Tempest 2814-1400 Performance Test Data
Magnets Motor Wind Motor Kv No-Load Current Motor Resistance I Max P Max (4S)
14-Pole 12-Turn Delta 1400 RPM/Volt Io = 2.48 Amps @ 10v Rm = 0.029 Ohms 50 Amps 740 W
 
Stator Outside Diameter Body Length Total Shaft Length Shaft Diameter Motor Weight
12-Slot 35.4 mm,  1.394 in. 32.4 mm,  1.276 in. 54.8 mm,  2.157 in. 5.00 mm,  0.197 in. 108 gm,   3.81 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 2.290 A 2.483 A 2.808 A 3.024 A 1440 RPM/Volt @ 10v 0.0288 Ohms
 
3-cell Li-Po Test Data
Prop Prop Li-Po Input Motor Input Prop Pitch Speed Thrust  Thrust Thrust Eff.
Manf. Size Cells Voltage Amps Watts RPM in MPH Grams Ounces Grams/W
APC 7x5-E 3 11.1 20.52 227.8 13,614 64.5 842 29.70 3.70
APC 7x6-E 3 11.1 21.42 237.8 13,497 76.7 909 32.06 3.82
APC 7x7-E 3 11.1 28.30 314.1 13,444 89.1 933 32.91 2.97
APC 8x4-E 3 11.1 25.75 285.9 13,523 51.2 1202 42.40 4.20
APC 8x4-F 3 11.1 17.61 195.5 13,834 52.4 833 29.38 4.26
APC 8x6-E 3 11.1 35.47 393.7 12,643 71.8 1344 47.41 3.41
APC 8x8-E 3 11.1 43.38 481.5 12,020 91.1 1248 44.02 2.59
APC 9x4.5-E 3 11.1 35.79 397.3 12,610 53.7 1668 58.84 4.20
APC 9x5-F 3 11.1 28.09 311.8 12,897 61.1 1328 46.84 4.26
APC 9x6-E 3 11.1 40.69 451.6 12,126 68.9 1589 56.05 3.52
APC 9x7.5-E 3 11.1 60.15 667.6 10,938 77.7 1559 54.99 2.34
APC 10x5-E 3 11.1 49.58 550.3 11,711 55.4 1940 68.43 3.53
APC 10x6-E 3 11.1 54.53 605.3 11,475 65.2 2015 71.08 3.33
APC 10x6-F 3 11.1 39.71 440.8 11,882 67.5 1761 62.12 4.00
BadAss 10x5-W 3 11.1 42.69 473.9 12,049 57.1 1775 62.61 3.75
BadAss 10x6-W 3 11.1 56.16 623.4 11,275 64.1 1669 58.87 2.68
GemFan 7x6-F 3 11.1 24.52 272.2 13,205 75.0 698 24.62 2.56
GemFan 7.5x4-F 3 11.1 32.17 357.0 12,475 47.3 1158 40.85 3.24
GemFan 8x5-F 3 11.1 22.82 253.3 13,361 63.3 1081 38.13 4.27
GemFan 9x5-F 3 11.1 31.02 344.3 12,620 59.8 1491 52.59 4.33
GemFan 10x6-F 3 11.1 43.00 477.3 11,580 65.8 1884 66.46 3.95
GemFan 11x8-F 3 11.1 70.26 779.8 9,575 72.5 2038 71.89 2.61
MAS 7x4x3 3 11.1 17.08 189.6 13,887 52.6 804 28.36 4.24
MAS 8x6x3 3 11.1 32.85 364.7 12,462 70.8 1434 50.58 3.93
MAS 9x7x3 3 11.1 47.56 527.9 11,138 73.8 1875 66.14 3.55
 
4-cell Li-Po Test Data
Prop Prop Li-Po Input Motor Input Prop Pitch Speed Thrust  Thrust Thrust Eff.
Manf. Size Cells Voltage Amps Watts RPM in MPH Grams Ounces Grams/W
APC 7x4-E 4 14.8 27.83 411.9 17,690 67.0 1416 49.95 3.44
APC 7x4-F 4 14.8 19.56 289.4 18,436 69.8 836 29.49 2.89
APC 7x5-E 4 14.8 34.39 508.9 17,285 81.8 1356 47.83 2.66
APC 7x6-E 4 14.8 37.18 550.2 17,177 97.6 1480 52.20 2.69
APC 7x6-F 4 14.8 27.44 406.1 17,666 100.4 973 34.32 2.40
APC 7x7-E 4 14.8 44.01 651.3 16,444 109.0 1407 49.63 2.16
APC 8x4-E 4 14.8 41.22 610.0 16,610 62.9 1823 64.30 2.99
APC 8x6-E 4 14.8 60.32 892.7 15,610 88.7 2087 73.62 2.34
APC 9x4.5-E 4 14.8 59.96 887.5 15,589 66.4 2659 93.79 3.00
APC 9x6-E 4 14.8 68.17 1008.9 14,990 85.2 2533 89.35 2.51
GemFan 7x6-F 4 14.8 36.26 536.7 16,811 95.5 1139 40.18 2.12
GemFan 7.5x4-F 4 14.8 50.45 746.7 15,460 58.6 1800 63.49 2.41
GemFan 8x5-F 4 14.8 34.74 514.1 16,955 80.3 1728 60.95 3.36
GemFan 9x5-F 4 14.8 47.66 705.4 15,759 74.6 2320 81.83 3.29
MAS 6x4x3 4 14.8 16.90 250.2 18,717 70.9 887 31.29 3.55
MAS 7x4x3 4 14.8 26.82 397.0 17,728 67.2 1336 47.13 3.37
MAS 8x6x3 4 14.8 50.81 751.9 15,462 87.9 2264 79.86 3.01
 
5-cell Li-Po Test Data
Prop Prop Li-Po Input Motor Input Prop Pitch Speed Thrust  Thrust Thrust Eff.
Manf. Size Cells Voltage Amps Watts RPM in MPH Grams Ounces Grams/W
APC 6x4-E 5 18.5 23.65 437.6 22,933 86.9 1107 39.05 2.53
APC 6x4.3-E 5 18.5 30.99 573.3 22,190 90.4 1554 54.82 2.71
APC 6x4.5-E 5 18.5 28.75 531.8 22,425 95.6 1537 54.22 2.89
APC 6x5.5-E 5 18.5 27.73 513.0 22,512 117.3 1171 41.31 2.28
APC 6x6-E 5 18.5 31.64 585.3 22,100 125.6 1179 41.59 2.01
APC 6.5x5.0-P 5 18.5 29.97 554.4 22,261 105.4 1254 44.23 2.26
APC 6.5x5.5-P 5 18.5 31.74 587.2 22,088 115.0 1276 45.01 2.17
APC 6.5x6.0-P 5 18.5 35.21 651.3 21,710 123.4 1283 45.26 1.97
APC 6.5x6.5-P 5 18.5 36.87 682.2 21,551 132.7 1253 44.20 1.84
APC 7x4-E 5 18.5 43.19 799.0 20,868 79.0 1960 69.14 2.45
APC 7x5-E 5 18.5 53.36 987.1 20,300 96.1 1916 67.58 1.94
APC 7x6-E 5 18.5 53.55 990.7 20,113 114.3 2050 72.31 2.07
MAS 6x4x3 5 18.5 24.32 450.0 22,933 86.9 1335 47.09 2.97
MAS 7x4x3 5 18.5 38.65 715.0 21,392 81.0 1900 67.02 2.66
 
6-cell Li-Po Test Data
Prop Prop Li-Po Input Motor Input Prop Pitch Speed Thrust  Thrust Thrust Eff.
Manf. Size Cells Voltage Amps Watts RPM in MPH Grams Ounces Grams/W
APC 5x4.3E 6 22.2 27.02 599.9 27,438 111.7 1252 44.16 2.09
APC 5x4.5-E 6 22.2 29.26 649.5 27,185 115.8 1247 43.99 1.92
APC 5x4.6-E 6 22.2 28.05 622.7 27,330 119.1 1325 46.74 2.13
APC 6x4-E 6 22.2 32.83 728.9 26,790 101.5 1467 51.75 2.01
APC 6x4.3-E 6 22.2 42.77 949.5 25,686 104.6 2093 73.83 2.20
APC 6x4.5-E 6 22.2 38.99 865.6 26,102 111.2 2106 74.29 2.43
APC 6x5.5-E 6 22.2 38.72 859.5 26,125 136.1 1544 54.46 1.80
APC 6x6-E 6 22.2 43.61 968.1 25,593 145.4 1555 54.85 1.61
APC 6.5x5.0-P 6 22.2 41.39 918.9 25,819 122.2 1692 59.68 1.84
APC 6.5x5.5-P 6 22.2 44.04 977.6 25,520 132.9 1698 59.89 1.74
APC 6.5x6.0-P 6 22.2 48.85 1084.5 25,356 144.1 1707 60.21 1.57
APC 6.5x6.5-P 6 22.2 50.73 1126.2 24,767 152.4 1595 56.26 1.42
MAS 6x4x3 6 22.2 32.68 725.4 26,812 101.6 1764 62.22 2.43
MAS 7x4x3 6 22.2 53.49 1187.4 24,717 93.6 2424 85.50 2.04
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)
Notes about Propellers used in the Motor Tests
APC Props with -E on the part number are from the APC Thin Electric Series.  Example:  APC 10x6-E
APC Props with -F on the part number are from the APC Folding Electric Series.  Example:  APC 11x8-F
APC Props with -SF on the part number are from the APC Slow-Fly Electric Series.  Example:  APC 10x4.7-SF
APC Props with -P on the part number are from the APC Pylon Racing Series.  Example:  APC 6.5x5.5-P
BadAss Props with -W on the part number are from the BadAss Electric Wood Series.  Example:  BadAss 11x6-W
GemFan Props with -F on the part number are from the GemFan Folding Electric Series.  Example:  GemFan 10x6-F
MAS Props are Master Airscrew 3-Blade Propellers.  Example:  MAS 10x5x3
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.