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Cobra
CM-1806-30 Motor Propeller Data |
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Magnets |
Motor Wind |
Motor Kv |
No-Load Current |
Motor Resistance |
I Max |
P Max (4S) |
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14-Pole |
30-Turn Delta |
2450 RPM/Volt |
Io = 0.475 Amps @ 10v |
Rm = 0.098 Ohms |
12 Amps |
175 W |
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Stator |
Outside Diameter |
Body Length |
Total Shaft Length |
Shaft Diameter |
Motor Weight |
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12-Slot |
23.0 mm, 0.906 in. |
15.1 mm, 0.594 in. |
33.1 mm, 1.303 in. |
2.00 mm, 0.079 in. |
21.2 gm, 0.75 oz |
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Test
Data From |
Input |
6.0 V |
8.0 V |
10.0V |
12.0V |
Measured Kv value |
Measured Rm Value |
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Sample
Motor |
Io Value |
0.378 A |
0.430 A |
0.475 A |
0.526 A |
2461 RPM/Volt @ 10v |
0.098 Ohms |
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Prop |
Prop |
Li-Po |
Input |
Motor |
Input |
Prop |
Pitch Speed |
Thrust |
Thrust |
Thrust Eff. |
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Manf. |
Size |
Cells |
Voltage |
Amps |
Watts |
RPM |
in MPH |
Grams |
Ounces |
Grams/W |
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HQ |
4x4-BN |
3 |
11.1 |
9.06 |
100.5 |
21,571 |
81.7 |
353.1 |
12.46 |
3.51 |
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HQ |
4x4x3-BN |
3 |
11.1 |
11.06 |
122.7 |
19,685 |
74.6 |
414.4 |
14.62 |
3.38 |
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HQ |
4x4.5 |
3 |
11.1 |
5.97 |
66.2 |
23,345 |
99.5 |
260.8 |
9.20 |
3.94 |
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HQ |
4x4.5-BN |
3 |
11.1 |
11.53 |
128.0 |
18,010 |
76.7 |
398.4 |
14.05 |
3.11 |
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HQ |
5x3 |
3 |
11.1 |
7.89 |
87.5 |
22,269 |
63.3 |
415.3 |
14.65 |
4.74 |
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HQ |
5x4 |
3 |
11.1 |
10.98 |
121.8 |
19,870 |
75.3 |
500.1 |
17.64 |
4.10 |
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HQ |
5x4x3 |
3 |
11.1 |
14.29 |
158.6 |
18,349 |
69.5 |
553.6 |
19.53 |
3.49 |
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HQ |
5x4.5 |
3 |
11.1 |
11.54 |
128.0 |
19,130 |
81.5 |
496.3 |
17.51 |
3.88 |
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HQ |
6x3 |
3 |
11.1 |
11.06 |
122.8 |
19,478 |
55.3 |
552.1 |
19.47 |
4.50 |
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Prop |
Prop |
Li-Po |
Input |
Motor |
Input |
Prop |
Pitch Speed |
Thrust |
Thrust |
Thrust Eff. |
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Manf. |
Size |
Cells |
Voltage |
Amps |
Watts |
RPM |
in MPH |
Grams |
Ounces |
Grams/W |
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HQ |
4x4-BN |
4 |
14.8 |
12.91 |
191.1 |
26,019 |
98.6 |
535.5 |
18.89 |
2.80 |
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HQ |
4x4.5 |
4 |
14.8 |
9.96 |
147.4 |
29,856 |
127.2 |
414.4 |
14.62 |
2.81 |
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HQ |
5x3 |
4 |
14.8 |
11.99 |
177.5 |
26,859 |
76.3 |
647.8 |
22.85 |
3.65 |
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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 environment, at an
altitude of |
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512 feet above sea level. The test voltages used are based on the
standard output of a Li-Po battery under load, which is 3.70 volts |
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per cell.
If you are using a battery that is larger in capacity than normal, or
has a very high C-rating, then your actual voltages will |
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be higher than those shown in the chart, and
this will result in a higher current and power value for every prop
used. You should |
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always test your actual power system with a
watt meter before flying your model to make sure that you are not exceeding
the |
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recommended current and power ratings of the
motor being used. The prop
recommendations in this chart assume that the motor |
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receives adequate cooling throughout its
operation. If your motor is being used
inside a cowl or fuselage, you must ensure that |
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the motor receives sufficient airflow, and
does not get too hot during operation.
It is always best to use a prop size that pulls no |
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more than 80% of the motors maximum
recommended current value to ensure safe operation under all conditions. |
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