Cobra CP2814-2350 Motor Propeller Data
Magnets Motor Wind Motor Kv No-Load Current Motor Resistance I Max P Max (4S)
14-Pole 6-Turn Delta 2350 RPM/Volt Io = 4.63 Amps @ 10v Rm = 0.010 Ohms 90 Amps 1330 W
 
Stator Outside Diameter Body Length Total Shaft Length Shaft Diameter Motor Weight
12-Slot 35.1 mm, 1.38 in. 36.0 mm, 1.42 in. 41.5 mm, 1.63 in. 5.00 mm, 0.197 in. 120 gm, 4.23 oz
 
Test Data From Input 8.0 V 10.0 V 12.0V 14.0V Measured Kv value Measured Rm Value
Sample Motor Io Value 3.873 A 4.628 A 5.072 A 5.727 A 2398 RPM/Volt @ 10V 0.0097 Ohms
Prop Prop Li-Po Input Motor Watts Prop Pitch Thrust Thrust Thrust Eff.
Manf. Size Cells Voltage Amps Input RPM Speed Grams Ounces Grams/W
APC 5x4.3-MR 3 11.1 36.41 404.1 24,130 98.3 1009 35.59 2.50
APC 5x4.5-MR 3 11.1 36.39 404.0 23,744 101.2 975 34.39 2.41
APC 5x4.6-MR 3 11.1 37.94 421.1 24,023 104.6 1068 37.67 2.54
APC 6x4-E 3 11.1 43.02 477.5 23,613 89.4 1186 41.83 2.48
APC 6x4.3-MR 3 11.1 55.27 613.5 22,350 91.0 1623 57.25 2.65
APC 6x4.5-MR 3 11.1 52.51 582.8 22,683 96.7 1633 57.60 2.80
APC 6x5.5-E 3 11.1 51.89 576.0 23,112 120.4 1253 44.20 2.18
APC 6x6-E 3 11.1 59.10 656.0 22,485 127.8 1253 44.20 1.91
APC 7x4-E 3 11.1 72.96 809.9 21,080 79.8 2002 70.62 2.47
APC 7x5-E 3 11.1 89.14 989.5 20,305 96.1 1928 68.01 1.95
HQ 6x4.5 3 11.1 42.17 468.1 23,756 101.2 1446 51.01 3.09
HQ 6x4.5-BN 3 11.1 59.34 658.7 22,534 96.0 1703 60.07 2.59
HQ 7x4.5 3 11.1 70.15 778.7 21,335 90.9 2077 73.26 2.67
 
Prop Prop Li-Po Input Motor Watts Prop Pitch Thrust Thrust Thrust Eff.
Manf. Size Cells Voltage Amps Input RPM Speed Grams Ounces Grams/W
APC 5x4.3-MR 4 14.8 61.23 906.2 30,464 124.0 1609 56.76 1.78
APC 5x4.5-MR 4 14.8 65.50 969.4 30,004 127.9 1585 55.91 1.64
APC 5x4.6-MR 4 14.8 64.57 955.6 30,254 131.8 1723 60.78 1.80
APC 6x4-E 4 14.8 72.99 1080.3 29,782 112.8 1841 64.94 1.70
APC 6x4.3-MR 4 14.8 95.52 1413.7 28,181 114.8 2592 91.43 1.83
APC 6x4.5-MR 4 14.8 86.65 1282.4 28,709 122.3 2648 93.40 2.06
APC 6x5.5-E 4 14.8 86.05 1273.5 28,781 149.9 1886 66.53 1.48
APC 6x6-E 4 14.8 95.75 1417.0 28,071 159.5 1897 66.91 1.34
HQ 5x4.5 4 14.8 36.01 532.9 32,500 138.5 1238 43.67 2.32
HQ 5x4.5-BN 4 14.8 54.67 809.0 30,936 131.8 1740 61.38 2.15
HQ 6x4.5 4 14.8 68.70 1016.8 30,078 128.2 2316 81.69 2.28
HQ 6x4.5-BN 4 14.8 93.56 1384.7 28,295 120.6 2648 93.40 1.91
2017 Innov8tive Designs, Inc.
This chart, and the data contained within it, are the property of Innov8tive Designs, Inc., and may not be reproduced without permission from the author.
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.