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Cobra
C-2221-10 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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10 Turn
Delta |
1500 RPM/Volt |
Io = 1.37 Amps @ 10v |
Rm = 37 Ohms |
38 Amps |
420 W |
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Outside
Diameter |
Body Length |
Total Shaft Length |
Shaft Diameter |
Motor Weight |
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27.65 mm,
1.089 in. |
37.00 mm, 1.457 in. |
54.00 mm, 2.126 in. |
4.00 mm, 0.157 in. |
88 gm, 3.10 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 |
7x4-E |
11.1 |
16.39 |
181.9 |
14,134 |
53.5 |
845 |
29.81 |
4.64 |
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APC |
7x4-SF |
11.1 |
17.20 |
190.9 |
14,019 |
53.1 |
833.4 |
29.40 |
4.37 |
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APC |
7x5-E |
11.1 |
20.44 |
226.9 |
13,559 |
64.2 |
841.7 |
29.69 |
3.71 |
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APC |
7x5-SF |
11.1 |
21.11 |
234.3 |
13,472 |
63.8 |
877.8 |
30.96 |
3.75 |
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APC |
7x6-E |
11.1 |
21.73 |
241.2 |
13,399 |
76.1 |
927.8 |
32.73 |
3.85 |
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APC |
7x6-SF |
11.1 |
24.86 |
276.0 |
12,948 |
73.6 |
834.3 |
29.43 |
3.02 |
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APC |
8x3.8-SF |
11.1 |
27.76 |
308.1 |
12,565 |
45.2 |
1268.9 |
44.76 |
4.12 |
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APC |
8x4-E |
11.1 |
23.86 |
264.8 |
13,097 |
49.6 |
1139.9 |
40.21 |
4.30 |
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APC |
8x6-E |
11.1 |
34.16 |
379.1 |
11,654 |
66.2 |
1214.3 |
42.83 |
3.20 |
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APC |
8x6-SF |
11.1 |
41.31 |
458.5 |
10,624 |
60.4 |
1225.9 |
43.24 |
2.67 |
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APC |
8x8-E |
11.1 |
40.89 |
453.9 |
10,673 |
80.9 |
1023.3 |
36.10 |
2.25 |
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APC |
9x3.8-SF |
11.1 |
35.06 |
389.2 |
11,543 |
41.5 |
1559.4 |
55.01 |
4.01 |
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APC |
9x4.5-E |
11.1 |
31.82 |
353.2 |
11,972 |
51.0 |
1512.4 |
53.35 |
4.28 |
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APC |
9x4.7-SF |
11.1 |
31.68 |
351.6 |
12,011 |
53.5 |
1537.5 |
54.23 |
4.37 |
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APC |
9x6-E |
11.1 |
36.06 |
400.3 |
11,378 |
64.6 |
1412.1 |
49.81 |
3.53 |
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APC |
10x5-E |
11.1 |
40.09 |
445.0 |
10,785 |
51.1 |
1694.8 |
59.78 |
3.81 |
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GEM |
8x4.5 |
11.1 |
31.83 |
353.3 |
11,973 |
51.0 |
1395.5 |
49.22 |
3.95 |
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GEM |
9x4.7 |
11.1 |
34.38 |
381.7 |
11,607 |
51.7 |
1587.4 |
55.99 |
4.16 |
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GEM |
10x4.5 |
11.1 |
45.69 |
507.2 |
9,781 |
41.7 |
1831.8 |
64.61 |
3.61 |
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MAS |
7x4x3 |
11.1 |
17.99 |
199.7 |
13,921 |
52.7 |
835.4 |
29.47 |
4.18 |
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MAS |
8x6x3 |
11.1 |
31.92 |
354.3 |
11,978 |
68.1 |
1367.5 |
48.24 |
3.86 |
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MAS |
9x7x3 |
11.1 |
43.33 |
481.0 |
10,284 |
68.2 |
1659.7 |
58.54 |
3.45 |
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MAS |
10x5x3 |
11.1 |
40.33 |
447.7 |
10,657 |
50.5 |
1778 |
62.72 |
3.97 |
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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 |
16.51 |
244.3 |
19,345 |
73.3 |
830.7 |
29.30 |
3.40 |
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APC |
6x5.5-E |
14.8 |
21.46 |
317.6 |
18,546 |
96.6 |
776.1 |
27.38 |
2.44 |
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APC |
7x4-E |
14.8 |
27.88 |
412.6 |
17,516 |
66.3 |
1360.7 |
48.00 |
3.30 |
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APC |
7x5-E |
14.8 |
32.60 |
482.5 |
16,379 |
77.6 |
1303.1 |
45.97 |
2.70 |
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APC |
7x6-E |
14.8 |
33.84 |
500.8 |
16,226 |
92.2 |
1412.2 |
49.81 |
2.82 |
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APC |
8x4-E |
14.8 |
38.81 |
574.4 |
15,827 |
60.0 |
1693.7 |
59.74 |
2.95 |
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MAS |
7x4x3 |
14.8 |
27.80 |
411.4 |
17,536 |
66.4 |
1347.8 |
47.54 |
3.28 |
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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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