Cobra C3525/14 Motor Propeller Data
Motor Wind Motor Kv No-Load Current Motor Resistance I Max P Max (6S)
14-Turn Delta 560 RPM/Volt Io = 1.18 Amps @ 20v Rm = 0.037 Ohms 45 Amps 1000 W 
 
Outside Diameter Body Length Total Shaft Length Shaft Diameter Motor Weight
43.0 mm,  1.69 in. 51.0 mm,  2.01 in. 73.0 mm,  2.87 in. 5.00 mm,  0.197 in. 253 gm,   8.92 oz
 
Prop Prop Input Motor Watts Prop Pitch Thrust  Thrust Thrust Eff.
Manf. Size Voltage Amps Input RPM Speed Grams Ounces Grams/W
APC 12x10-E 14.8 22.99 340.3 6,777 64.2 1532 54.04 4.50
APC 12x12-E 14.8 27.10 401.0 6,554 74.5 1368 48.25 3.41
APC 13x6.5-E 14.8 21.49 318.0 6,900 42.5 1911 67.41 6.01
APC 13x8-E 14.8 23.42 346.6 6,804 51.5 1935 68.25 5.58
APC 13x10-E 14.8 30.90 457.4 6,423 60.8 1793 63.25 3.92
APC 14x7-E 14.8 26.24 388.3 6,647 44.1 2252 79.44 5.80
APC 14x8.5-E 14.8 27.99 414.2 6,565 52.8 2313 81.59 5.58
APC 14x10-E 14.8 28.24 418.0 6,556 62.1 2289 80.74 5.48
APC 14x12-E 14.8 40.25 595.8 5,944 67.5 1878 66.24 3.15
APC 15x4-E 14.8 21.32 315.5 6,920 26.2 2212 78.03 7.01
APC 15x6-E 14.8 27.89 412.8 6,567 37.3 2550 89.95 6.18
APC 15x8-E 14.8 29.62 438.4 6,481 49.1 2526 89.10 5.76
APC 15x10-E 14.8 39.85 589.8 5,958 56.4 2671 94.22 4.53
APC 16x8-E 14.8 41.86 619.6 5,874 44.5 3106 109.56 5.01
APC 16x10-E 14.8 45.53 673.8 5,701 54.0 3075 108.47 4.56
APC 17x8-E 14.8 45.35 671.2 5,703 43.2 3387 119.47 5.05
MAS 12x6x3 14.8 17.62 260.7 7,138 40.6 1606 56.65 6.16
MAS 12x8x3 14.8 24.52 362.9 6,745 51.1 2042 72.03 5.63
MAS 13x8x3 14.8 26.95 398.8 6,629 50.2 2244 79.15 5.63
MAS 14x7x3 14.8 31.18 461.4 6,404 42.5 2606 91.92 5.65
MAS 14x9x3 14.8 36.65 542.4 6,129 52.2 2855 100.71 5.26
MAS 15x7x3 14.8 37.90 561.0 6,079 40.3 3029 106.84 5.40
MAS 16x8x3 14.8 42.71 632.1 5,832 44.2 3341 117.85 5.29
MAS 16x10x3 14.8 51.79 766.5 5,354 50.7 3612 127.41 4.71
 
Prop Prop Input Motor Watts Prop Pitch Thrust  Thrust Thrust Eff.
Manf. Size Voltage Amps Input RPM Speed Grams Ounces Grams/W
APC 10x10-E 18.5 24.06 445.1 8,573 81.2 1269 44.76 2.85
APC 11x8-E 18.5 22.16 410.0 8,694 65.9 1822 64.27 4.44
APC 11x8.5-E 18.5 24.04 444.8 8,544 68.8 1852 65.33 4.16
APC 11x10-E 18.5 28.22 522.1 8,341 79.0 1690 59.61 3.24
APC 12x6-E 18.5 22.95 424.6 8,648 49.1 2245 79.19 5.29
APC 12x8-E 18.5 28.06 519.2 8,297 62.9 2007 70.79 3.87
APC 12x10-E 18.5 34.23 633.2 8,015 75.9 2168 76.47 3.42
APC 12x12-E 18.5 37.68 697.0 7,831 89.0 1979 69.81 2.84
APC 13x6.5-E 18.5 31.48 582.3 8,150 50.2 2760 97.36 4.74
APC 13x8-E 18.5 33.86 626.4 8,022 60.8 2688 94.82 4.29
APC 13x10-E 18.5 44.40 821.3 7,499 71.0 2478 87.41 3.02
APC 14x7-E 18.5 38.01 703.1 7,752 51.4 3136 110.62 4.46
APC 14x8.5-E 18.5 39.45 729.8 7,678 61.8 3253 114.75 4.46
APC 14x10-E 18.5 40.38 747.1 7,687 72.8 3109 109.67 4.16
APC 14x12-E 18.5 55.05 1018.4 6,861 78.0 2495 88.01 2.45
APC 15x4-E 18.5 31.12 575.7 8,181 31.0 3246 114.50 5.64
APC 15x6-E 18.5 40.19 743.5 7,690 43.7 3647 128.64 4.91
APC 15x8-E 18.5 41.94 775.8 7,607 57.6 3540 124.87 4.56
APC 15x10-E 18.5 59.13 1093.9 6,972 66.0 3723 131.32 3.40
MAS 11x7x3 18.5 21.97 406.4 8,597 57.0 2004 70.69 4.93
MAS 11x8x3 18.5 24.03 444.6 8,548 64.8 2098 74.00 4.72
MAS 12x6x3 18.5 24.67 456.4 8,534 48.5 2336 82.40 5.12
MAS 12x8x3 18.5 34.18 632.2 8,028 60.8 2919 102.96 4.62
MAS 13x8x3 18.5 37.30 690.1 7,852 59.5 3183 112.28 4.61
MAS 14x7x3 18.5 42.95 794.6 7,558 50.1 3661 129.14 4.61
MAS 14x9x3 18.5 49.48 915.5 7,139 60.8 3874 136.65 4.23
 
Prop Prop Input Motor Watts Prop Pitch Thrust  Thrust Thrust Eff.
Manf. Size Voltage Amps Input RPM Speed Grams Ounces Grams/W
APC 10x7-E 22.2 21.78 483.4 10,550 69.9 1873 66.07 3.87
APC 10x10-E 22.2 31.47 698.5 9,879 93.6 1685 59.44 2.41
APC 11x5.5-E 22.2 23.85 529.4 10,417 54.3 2425 85.54 4.58
APC 11x7-E 22.2 28.13 624.4 10,132 67.2 2551 89.98 4.09
APC 11x8-E 22.2 30.79 683.6 9,973 75.6 2410 85.01 3.53
APC 11x8.5-E 22.2 33.29 738.9 9,816 79.0 2431 85.75 3.29
APC 11x10-E 22.2 37.90 841.3 9,539 90.3 2228 78.59 2.65
APC 12x6-E 22.2 31.78 705.6 9,912 56.3 3061 107.97 4.34
APC 12x8-E 22.2 37.95 842.6 9,488 71.9 2675 94.36 3.17
APC 12x10-E 22.2 46.38 1029.7 9,064 85.8 2744 96.79 2.66
APC 13x4-E 22.2 26.77 594.3 10,232 38.8 3031 106.91 5.10
APC 13x6.5-E 22.2 42.92 952.7 9,207 56.7 3531 124.55 3.71
APC 13x8-E 22.2 46.34 1028.6 9,024 68.4 3450 121.69 3.35
APC 14x7-E 22.2 53.20 1181.1 8,706 57.7 4027 142.05 3.41
APC 15x4-E 22.2 42.73 948.6 9,246 35.0 4328 152.66 4.56
MAS 10x5x3 22.2 16.62 369.0 10,941 51.8 1827 64.44 4.95
MAS 10x7x3 22.2 24.08 534.6 10,419 69.1 2346 82.75 4.39
MAS 11x7x3 22.2 29.09 645.7 10,084 66.8 2784 98.20 4.31
MAS 11x8x3 22.2 31.64 702.4 9,936 75.3 2833 99.93 4.03
MAS 12x6x3 22.2 32.66 725.1 9,867 56.1 3171 111.85 4.37
MAS 12x8x3 22.2 44.50 987.9 9,167 69.4 3811 134.43 3.86
MAS 13x8x3 22.2 48.83 1084.0 8,896 67.4 4132 145.75 3.81
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.