Cobra C2826/10 Motor Propeller Data
Motor Wind Motor Kv No-Load Current Motor Resistance I Max P Max (3S)
10-Turn Delta 930 RPM/Volt Io = 1.30 Amps @ 10v Rm = 0.032 Ohms 45 Amps 500 W 
 
Outside Diameter Body Length Total Shaft Length Shaft Diameter Motor Weight
35.0 mm,  1.38 in. 46.0 mm,  1.81 in. 66.0 mm,  2.60 in. 5.00 mm,  0.197 in. 171 gm,   6.03 oz
 
Prop Prop Input Motor Watts Prop Pitch Thrust  Thrust Thrust Eff.
Manf. Size Voltage Amps Input RPM Speed Grams Ounces Grams/W
APC 9x7.5-E 11.1 19.57 217.2 8,425 59.8 924 32.59 4.25
APC 9x9-E 11.1 23.56 261.5 8,194 69.8 928 32.73 3.55
APC 10x7-E 11.1 20.13 223.4 8,345 55.3 1222 43.10 5.47
APC 10x10-E 11.1 29.79 330.7 7,843 74.3 1136 40.07 3.44
APC 11x5.5-E 11.1 22.06 244.9 8,292 43.2 1451 51.18 5.92
APC 11x7-E 11.1 26.24 291.2 8,051 53.4 1542 54.39 5.29
APC 11x8-E 11.1 28.50 316.3 7,919 60.0 1512 53.33 4.78
APC 11x8.5-E 11.1 30.72 341.0 7,799 62.8 1548 54.60 4.54
APC 11x10-E 11.1 36.00 399.6 7,497 71.0 1409 49.70 3.53
APC 12x6-E 11.1 28.67 318.2 7,913 45.0 1795 63.32 5.64
APC 12x8-E 11.1 35.89 398.4 7,503 56.8 1644 57.99 4.13
APC 12x10-E 11.1 41.04 455.5 7,201 68.2 1782 62.86 3.91
APC 13x4-E 11.1 22.80 253.1 8,241 31.2 1670 58.91 6.60
APC 13x6.5-E 11.1 38.33 425.5 7,361 45.3 2174 76.68 5.11
APC 13x8-E 11.1 41.41 459.6 7,192 54.5 2166 76.40 4.71
APC 13x10-E 11.1 48.36 536.8 6,772 64.1 2065 72.84 3.85
APC 14x7-E 11.1 45.68 507.1 6,927 45.9 2488 87.76 4.91
APC 15x4-E 11.1 38.28 424.9 7,374 27.9 2519 88.85 5.93
APC 15x6-E 11.1 47.49 527.1 6,807 38.7 2716 95.80 5.15
MAS 9x7x3 11.1 21.41 237.6 8,863 58.8 1234 43.53 5.19
MAS 10x5x3 11.1 19.25 213.7 8,991 42.6 1251 44.13 5.85
MAS 10x7x3 11.1 27.63 306.7 8,495 56.3 1568 55.31 5.11
MAS 11x7x3 11.1 32.90 365.2 8,173 54.2 1853 65.36 5.07
MAS 11x8x3 11.1 35.07 389.3 8,017 60.7 1884 66.46 4.84
MAS 12x6x3 11.1 36.15 401.3 7,932 45.1 2079 73.33 5.18
MAS 12x8x3 11.1 46.88 520.4 7,231 54.8 2419 85.33 4.65
 
Prop Prop Input Motor Watts Prop Pitch Thrust  Thrust Thrust Eff.
Manf. Size Voltage Amps Input RPM Speed Grams Ounces Grams/W
APC 8x6-E 14.8 21.16 313.1 11,345 64.5 1136 40.07 3.63
APC 8x8-E 14.8 26.63 394.1 10,938 82.9 1069 37.71 2.71
APC 9x6-E 14.8 21.87 323.6 11,267 64.0 1379 48.64 4.26
APC 9x7.5-E 14.8 33.32 493.2 10,591 75.2 1478 52.13 3.00
APC 9x9-E 14.8 37.42 553.7 10,326 88.0 1509 53.23 2.73
APC 10x5-E 14.8 26.86 397.6 10,983 52.0 1771 62.47 4.45
APC 10x6-E 14.8 28.76 425.6 10,819 61.5 1860 65.61 4.37
APC 10x7-E 14.8 33.18 491.0 10,579 70.1 2011 70.94 4.10
APC 11x5.5-E 14.8 36.66 542.5 10,372 54.0 2386 84.16 4.40
APC 11x7-E 14.8 42.91 635.1 10,001 66.3 2507 88.43 3.95
APC 11x8-E 14.8 46.26 684.7 9,766 74.0 2348 82.82 3.43
APC 12x6-E 14.8 46.95 694.9 9,724 55.3 2889 101.91 4.16
APC 13x4-E 14.8 35.93 531.7 10,358 39.2 2719 95.91 5.11
MAS 8x6x3 14.8 22.09 326.9 12,054 68.5 1394 49.17 4.26
MAS 9x7x3 14.8 33.28 492.6 11,216 74.3 2039 71.92 4.14
MAS 10x5x3 14.8 30.69 454.2 11,463 54.3 2063 72.77 4.54
MAS 10x7x3 14.8 43.03 636.8 10,600 70.3 2498 88.11 3.92
MAS 11x7x3 14.8 50.48 747.1 10,084 66.8 2822 99.54 3.78
 
Prop Prop Input Motor Watts Prop Pitch Thrust  Thrust Thrust Eff.
Manf. Size Voltage Amps Input RPM Speed Grams Ounces Grams/W
APC 8x4-E 18.5 19.54 361.5 14,584 55.2 1436 50.65 3.97
APC 8x6-E 18.5 32.11 594.1 13,689 77.8 1690 59.61 2.84
APC 8x8-E 18.5 40.45 748.4 13,038 98.8 1548 54.60 2.07
APC 9x4.5-E 18.5 28.53 527.8 13,944 59.4 2127 75.03 4.03
APC 9x6-E 18.5 32.99 610.3 13,626 77.4 2043 72.06 3.35
APC 9x7.5-E 18.5 49.19 910.0 12,404 88.1 2080 73.37 2.29
APC 10x5-E 18.5 40.83 755.3 13,069 61.9 2501 88.22 3.31
APC 10x6-E 18.5 42.79 791.6 12,940 73.5 2695 95.06 3.40
APC 10x7-E 18.5 49.39 913.8 12,457 82.6 2800 98.77 3.06
MAS 8x6x3 18.5 30.46 563.5 14,513 82.5 2061 72.70 3.66
MAS 9x7x3 18.5 46.47 859.7 13,353 88.5 2894 102.08 3.37
MAS 10x5x3 18.5 42.57 787.5 13,650 64.6 3022 106.60 3.84
MAS 10x7x3 18.5 58.01 1073.2 12,550 83.2 3475 122.58 3.24
 
Prop Prop Input Motor Watts Prop Pitch Thrust  Thrust Thrust Eff.
Manf. Size Voltage Amps Input RPM Speed Grams Ounces Grams/W
APC 7x4-E 22.2 18.33 407.0 17,752 67.2 1412 49.81 3.47
APC 7x5-E 22.2 23.06 511.9 17,357 82.2 1440 50.79 2.81
APC 7x6-E 22.2 24.03 533.6 17,285 98.2 1548 54.60 2.90
APC 8x4-E 22.2 28.25 627.2 16,958 64.2 1960 69.14 3.13
APC 8x6-E 22.2 45.97 1020.6 15,609 88.7 2202 77.67 2.16
APC 9x4.5-E 22.2 40.01 888.3 16,060 68.4 2936 103.56 3.31
APC 9x6-E 22.2 45.72 1014.9 15,552 88.4 2666 94.04 2.63
MAS 8x6x3 22.2 40.12 890.7 16,781 95.3 2762 97.43 3.10
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.