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Cobra
C2820/14 Motor Propeller Data |
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Motor Wind |
Motor Kv |
No-Load Current |
Motor Resistance |
I Max |
P Max (3S) |
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14-Turn
Delta |
840 RPM/Volt |
Io = 1.00 Amps @ 10v |
Rm = 0.047 Ohms |
36 Amps |
400 W |
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Outside
Diameter |
Body Length |
Total Shaft Length |
Shaft Diameter |
Motor Weight |
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35.0
mm, 1.38 in. |
40.0 mm, 1.57 in. |
60.0 mm, 2.36 in. |
5.00 mm, 0.197 in. |
140 gm, 4.94 oz |
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Prop |
Prop |
Input |
Motor |
Watts |
Prop |
Pitch |
Thrust |
Thrust |
Thrust Eff. |
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Manf. |
Size |
Voltage |
Amps |
Input |
RPM |
Speed |
Grams |
Ounces |
Grams/W |
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APC |
9x7.5-E |
11.1 |
14.86 |
164.9 |
7,784 |
55.3 |
777 |
27.41 |
4.71 |
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APC |
9x9-E |
11.1 |
18.47 |
205.0 |
7,528 |
64.2 |
778 |
27.44 |
3.80 |
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APC |
10x7-E |
11.1 |
15.69 |
174.1 |
7,736 |
51.3 |
1035 |
36.51 |
5.94 |
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APC |
10x10-E |
11.1 |
23.29 |
258.6 |
7,191 |
68.1 |
928 |
32.73 |
3.59 |
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APC |
11x5.5-E |
11.1 |
16.93 |
187.9 |
7,637 |
39.8 |
1221 |
43.07 |
6.50 |
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APC |
11x7-E |
11.1 |
20.06 |
222.6 |
7,411 |
49.1 |
1301 |
45.89 |
5.84 |
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APC |
11x8-E |
11.1 |
21.88 |
242.9 |
7,281 |
55.2 |
1255 |
44.27 |
5.17 |
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APC |
11x8.5-E |
11.1 |
23.25 |
258.0 |
7,147 |
57.5 |
1298 |
45.79 |
5.03 |
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APC |
11x10-E |
11.1 |
27.78 |
308.4 |
6,874 |
65.1 |
1162 |
40.99 |
3.77 |
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APC |
12x6-E |
11.1 |
21.72 |
241.1 |
7,292 |
41.4 |
1491 |
52.59 |
6.18 |
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APC |
12x8-E |
11.1 |
27.40 |
304.1 |
6,908 |
52.3 |
1379 |
48.64 |
4.53 |
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APC |
12x10-E |
11.1 |
30.74 |
341.2 |
6,617 |
62.7 |
1486 |
52.42 |
4.35 |
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APC |
13x4-E |
11.1 |
17.62 |
195.6 |
7,584 |
28.7 |
1391 |
49.07 |
7.11 |
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APC |
13x6.5-E |
11.1 |
28.98 |
321.6 |
6,777 |
41.7 |
1805 |
63.67 |
5.61 |
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APC |
13x8-E |
11.1 |
31.05 |
344.7 |
6,607 |
50.1 |
1802 |
63.56 |
5.23 |
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APC |
13x10-E |
11.1 |
35.86 |
398.0 |
6,192 |
58.6 |
1704 |
60.11 |
4.28 |
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APC |
14x7-E |
11.1 |
34.00 |
377.4 |
6,370 |
42.2 |
2032 |
71.68 |
5.38 |
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APC |
14x8.5-E |
11.1 |
36.21 |
401.9 |
6,184 |
49.8 |
2051 |
72.35 |
5.10 |
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APC |
14x10-E |
11.1 |
36.19 |
401.7 |
6,204 |
58.8 |
2037 |
71.85 |
5.07 |
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APC |
15x4-E |
11.1 |
29.11 |
323.1 |
6,790 |
25.7 |
2093 |
73.83 |
6.48 |
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APC |
15x6-E |
11.1 |
35.82 |
397.6 |
6,243 |
35.5 |
2264 |
79.86 |
5.69 |
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APC |
15x8-E |
11.1 |
38.13 |
423.3 |
6,052 |
45.8 |
2259 |
79.68 |
5.34 |
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Prop |
Prop |
Input |
Motor |
Watts |
Prop |
Pitch |
Thrust |
Thrust |
Thrust Eff. |
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Manf. |
Size |
Voltage |
Amps |
Input |
RPM |
Speed |
Grams |
Ounces |
Grams/W |
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APC |
8x8-E |
14.8 |
20.46 |
302.8 |
10,166 |
77.0 |
921 |
32.49 |
3.04 |
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APC |
9x6-E |
14.8 |
16.36 |
242.1 |
10,442 |
59.3 |
1164 |
41.06 |
4.81 |
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APC |
9x7.5-E |
14.8 |
25.09 |
371.3 |
9,794 |
69.6 |
1257 |
44.34 |
3.39 |
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APC |
9x9-E |
14.8 |
28.43 |
420.8 |
9,510 |
81.1 |
1249 |
44.06 |
2.97 |
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APC |
10x5-E |
14.8 |
20.29 |
300.2 |
10,171 |
48.2 |
1497 |
52.80 |
4.99 |
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APC |
10x6-E |
14.8 |
21.85 |
323.3 |
10,048 |
57.1 |
1594 |
56.23 |
4.93 |
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APC |
10x7-E |
14.8 |
25.37 |
375.4 |
9,767 |
64.7 |
1706 |
60.18 |
4.54 |
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APC |
10x10-E |
14.8 |
35.47 |
525.0 |
8,939 |
84.6 |
1476 |
52.06 |
2.81 |
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APC |
11x5.5-E |
14.8 |
27.57 |
408.0 |
9,583 |
49.9 |
1984 |
69.98 |
4.86 |
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APC |
11x7-E |
14.8 |
32.00 |
473.7 |
9,207 |
61.0 |
2061 |
72.70 |
4.35 |
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APC |
11x8-E |
14.8 |
34.53 |
511.0 |
9,010 |
68.3 |
1980 |
69.84 |
3.87 |
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APC |
11x8.5-E |
14.8 |
36.74 |
543.8 |
8,829 |
71.1 |
1974 |
69.63 |
3.63 |
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APC |
11x10-E |
14.8 |
41.20 |
609.7 |
8,361 |
79.2 |
1728 |
60.95 |
2.83 |
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APC |
12x6-E |
14.8 |
35.11 |
519.6 |
8,960 |
50.9 |
2407 |
84.90 |
4.63 |
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APC |
12x8-E |
14.8 |
41.58 |
615.4 |
8,405 |
63.7 |
2060 |
72.66 |
3.35 |
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APC |
13x4-E |
14.8 |
27.58 |
408.2 |
9,582 |
36.3 |
2269 |
80.04 |
5.56 |
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Prop |
Prop |
Input |
Motor |
Watts |
Prop |
Pitch |
Thrust |
Thrust |
Thrust Eff. |
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Manf. |
Size |
Voltage |
Amps |
Input |
RPM |
Speed |
Grams |
Ounces |
Grams/W |
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APC |
8x4-E |
18.5 |
14.62 |
270.5 |
13,441 |
50.9 |
1206 |
42.54 |
4.46 |
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APC |
8x6-E |
18.5 |
23.35 |
432.0 |
12,600 |
71.6 |
1413 |
49.84 |
3.27 |
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APC |
8x8-E |
18.5 |
30.03 |
555.5 |
12,082 |
91.5 |
1305 |
46.03 |
2.35 |
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APC |
9x4.5-E |
18.5 |
21.30 |
394.0 |
12,845 |
54.7 |
1755 |
61.91 |
4.45 |
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APC |
9x6-E |
18.5 |
24.57 |
454.6 |
12,545 |
71.3 |
1701 |
60.00 |
3.74 |
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APC |
9x7.5-E |
18.5 |
36.74 |
679.7 |
11,472 |
81.5 |
1752 |
61.80 |
2.58 |
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APC |
10x5-E |
18.5 |
30.16 |
557.9 |
12,055 |
57.1 |
2098 |
74.00 |
3.76 |
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APC |
10x6-E |
18.5 |
31.90 |
590.1 |
11,910 |
67.7 |
2255 |
79.54 |
3.82 |
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APC |
10x7-E |
18.5 |
36.43 |
674.0 |
11,497 |
76.2 |
2373 |
83.70 |
3.52 |
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Prop |
Prop |
Input |
Motor |
Watts |
Prop |
Pitch |
Thrust |
Thrust |
Thrust Eff. |
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Manf. |
Size |
Voltage |
Amps |
Input |
RPM |
Speed |
Grams |
Ounces |
Grams/W |
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APC |
7x5-E |
22.2 |
17.38 |
385.9 |
16,079 |
76.1 |
1218 |
42.96 |
3.16 |
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APC |
7x6-E |
22.2 |
18.09 |
401.5 |
15,948 |
90.6 |
1311 |
46.24 |
3.27 |
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APC |
8x4-E |
22.2 |
21.05 |
467.3 |
15,707 |
59.5 |
1666 |
58.77 |
3.57 |
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APC |
8x6-E |
22.2 |
33.91 |
752.8 |
14,471 |
82.2 |
1870 |
65.96 |
2.48 |
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APC |
8x8-E |
22.2 |
41.75 |
926.7 |
13,706 |
103.8 |
1686 |
59.47 |
1.82 |
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APC |
9x4.5-E |
22.2 |
29.79 |
661.3 |
14,855 |
63.3 |
2437 |
85.96 |
3.69 |
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APC |
9x6-E |
22.2 |
34.42 |
764.1 |
14,417 |
81.9 |
2255 |
79.54 |
2.95 |
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APC |
10x5-E |
22.2 |
41.23 |
915.3 |
13,642 |
64.6 |
2710 |
95.59 |
2.96 |
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Propeller Chart Color Code Explanation |
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The prop is to small to get good performance
from the motor. (Less than 50% power) |
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The prop is sized right to get good power
from the motor. (50 to 80% power) |
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The prop can be used, but full throttle
should be kept to short bursts. (80 to 100% power) |
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The prop is too big for the motor and should
not be used. (Over 100% power) |
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PLEASE
NOTE: |
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The
data contained in this prop chart is based on actual measurements taken in a
controlled test |
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environment. The test voltages used are based on a
properly sized Li-Po battery for the current |
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draw of the motor being
tested. If you are using a larger than
normal capacity battery, or a very |
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high C-Rated battery,
your actual voltages will be higher than those shown in this chart, and this |
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will result in higer
current draw for each prop used. You
should always test your power system |
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with a watt meter
whenever a prop is used to ensure that you are not exceeding the recommended |
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rating of the motor
being used. The prop recommendations
in this chart are based on the motor |
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receiving adequate
cooling throughout its operation. If
your motor is being used inside a cowl, you |
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must provide adequate
cooling to the motor and make sure that the motor is not getting too hot |
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during operation. |
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