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Cobra
CM-1806-26 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 |
26-Turn Delta |
2800 RPM/Volt |
Io = 0.653 Amps @ 10v |
Rm = 0.078 Ohms |
15 Amps |
220 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. |
21.0 gm, 0.74 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 |
0.505 A |
0.559 A |
0.653 A |
0.687 A |
2818 RPM/Volt @ 10v |
0.078 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 |
11.75 |
130.4 |
23,260 |
88.1 |
420.5 |
14.83 |
3.22 |
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HQ |
4x4x3-BN |
3 |
11.1 |
14.45 |
160.4 |
22,511 |
85.3 |
478.1 |
16.86 |
2.98 |
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HQ |
4x4.5 |
3 |
11.1 |
8.28 |
91.9 |
25,727 |
109.6 |
318.7 |
11.24 |
3.47 |
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HQ |
4x4.5-BN |
3 |
11.1 |
15.54 |
172.5 |
21,998 |
93.7 |
471.0 |
16.61 |
2.73 |
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HQ |
5x3 |
3 |
11.1 |
10.80 |
119.9 |
24,598 |
69.9 |
503.5 |
17.76 |
4.20 |
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HQ |
5x4 |
3 |
11.1 |
14.87 |
165.1 |
22,461 |
85.1 |
591.5 |
20.86 |
3.58 |
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HQ |
5x4.5 |
3 |
11.1 |
15.61 |
173.3 |
22,033 |
93.9 |
596.7 |
21.05 |
3.44 |
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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 |
3x3 |
4 |
14.8 |
8.05 |
119.1 |
35,238 |
100.1 |
321.6 |
11.34 |
2.70 |
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HQ |
4x4 |
4 |
14.8 |
18.11 |
268.0 |
29,440 |
111.5 |
624.5 |
22.03 |
2.33 |
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HQ |
4x4.5 |
4 |
14.8 |
12.97 |
192.0 |
32,319 |
137.7 |
493.9 |
17.42 |
2.57 |
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HQ |
5x3 |
4 |
14.8 |
15.61 |
231.0 |
29,665 |
84.3 |
738.4 |
26.05 |
3.20 |
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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 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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