C motor

C-2814-20 Specifications
Description
说明/购买
Accessory&Graph
COBRA 2814 is a high efficiency and high torque brushless motor. It is made with super hardened neodymium-iron-boron magnets, high temperature and high purity oxygen-free copper wires, as well as 0.2 mm laminations. Plus its perfect full-trough rate and flat shape, COBRA 2814 motor offers maximum efficiency and minimum Eddy Current losses.

The integrally formed component made of CNC aviation aluminum ensures its super high precision. It has a 5.0mm shaft for extra strength, as well as two oversize ball bearings to support the shaft, which provide a perfect dynamic balance and a long life.

Ultra-flexible motor leads with high-temp silicone rubber insulation and 3.5mm bullet connectors already installed embody the humanization of Cobra product, and simplify your installation process.

Although 2814 motor only weighs 109 grams, it can offer about 2000g thrust. It is suitable for Fixed-Wing aircrafts with takeoff weight under 2KGs.

The motor comes with a complete set of propeller mount accessories, as well as the perfect packaging to protect the motor and its accessories.


Stator Diameter
28mm
Stator Thickness
14mm
No. of Stator
Arms
12
No. of Magnet
Poles
14
Motor Wind
20Turn Delta
Motor Kv
850(RPM / Volt)
No-Load Current
0.70Amps(10Volts)
Motor Resistance
(Rm) Per Phase
0.099Ohms
Motor Resistance
(Rm) Phase to Phase
0.066Ohms
Max Continuous
Current
25Amps
Max Continuous
Power
280Watts(3S)/370Watts(4S)
Weight
109Grams
Outside Diameter
35.0mm
Shaft Diameter
5.0mm
Body Length
34.1mm
Overall Shaft
Length
54.0mm
Prop Manf. & Size
Input Voltage
(V)
Current
(A)
Watts Input
(W)
Prop RPM
(/Min)
Pitch Speed
Thrust
(g)
Thrust Eff.
(g/W)
Recommen-dation
Curve
APC 9×7.5×2-E
11.1
13.23
146.9
7459
53
713
4.85
****
APC 9×9×2-E
11.1
16.44
182.4
7131
61
685
3.75
****
APC 10×5×2-E
11.1
11
122.1
7685
36
826
6.76
**
APC 10×6×2-E
11.1
12.2
135.5
7563
43
889
6.56
**
APC 10×7×2-E
11.1
13.92
154.5
7382
49
936
6.06
****
APC 10×10×2-E
11.1
20.59
228.5
6703
64
811
3.55
***
APC 11×5.5×2-E
11.1
14.94
165.9
7285
38
1100
6.63
****
APC 11×7×2-E
11.1
17.57
195
7021
47
1170
6
****
APC 11×8×2-E
11.1
18.72
207.8
6903
52
1139
5.48
****
APC 11×8.5×2-E
11.1
20.15
223.6
6752
54
1146
5.13
***
APC 11×10×2-E
11.1
23.7
263
6374
60
996
3.79
***
APC 12×6×2-E
11.1
18.88
209.5
6889
39
1323
6.31
****
APC 12×8×2-E
11.1
23.19
257.4
6439
49
1204
4.68
***
APC 13×4×2-E
11.1
16.79
186.3
7095
27
1334
7.16
****
APC 13×6.5×2-E
11.1
24.41
270.9
6304
39
1554
5.74
***
APC 13×8×2-E
11.1
26.06
289.2
6109
46
1542
5.33
*
GWS 9×5×3-DD
11.1
9.62
106.8
7825
37
729
6.83
**
GWS 10×6×2-DD
11.1
10.35
114.9
7757
44
810
7.05
**
GWS 10×6×3-DD
11.1
13.72
152.3
7409
42
1006
6.61
****
GWS 10×8×2-HD
11.1
17.03
189
7066
54
886
4.69
****
GWS 11×7×2-DD
11.1
15.8
175.4
7201
48
1143
6.52
****
GWS 12×6×2-HD
11.1
17.29
191.9
7046
40
1271
6.62
****
GWS 12×8×2-DD
11.1
22.08
245
6534
50
1371
5.6
***
APC 8×4×2-E
14.8
8.77
129.8
10730
41
743
5.73
**
APC 8×6×2-E
14.8
13.42
198.6
10195
58
905
4.56
****
APC 8×8×2-E
14.8
17.87
264.4
9696
74
836
3.16
****
APC 9×4.5×2-E
14.8
12.7
187.9
10278
44
1079
5.74
****
APC 9×6×2-E
14.8
14.79
218.9
10043
57
1096
5.01
****
APC 9×7.5×2-E
14.8
21.4
316.7
9309
66
1131
3.57
***
APC 9×9×2-E
14.8
24.63
364.5
8928
76
1097
3.01
***
APC 10×5×2-E
14.8
17.75
262.7
9708
46
1353
5.15
****
APC 10×6×2-E
14.8
19.32
286
9559
54
1450
5.07
****
APC 10×7×2-E
14.8
21.84
323.2
9250
61
1496
4.63
***
APC 11×5.5×2-E
14.8
23.77
351.7
9024
47
1760
5
***
APC 11×7×2-E
14.8
27.28
403.7
8604
57
1808
4.48
*
APC 13×4×2-E
14.8
26.29
389
8717
33
2219
5.45
*
APC 7×4×2-E
18.5
8.42
155.7
13579
51
768
4.93
**
APC 7×5×2-E
18.5
11.02
203.9
13241
63
814
3.99
**
APC 7×6×2-E
18.5
11.52
213.1
13177
75
879
4.13
**
APC 8×4×2-E
18.5
13.03
241.1
12994
49
1119
4.64
****
APC 8×6×2-E
18.5
20.29
375.4
12113
69
1300
3.46
***
APC 8×8×2-E
18.5
25.97
480.5
11426
87
1173
2.44
*
APC 9×4.5×2-E
18.5
18.46
341.6
12325
53
1580
4.63
****
APC 9×6×2-E
18.5
21.34
394.8
11953
68
1556
3.94
***
APC 10×5×2-E
18.5
25.88
478.7
11428
54
1901
3.97
*
Please note

1. “*”: The prop is too big for the motor and could make motor damaged, and should not be used.
2. “**” : The prop is too small to get good performance from the motor.
3. “***”: The prop can be used, but full throttle should be kept to short bursts.
4. “****”: The prop is sized right to get good power from the motor.