current (A) |
Thrust (g) |
Power (W) |
Efficiency (g/W) |
Speed (RPM) |
| 16.8 |
2.7 |
240 |
45.36 |
5.29 |
7520 |
| 16.8 |
8.1 |
570 |
136.08 |
4.19 |
11100 |
| 16.8 |
11.6 |
760 |
194.88 |
3.90 |
12660 |
| 16.8 |
17.7 |
1030 |
297.36 |
3.46 |
14620 |
| 16.8 |
25.4 |
1340 |
426.72 |
3.14 |
16510 |
| 16.8 |
34.5 |
1620 |
579.60 |
2.80 |
18020 |
| 16.8 |
45.1 |
1940 |
757.68 |
2.56 |
19520 |
| 16.8 |
56.2 |
2300 |
944.16 |
2.44 |
Max |
AVAN7040 3-blade propeller
| Voltage (V) |
Current (A) |
Thrust (g) |
Power (W) |
Efficiency (g/W) |
Speed (RPM) |
| 16.8 |
2.6 |
240 |
43.68 |
5.49 |
8300 |
| 16.8 |
7.4 |
560 |
124.32 |
4.50 |
12640 |
| 16.8 |
10.1 |
710 |
169.68 |
4.18 |
13840 |
| 16.8 |
14.1 |
920 |
236.88 |
3.88 |
15650 |
| 16.8 |
20.3 |
1190 |
341.04 |
3.49 |
17700 |
| 16.8 |
27.5 |
1490 |
462.00 |
3.23 |
19580 |
| 16.8 |
36.5 |
1790 |
613.20 |
2.92 |
21320 |
| 16.8 |
45.2 |
2080 |
759.36 |
2.74 |
Max |
HQ 7 x 3.5 x 3 blade propeller
| Voltage (V) |
Current (A) |
Thrust (g) |
Power (W) |
Efficiency (g/W) |
Speed (RPM) |
| 16.8 |
2.8 |
250 |
47.04 |
5.31 |
7230 |
| 16.8 |
8.4 |
590 |
141.12 |
4.18 |
10730 |
| 16.8 |
12.5 |
800 |
210.00 |
3.81 |
12350 |
| 16.8 |
19.1 |
1100 |
320.88 |
3.43 |
14320 |
| 16.8 |
26.8 |
1410 |
450.24 |
3.13 |
16160 |
| 16.8 |
36.5 |
1710 |
613.20 |
2.79 |
17640 |
| 16.8 |
47.1 |
2010 |
791.28 |
2.54 |
19200 |
| 16.8 |
57.8 |
2320 |
971.04 |
2.39 |
Max |
What’s Included
- 5 x M3 x 10 screw
- 5 x M3 x 8 screw
- 1 x Aluminum M5 nylock nut
- 1 x Washer and screw for shaft
Applications
- Multirotor / FPV drone propulsion setups using 5"-7" propellers (per motor KV and supported cell count)
For installation or selection support (KV, prop, and voltage matching), contact support@rcdrone.top or visit https://rcdrone.top/.
Details
