Cobra C2204/58 Motor Propeller Data
Motor Wind Motor Kv No-Load Current Motor Resistance I Max P Max (3S)
58-Turn Delta 1080 RPM/Volt Io = 0.20 Amps @ 8v Rm = 0.318 Ohms 7 Amps 75 W
 
Outside Diameter Body Length Total Shaft Length Shaft Diameter Motor Weight
27.0 mm,  1.06 in. 14.2mm,  0.56 in. 21.8 mm,  0.86 in. 3.0 mm,  0.118 in. 22.5 gm,   0.79 oz
 
Prop Prop Input Motor Watts Prop Pitch Thrust  Thrust Thrust Eff.
Manf. Size Voltage Amps Input RPM Speed Grams Ounces Grams/W
APC 8x3.8-SF 7.4 3.38 25.0 5,924 21.3 233 8.22 9.33
APC 8x6-SF 7.4 4.88 36.1 5,097 29.0 250 8.82 6.92
APC 9x3.8-SF 7.4 4.29 31.7 5,412 19.5 281 9.91 8.86
APC 9x4.7-SF 7.4 4.71 34.8 5,194 23.1 294 10.37 8.44
APC 9x6-SF 7.4 6.02 44.6 4,421 25.1 295 10.41 6.62
APC 9x7.5-SF 7.4 6.62 49.0 4,010 28.5 260 9.17 5.31
APC 10x3.8-SF 7.4 5.64 41.8 4,566 16.4 325 11.46 7.78
APC 10x4.7-SF 7.4 6.02 44.6 4,356 19.4 333 11.75 7.47
GWS 8x4-DD 7.4 2.65 19.6 6,314 23.9 202 7.13 10.31
GWS 8x4x3-DD 7.4 3.15 23.3 6,036 22.9 220 7.76 9.44
GWS 8x4.3-SF 7.4 3.56 26.3 5,812 23.7 228 8.04 8.66
GWS 9x4.7-SF 7.4 4.94 36.5 5,015 22.3 298 10.51 8.15
GWS 9x5-DD 7.4 4.20 31.0 5,463 25.9 280 9.88 9.02
GWS 9x5x3-DD 7.4 4.90 36.3 5,033 23.8 292 10.30 8.05
GWS 10x4.7-SF 7.4 6.30 46.6 4,229 18.8 340 11.99 7.30
GWS 10x6-DD 7.4 5.25 38.8 4,871 27.7 323 11.39 8.32
GWS 10x6x3-DD 7.4 6.14 45.4 4,292 24.4 330 11.64 7.27
 
Prop Prop Input Motor Watts Prop Pitch Thrust  Thrust Thrust Eff.
Manf. Size Voltage Amps Input RPM Speed Grams Ounces Grams/W
APC 7x4-SF 11.1 4.23 47.0 8,929 33.8 324 11.43 6.90
APC 7x5-SF 11.1 4.85 53.8 8,531 40.4 326 11.50 6.06
APC 7x6-SF 11.1 5.75 63.9 7,951 45.2 315 11.11 4.93
APC 8x3.8-SF 11.1 6.08 67.4 7,735 27.8 427 15.06 6.33
GWS 7x3.5x3-DD 11.1 3.33 36.9 9,528 31.6 269 9.49 7.28
GWS 8x4-DD 11.1 4.71 52.3 8,638 32.7 383 13.51 7.32
GWS 8x4x3-DD 11.1 5.49 60.9 8,138 30.8 404 14.25 6.63
GWS 8x4.3-SF 11.1 6.01 66.7 7,804 31.8 416 14.67 6.24
GWS 9x5-DD 11.1 6.97 77.3 7,141 33.8 493 17.39 6.38
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.  The test voltages used are based on a properly sized Li-Po battery for the current
draw of the motor being tested.  If you are using a larger than normal capacity battery, or a very high
C-Rated battery, your actual voltages will be higher than those shown in this chart, and this will 
result in higer current draw for each prop used.  You should always test your power system with a 
watt meter whenever a prop is used to ensure that you are not exceeding the recommended rating
of the motor being used.  The prop recommendations in this chart are based on the motor receiving
adequate cooling throughout its operation.  If your motor is being used inside a cowl, you must 
provide adequate cooling to the motor and make sure that the motor is not getting too hot during
operation.