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Cobra
CP2814-1800 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 |
8-Turn Delta |
1800 RPM/Volt |
Io = 3.01 Amps @ 10v |
Rm = 0.013 Ohms |
75 Amps |
1110 W |
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Stator |
Outside Diameter |
Body Length |
Total Shaft Length |
Shaft Diameter |
Motor
Weight |
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12-Slot |
35.1 mm, 1.38 in. |
36.0 mm, 1.42 in. |
41.5 mm, 1.63 in. |
5.00 mm, 0.197 in. |
120
gm, 4.23 oz |
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Test
Data From |
Input |
8.0 V |
10.0 V |
12.0V |
14.0V |
Measured
Kv value |
Measured
Rm Value |
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Sample
Motor |
Io Value |
2.491 A |
3.099 A |
3.311 A |
3.737 A |
1786
RPM/Volt @ 10V |
0.0133
Ohms |
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Prop |
Prop |
Li-Po |
Input |
Motor |
Watts |
Prop |
Pitch |
Thrust |
Thrust |
Thrust Eff. |
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Manf. |
Size |
Cells |
Voltage |
Amps |
Input |
RPM |
Speed |
Grams |
Ounces |
Grams/W |
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APC |
6x6-E |
3 |
11.1 |
27.07 |
300.4 |
17,952 |
102.0 |
796 |
28.08 |
2.65 |
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APC |
7x4-E |
3 |
11.1 |
33.89 |
376.2 |
17,497 |
66.3 |
1356 |
47.83 |
3.60 |
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APC |
7x5-E |
3 |
11.1 |
41.94 |
465.5 |
16,913 |
80.1 |
1336 |
47.13 |
2.87 |
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APC |
7x6-E |
3 |
11.1 |
44.40 |
492.9 |
16,800 |
95.5 |
1430 |
50.44 |
2.90 |
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APC |
8x4-E |
3 |
11.1 |
50.65 |
562.2 |
16,384 |
62.1 |
1752 |
61.80 |
3.12 |
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APC |
8x6-E |
3 |
11.1 |
76.54 |
849.6 |
14,755 |
83.8 |
1877 |
66.21 |
2.21 |
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HQ |
7x4.5 |
3 |
11.1 |
35.71 |
396.3 |
17,382 |
74.1 |
1377 |
48.57 |
3.47 |
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HQ |
8x5 |
3 |
11.1 |
49.05 |
544.4 |
16,502 |
78.1 |
1647.8 |
58.12 |
3.03 |
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Prop |
Prop |
Li-Po |
Input |
Motor |
Watts |
Prop |
Pitch |
Thrust |
Thrust |
Thrust Eff. |
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Manf. |
Size |
Cells |
Voltage |
Amps |
Input |
RPM |
Speed |
Grams |
Ounces |
Grams/W |
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APC |
5x4.6-MR |
4 |
14.8 |
28.93 |
428.2 |
24,355 |
106.1 |
1087 |
38.34 |
2.54 |
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APC |
6x4-E |
4 |
14.8 |
33.44 |
495.0 |
24,000 |
90.9 |
1232 |
43.46 |
2.49 |
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APC |
6x4.3-MR |
4 |
14.8 |
45.59 |
674.8 |
23,123 |
94.2 |
1748 |
61.66 |
2.59 |
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APC |
6x4.5-MR |
4 |
14.8 |
42.31 |
626.2 |
23,373 |
99.6 |
1739 |
61.34 |
2.78 |
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APC |
6x5.5-E |
4 |
14.8 |
40.43 |
598.3 |
23,479 |
122.3 |
1293 |
45.61 |
2.16 |
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APC |
6x6-E |
4 |
14.8 |
46.37 |
686.2 |
23,045 |
130.9 |
1305 |
46.03 |
1.90 |
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APC |
7x4-E |
4 |
14.8 |
59.71 |
883.7 |
21,842 |
82.7 |
2159 |
76.16 |
2.44 |
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APC |
7x5-E |
4 |
14.8 |
71.47 |
1057.8 |
20,983 |
99.4 |
2067 |
72.91 |
1.95 |
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APC |
7x6-E |
4 |
14.8 |
73.61 |
1089.4 |
20,848 |
118.5 |
2170 |
76.54 |
1.99 |
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HQ |
6x4.5 |
4 |
14.8 |
32.79 |
485.3 |
24,063 |
102.5 |
1506 |
53.12 |
3.10 |
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HQ |
6x4.5-BN |
4 |
14.8 |
46.91 |
694.3 |
23,046 |
98.2 |
1781 |
62.82 |
2.57 |
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HQ |
7x4.5 |
4 |
14.8 |
57.84 |
856.0 |
21,998 |
93.7 |
2191 |
77.28 |
2.56 |
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© 2017 Innov8tive Designs,
Inc. |
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This
chart, and the data contained within it, are the property of Innov8tive
Designs, Inc., and may not be reproduced without permission from the
author. |
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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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584 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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