Cobra C2814/10 Motor Propeller Data
Motor Wind Motor Kv No-Load Current Motor Resistance I Max P Max (3S)
10-Turn Delta 1700 RPM/Volt Io = 2.06 Amps @ 10v Rm = 0.024 Ohms 48 Amps 530 W 
 
Outside Diameter Body Length Total Shaft Length Shaft Diameter Motor Weight
35.0 mm,  1.38 in. 34.1 mm,  1.34 in. 54.0 mm,  2.13 in. 5.00 mm,  0.197 in. 109 gm,   3.84 oz
 
Prop Prop Input Motor Watts Prop Pitch Thrust  Thrust Thrust Eff.
Manf. Size Voltage Amps Input RPM Speed Grams Ounces Grams/W
APC 6x4-E 11.1 13.79 153.1 16,583 62.8 608 21.45 3.97
APC 6x5.5-E 11.1 17.24 191.4 16,243 84.6 642 22.65 3.35
APC 7x4-E 11.1 23.22 257.7 15,652 59.3 1045 36.86 4.05
APC 7x5-E 11.1 29.55 328.0 15,038 71.2 1068 37.67 3.26
APC 7x6-E 11.1 30.61 339.7 14,918 84.8 1138 40.14 3.35
APC 8x4-E 11.1 34.41 381.9 14,567 55.2 1431 50.48 3.75
APC 8x6-E 11.1 50.17 556.8 13,026 74.0 1507 53.16 2.71
APC 9x4.5-E 11.1 46.23 513.2 13,410 57.1 1917 67.62 3.74
 
Prop Prop Input Motor Watts Prop Pitch Thrust  Thrust Thrust Eff.
Manf. Size Voltage Amps Input RPM Speed Grams Ounces Grams/W
APC 6x4-E 14.8 23.49 347.7 21,348 80.9 1017 35.87 2.93
APC 6x5.5-E 14.8 28.89 427.6 20,711 107.9 1043 36.79 2.44
APC 7x4-E 14.8 40.23 595.4 19,494 73.8 1707 60.21 2.87
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.