Cobra CM-2206/17  2400Kv  Motor Propeller Data
Magnets Motor Wind Motor Kv No-Load Current Motor Resistance I Max P Max (4S)
14-Pole 17-Turn Delta 2400 RPM/Volt Io = 1.20 Amps @ 10v Rm = 0.047 Ohms 25 Amps 370 W
 
Stator Outside Diameter Body Length Total Shaft Length Shaft Diameter Motor Weight
12-Slot 27.0 mm,  1.063 in. 16.5 mm,  1.102 in. 35.3 mm,  1.390 in. 3.00 mm,  0.118 in. 35.6 gm,   1.26 oz
 
Test Data From Input 6.0 V 8.0 V 10.0V 12.0V Measured Kv value Measured Rm Value
Sample Motor Io Value 0.970 A 1.060 A 1.158 A 1.288 A 2448 RPM/Volt @ 10v 0.0477 Ohms
 
Prop Prop Li-Po Input Motor Input Prop Pitch Speed Thrust  Thrust Thrust Eff.
Manf. Size Cells Voltage Amps Watts RPM in MPH Grams Ounces Grams/W
HQ 4x4 3 11.1 10.71 118.9 23,879 90.5 410.8 14.49 3.45
HQ 4x4x3 3 11.1 13.28 147.4 23,133 87.6 496.3 17.51 3.37
HQ 4x4.5 3 11.1 7.44 82.6 24,831 105.8 285.2 10.06 3.45
HQ 4x4.5-BN 3 11.1 14.48 160.8 22,769 97.0 499.1 17.61 3.10
HQ 5x3 3 11.1 9.39 104.2 24,142 68.6 465.1 16.41 4.46
HQ 5x4 3 11.1 13.68 151.9 23,043 87.3 605.1 21.34 3.98
HQ 5x4x3 3 11.1 18.55 205.9 21,694 82.2 748.5 26.40 3.63
HQ 5x4.5 3 11.1 14.91 165.4 22,690 96.7 618.2 21.81 3.74
HQ 5x4.5-BN 3 11.1 22.45 249.2 20,661 88.0 786.3 27.74 3.16
HQ 6x3 3 11.1 14.37 159.5 22,876 65.0 692.5 24.43 4.34
HQ 6x4.5 3 11.1 26.53 294.5 19,576 83.4 1021.7 36.04 3.47
 
Prop Prop Li-Po Input Motor Input Prop Pitch Speed Thrust  Thrust Thrust Eff.
Manf. Size Cells Voltage Amps Watts RPM in MPH Grams Ounces Grams/W
HQ 4x4 4 14.8 15.29 226.3 30,758 116.5 650.9 22.96 2.88
HQ 4x4x3 4 14.8 19.18 283.9 29,469 111.6 776.5 27.39 2.73
HQ 4x4.5 4 14.8 11.62 172.0 31,938 136.1 475.0 16.75 2.76
HQ 4x4.5-BN 4 14.8 21.43 317.1 28,782 122.7 780.6 27.53 2.46
HQ 5x3 4 14.8 14.99 221.9 30,998 88.1 757.0 26.70 3.41
HQ 5x4 4 14.8 20.80 307.8 29,016 109.9 969.4 34.19 3.15
HQ 5x4x3 4 14.8 27.23 403.0 27,052 102.5 1146.8 40.45 2.85
HQ 5x4.5 4 14.8 23.17 342.9 28,320 120.7 978.2 34.50 2.85
HQ 6x3 4 14.8 22.46 332.5 28,513 81.0 1118.0 39.44 3.36
 
Prop Prop Li-Po Input Motor Input Prop Pitch Speed Thrust  Thrust Thrust Eff.
Manf. Size Cells Voltage Amps Watts RPM in MPH Grams Ounces Grams/W
HQ 4x4 5 18.5 19.77 365.7 36,928 139.9 911.9 32.17 2.49
HQ 4x4x3 5 18.5 24.45 452.4 35,178 133.3 1062.2 37.47 2.35
HQ 4x4.5 5 18.5 16.15 298.8 38,220 162.9 680.9 24.02 2.28
HQ 5x3 5 18.5 19.86 367.5 36,958 105.0 1081.9 38.16 2.94
HQ 5x4 5 18.5 26.93 498.2 33,143 125.5 1287.7 45.42 2.58
 
Prop Prop Li-Po Input Motor Input Prop Pitch Speed Thrust  Thrust Thrust Eff.
Manf. Size Cells Voltage Amps Watts RPM in MPH Grams Ounces Grams/W
HQ 4x4 6 22.2 23.20 515.1 41,625 157.7 1132.4 39.94 2.20
HQ 4x4.5 6 22.2 21.40 475.1 43,860 186.9 906.9 31.99 1.91
HQ 5x3 6 22.2 24.67 547.7 41,147 116.9 1358.6 47.92 2.48
Propeller Chart Color Code Explanation
   The prop is to small to get good performance from the motor. (Less than 50% power)
   The prop is sized right to get good power from the motor. (50 to 80% power)
   The prop can be used, but full throttle should be kept to short bursts. (80 to 100% power)
   The prop is too big for the motor and should not be used. (Over 100% power)
PLEASE NOTE:
The Data contained in this Prop Chart is based on actual measurements, taken in a controlled test environment, at an altitude of
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
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
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
always test your actual power system with a watt meter before flying your model to make sure that you are not exceeding the 
recommended current and power ratings of the motor being used.  The prop recommendations in this chart assume that the motor
receives adequate cooling throughout its operation.  If your motor is being used inside a cowl or fuselage, you must ensure that
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
more than 80% of the motors maximum recommended current value to ensure safe operation under all conditions.