Cobra CP-2207/2300 Motor Propeller Data
Magnets Motor Wind Motor Kv No-Load Current Motor Resistance I Max P Max (4S)
14-Pole 18-Turn Delta 2300 RPM/Volt Io = 1.74 Amps @ 14v Rm = 0.034 Ohms 30 Amps 450 W
 
Stator Outside Diameter Body Length Total Shaft Length Shaft Diameter Motor Weight
12-Slot 27.8 mm,  1.094 in. 21.0 mm,  0.827 in. 36.4 mm,  1.433 in. 3.00 mm,  0.118 in. 35.8 gm,   1.26 oz
 
Test Data From Input 10.0 V 12.0 V 14.0V 16.0V Measured Kv value Measured Rm Value
Sample Motor Io Value 1.413 A 1.617 A 1.736 A 1.872 A 2342 RPM/Volt @ 14v 0.034 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
APC 4x3.3-MR 3 11.1 10.79 119.8 24,055 75.2 393 13.86 3.28
APC 4x4x3-MR 3 11.1 15.78 175.2 23,102 87.5 540 19.05 3.08
APC 4x4.5-MR 3 11.1 14.74 163.6 23,363 99.6 434 15.31 2.65
APC 5x4x3-MR 3 11.1 28.93 321.1 20,698 78.4 947 33.40 2.95
APC 5x4.3-MR 3 11.1 25.40 281.9 21,424 87.2 812 28.64 2.88
APC 5x4.5-MR 3 11.1 26.64 295.7 21,198 90.3 804 28.36 2.72
APC 5x4.6-MR 3 11.1 26.54 294.6 21,219 92.4 849 29.95 2.88
HQ 4x4 3 11.1 11.34 125.9 23,906 90.6 414 14.60 3.29
HQ 4x4x3 3 11.1 14.54 161.3 23,400 88.6 518 18.27 3.21
HQ 4x4.5 3 11.1 7.58 84.1 24,662 105.1 281 9.91 3.34
HQ 4x4.5-BN 3 11.1 15.56 172.7 23,209 98.9 519 18.31 3.01
HQ 5x3 3 11.1 9.82 108.9 24,233 68.8 473 16.68 4.34
HQ 5x4 3 11.1 14.59 162.0 23,378 88.6 632 22.29 3.90
HQ 5x4x3 3 11.1 20.23 224.6 22,340 84.6 793 27.97 3.53
HQ 5x4x4 3 11.1 24.12 267.7 21,606 81.8 905 31.92 3.38
HQ 5x4.5 3 11.1 15.90 176.5 23,131 98.6 645 22.75 3.65
HQ 5x4.5-BN 3 11.1 25.20 279.7 21,413 91.2 854 30.12 3.05
HQ 5x4.5x3 3 11.1 31.71 352.0 20,112 85.7 995 35.10 2.83
HQ 5x4.6-BN 3 11.1 21.30 236.4 22,164 96.5 820 28.92 3.47
HQ 5.5x4.5-BN 3 11.1 27.89 309.5 20,876 89.0 1004 35.41 3.24
HQ 6x3 3 11.1 15.20 168.8 23,273 66.1 713.2 25.16 4.23
HQ 6x4.5 3 11.1 30.01 333.2 20,468 87.2 1030 36.33 3.09
 
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
APC 4x3.3-MR 4 14.8 17.92 265.3 30,981 96.8 670 23.63 2.53
APC 4x4x3-MR 4 14.8 25.04 370.6 29,549 111.9 887 31.29 2.39
APC 4x4.5-MR 4 14.8 24.44 361.7 29,670 126.4 725 25.57 2.00
HQ 4x4 4 14.8 16.61 245.8 31,234 118.3 679 23.95 2.76
HQ 4x4x3 4 14.8 21.01 310.9 30,189 114.4 820 28.92 2.64
HQ 4x4.5 4 14.8 12.28 181.8 32,121 136.9 479 16.90 2.63
HQ 4x4.5-BN 4 14.8 23.97 354.8 29,760 126.8 850 29.98 2.40
HQ 5x3 4 14.8 15.47 229.0 31,423 89.3 792 27.94 3.46
HQ 5x4 4 14.8 23.40 346.3 29,857 113.1 1056 37.25 3.05
HQ 5x4x3 4 14.8 31.27 462.8 28,192 106.8 1276 45.01 2.76
HQ 5x4.5  4 14.8 25.86 382.7 29,235 124.6 1054 37.18 2.75
HQ 5x4.6-BN 4 14.8 30.84 456.4 28,209 122.9 1262 44.51 2.77
HQ 6x3 4 14.8 25.05 370.8 29,500 83.8 1211 42.72 3.27
 
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 22.04 407.7 37,833 143.3 978 34.50 2.40
HQ 4x4x3 5 18.5 26.02 481.3 35,463 134.3 1105 38.98 2.30
HQ 4x4.5 5 18.5 17.39 321.8 38,843 165.5 704 24.83 2.19
HQ 5x3 5 18.5 22.17 410.2 37,806 107.4 1170 41.27 2.85
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.