Cobra CM-2206/30 Motor Propeller Data
Magnets Motor Wind Motor Kv No-Load Current Motor Resistance I Max P Max (4S)
14-Pole 30-Turn Delta 1400 RPM/Volt Io = 0.52 Amps @ 12v Rm = 0.123 Ohms 17 Amps 250 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. 36.5 gm,   1.29 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 0.48 A 0.52 A 0.56 A 0.60 A 1397 RPM/Volt @ 12v 0.123 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 6x4-E 3 11.1 6.29 69.8 13,046 49.4 353 12.45 5.06
APC 7x4-SF 3 11.1 9.95 110.4 11,922 45.2 567 20.00 5.13
APC 7x5-E 3 11.1 12.17 135.1 11,222 53.1 572 20.18 4.23
APC 8x4.5-MR 3 11.1 15.01 166.6 10,164 43.3 759 26.77 4.56
FC 6x4.5 3 11.1 6.74 74.8 12,927 55.1 429 15.13 5.73
FC 7x4.5x3 3 11.1 14.40 159.8 10,364 44.2 715 25.22 4.47
GemFan 8x4.5-MR 3 11.1 17.47 193.9 9,135 38.9 794 28.01 4.09
HQ 6x4.5 3 11.1 6.79 75.4 12,934 55.1 430 15.17 5.71
HQ 6x4.5x3 3 11.1 8.77 97.3 12,334 52.6 508 17.92 5.22
HQ 7x4 3 11.1 9.89 109.8 11,946 45.3 581 20.49 5.29
HQ 7x4.5  3 11.1 10.48 116.3 11,829 50.4 599 21.13 5.15
 
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 6x4-E 4 14.8 9.86 145.9 16,331 61.9 558 19.68 3.82
APC 7x4-SF 4 14.8 15.47 229.0 14,275 54.1 853 30.09 3.73
APC 7x5-E 4 14.8 17.91 265.1 13,281 62.9 811 28.61 3.06
FC 5x4.5 4 14.8 5.19 76.8 17,685 75.4 371 13.09 4.83
FC 5x4.5x3 4 14.8 7.85 116.2 16,939 72.2 479 16.90 4.12
FC 6x4.5 4 14.8 10.13 149.9 16,218 69.1 672 23.70 4.48
HQ 5x4 4 14.8 5.11 75.6 17,675 67.0 377 13.30 4.98
HQ 5x4.5-BN 4 14.8 8.28 122.5 16,940 72.2 500 17.64 4.08
HQ 6x3 4 14.8 5.08 75.2 17,850 50.7 420 14.81 5.59
HQ 6x4.5 4 14.8 10.27 152.0 16,251 69.3 685 24.16 4.51
HQ 6x4.5x3 4 14.8 12.91 191.1 15,247 65.0 781 27.55 4.09
HQ 7x4 4 14.8 15.42 228.2 14,328 54.3 887 31.29 3.89
HQ 7x4.5 4 14.8 15.06 222.9 14,410 61.4 884 31.18 3.97
 
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 5.25x4.75-E 6 22.2 17.75 394.1 23,125 104.0 763 26.91 1.94
APC 5.5x4.5 6 22.2 18.21 404.3 22,884 97.5 808 28.50 2.00
FC 5x4.5 6 22.2 9.24 205.1 23,904 101.9 692 24.41 3.37
FC 5x4.5x3 6 22.2 13.51 299.9 22,769 97.0 863 30.44 2.88
FC 6x4.5 6 22.2 17.16 381.0 21,145 90.1 1143 40.32 3.00
HQ 5x3 6 22.2 4.67 103.7 26,091 74.1 442 15.59 4.26
HQ 5x4 6 22.2 8.11 180.0 23,306 88.3 670 23.63 3.72
HQ 5x4.5-BN 6 22.2 13.76 305.5 22,912 97.6 893 31.50 2.92
HQ 6x3 6 22.2 9.25 205.4 23,766 67.5 820 28.92 3.99
HQ 6x4.5 6 22.2 16.50 366.3 21,485 91.6 1154 40.71 3.15
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.