Cobra CP-2210/2200 Motor Propeller Data
Magnets Motor Wind Motor Kv No-Load Current Motor Resistance I Max P Max (4S)
14-Pole 14-Turn Delta 2200 RPM/Volt Io = 1.70 Amps @ 10v Rm = 0.032 Ohms 38 Amps 560 W
 
Stator Outside Diameter Body Length Total Shaft Length Shaft Diameter Motor Weight
12-Slot 27.8 mm,  1.094 in. 24.5 mm,  0.965 in. 29.1 mm,  1.146 in. 3.17 mm,  0.125 in. 48.2 gm,   1.70 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 1.313 A 1.509 A 1.703 A 1.984 A 2176 RPM/Volt @ 10v 0.0321 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 4x4x3-MR 3 11.1 13.79 153.1 22,194 84.1 470 16.58 3.07
APC 5x4x3-MR 3 11.1 25.98 288.4 20,473 77.5 878 30.97 3.04
APC 5x4.3-MR 3 11.1 22.28 247.3 20,970 85.4 737 26.00 2.98
APC 5x4.5-MR 3 11.1 23.38 259.5 20,830 88.8 732 25.82 2.82
APC 5x4.6-MR 3 11.1 23.45 260.2 20,818 90.7 781 27.55 3.00
APC 5x5-E 3 11.1 20.02 222.2 21,291 100.8 445 15.70 2.00
APC 5.25x4.75-E 3 11.1 22.64 251.3 20,927 94.1 610 21.52 2.43
APC 5.5x4.5-E 3 11.1 23.55 261.4 20,758 88.5 646 22.79 2.47
APC 6x4-E 3 11.1 26.70 296.4 20,311 76.9 858 30.26 2.89
APC 6x4.3-MR 3 11.1 35.03 388.8 19,144 78.0 1168 41.20 3.00
APC 6x4.5-MR 3 11.1 33.56 372.5 19,334 82.4 1173 41.38 3.15
APC 6x5.5-E 3 11.1 33.48 371.6 19,329 100.7 829 29.24 2.23
APC 6x6-E 3 11.1 35.90 398.5 19,008 108.0 916 32.31 2.30
HQ 5x4 3 11.1 12.83 142.4 22,434 85.0 558 19.68 3.92
HQ 5x4x3 3 11.1 17.76 197.1 21,651 82.0 714 25.19 3.62
HQ 5x4.5 3 11.1 13.93 154.6 22,190 94.6 575 20.28 3.72
HQ 5x4.5-BN 3 11.1 22.33 247.8 20,985 89.4 785 27.69 3.17
HQ 5x4.5x3-BN 3 11.1 28.65 318.0 20,121 85.7 939 33.12 2.95
HQ 5.5x4.5-BN 3 11.1 24.98 277.3 20,603 87.8 933 32.91 3.37
HQ 6x3 3 11.1 13.27 147.3 22,342 63.5 627 22.12 4.26
HQ 6x4.5 3 11.1 27.24 302.4 20,297 86.5 1066 37.60 3.53
HQ 6x4.5-BN 3 11.1 36.64 406.7 18,845 80.3 1197 42.22 2.94
HQ 6x4.5x3 3 11.1 35.19 390.6 19,101 81.4 1256 44.30 3.22
 
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 4x4x3-MR 4 14.8 22.26 329.5 28,735 108.8 797 28.11 2.42
APC 5x4x3-MR 4 14.8 41.45 613.4 25,781 97.7 1430 50.44 2.33
APC 5x4.3-MR 4 14.8 37.04 548.2 26,352 99.8 1192 42.05 2.17
APC 5x4.5-MR 4 14.8 39.74 588.1 25,944 98.3 1179 41.59 2.00
APC 5x5-E 4 14.8 33.15 490.5 26,931 127.5 718 25.33 1.46
APC 5.25x4.75-E 4 14.8 37.87 560.5 26,193 117.8 969 34.18 1.73
APC 5.5x4.5-E 4 14.8 38.87 575.3 26,006 110.8 1036 36.54 1.80
HQ 5x4 4 14.8 20.58 304.6 29,013 109.9 949 33.47 3.12
HQ 5x4x3 4 14.8 27.83 411.8 27,871 105.6 1178 41.55 2.86
HQ 5x4.5  4 14.8 22.88 338.7 28,661 122.1 962 33.93 2.84
HQ 5x4.5-BN 4 14.8 35.12 519.8 26,653 113.6 1278 45.08 2.46
HQ 5.5x4.5-BN 4 14.8 39.33 582.1 25,916 110.4 1496 52.77 2.57
HQ 6x3 4 14.8 22.16 327.9 28,758 81.7 1093 38.55 3.33
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
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
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.