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Cobra
C2820/8 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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8-Turn Delta |
1450 RPM/Volt |
Io = 2.50 Amps @ 10v |
Rm = 0.020 Ohms |
55 Amps |
610 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. |
139 gm, 4.90 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 |
7x5-E |
11.1 |
26.19 |
290.7 |
14,520 |
68.8 |
965 |
34.04 |
3.32 |
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APC |
7x6-E |
11.1 |
27.19 |
301.9 |
14,371 |
81.7 |
1047 |
36.93 |
3.47 |
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APC |
8x4-E |
11.1 |
30.79 |
341.8 |
14,096 |
53.4 |
1315 |
46.38 |
3.85 |
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APC |
8x6-E |
11.1 |
46.13 |
512.0 |
12,893 |
73.3 |
1477 |
52.10 |
2.88 |
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APC |
8x8-E |
11.1 |
57.37 |
636.8 |
12,203 |
92.4 |
1306 |
46.07 |
2.05 |
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APC |
9x4.5-E |
11.1 |
42.24 |
468.9 |
13,200 |
56.3 |
1846 |
65.12 |
3.94 |
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APC |
9x6-E |
11.1 |
48.20 |
535.0 |
12,847 |
73.0 |
1775 |
62.61 |
3.32 |
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APC |
10x5-E |
11.1 |
57.45 |
637.7 |
12,162 |
57.6 |
2119 |
74.74 |
3.32 |
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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 |
6x4-E |
14.8 |
19.62 |
290.3 |
20,353 |
77.1 |
913 |
32.20 |
3.14 |
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APC |
6x5.5-E |
14.8 |
24.39 |
361.0 |
19,825 |
103.3 |
944 |
33.30 |
2.62 |
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APC |
7x4-E |
14.8 |
35.30 |
522.4 |
18,999 |
72.0 |
1603 |
56.54 |
3.07 |
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APC |
7x5-E |
14.8 |
43.89 |
649.6 |
18,301 |
86.7 |
1607 |
56.68 |
2.47 |
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APC |
7x6-E |
14.8 |
45.22 |
669.2 |
18,208 |
103.5 |
1713 |
60.42 |
2.56 |
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APC |
8x4-E |
14.8 |
52.04 |
770.1 |
17,641 |
66.8 |
2098 |
74.00 |
2.72 |
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APC |
9x4.5-E |
14.8 |
69.03 |
1021.6 |
16,218 |
69.1 |
2942 |
103.77 |
2.88 |
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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 |
6x4-E |
18.5 |
30.50 |
564.2 |
24,675 |
93.5 |
1310 |
46.21 |
2.32 |
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APC |
6x5.5-E |
18.5 |
36.96 |
683.8 |
24,064 |
125.3 |
1370 |
48.32 |
2.00 |
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APC |
7x4-E |
18.5 |
55.42 |
1025.2 |
22,384 |
84.8 |
2258 |
79.65 |
2.20 |
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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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