Tempest 2814-1700 Performance Test Data
Magnets Motor Wind Motor Kv No-Load Current Motor Resistance I Max P Max (4S)
14-Pole 10-Turn Delta 1700 RPM/Volt Io = 3.49 Amps @ 10v Rm = 0.023 Ohms 60 Amps 890 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 3.069 A 3.492 A 3.875 A 4.254 A 1751 RPM/Volt @ 10v 0.0234 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 7x4-E 3 11.1 28.00 310.8 16,174 61.3 1167 41.16 3.75
APC 7x5-E 3 11.1 34.49 382.8 15,689 74.3 1125 39.68 2.94
APC 7x6-E 3 11.1 36.16 401.4 15,675 89.1 1244 43.88 3.10
APC 7x7-E 3 11.1 43.22 479.7 15,013 99.5 1169 41.23 2.44
APC 8x4-E 3 11.1 40.76 452.4 15,244 57.7 1530 53.97 3.38
APC 8x6-E 3 11.1 53.60 594.9 13,964 79.3 1650 58.20 2.77
APC 8x8-E 3 11.1 61.69 684.8 13,101 99.3 1473 51.96 2.15
APC 9x4.5-E 3 11.1 53.76 596.8 13,917 59.3 2069 72.98 3.47
APC 9x6-E 3 11.1 59.70 662.7 13,288 75.5 1867 65.86 2.82
GemFan 7x6-F 3 11.1 39.34 436.7 15,364 87.3 962 33.93 2.20
GemFan 7.5x4-F 3 11.1 51.65 573.3 14,144 53.6 1499 52.87 2.61
GemFan 8x5-F 3 11.1 37.21 413.1 15,588 73.8 1466 51.71 3.55
GemFan 9x5-F 3 11.1 49.14 545.4 14,404 68.2 1937 68.32 3.55
GemFan 10x6-F 3 11.1 66.71 740.5 12,927 73.4 2368 83.53 3.20
MAS 6x4x3 3 11.1 17.73 196.8 17,136 64.9 747 26.35 3.80
MAS 7x4x3 3 11.1 28.09 311.7 16,176 61.3 1103 38.91 3.54
MAS 8x6x3 3 11.1 51.93 576.5 14,129 80.3 1848 65.19 3.21
 
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 6x4-E 4 14.8 26.87 397.7 22,250 84.3 1040 36.68 2.61
APC 6x4.3-E 4 14.8 35.39 523.7 21,375 87.0 1446 51.01 2.76
APC 6x4.5-E 4 14.8 33.58 497.0 21,590 92.0 1452 51.22 2.92
APC 6x5.5-E 4 14.8 31.79 470.5 21,743 113.2 1089 38.41 2.31
APC 6x6-E 4 14.8 36.30 537.2 21,290 121.0 1100 38.80 2.05
APC 6.5x5.0-P 4 14.8 34.92 516.8 21,600 102.3 1184 41.76 2.29
APC 6.5x5.5-P 4 14.8 36.71 543.3 21,420 111.6 1200 42.33 2.21
APC 6.5x6.0-P 4 14.8 40.41 598.1 21,030 119.5 1197 42.22 2.00
APC 6.5x6.5-P 4 14.8 42.31 626.1 20,850 128.3 1167 41.16 1.86
APC 7x4-E 4 14.8 48.12 712.2 20,055 76.0 1814 63.99 2.55
APC 7x5-E 4 14.8 56.95 842.9 19,247 91.1 1729 60.99 2.05
APC 7x6-E 4 14.8 58.43 864.7 19,071 108.4 1827 64.44 2.11
APC 7x7-E 4 14.8 68.05 1007.1 18,439 122.2 1738 61.31 1.73
APC 8x4-E 4 14.8 65.92 975.6 18,625 70.5 2275 80.25 2.33
MAS 6x4x3 4 14.8 28.41 420.4 22,264 84.3 1252 44.16 2.98
MAS 7x4x3 4 14.8 44.32 655.9 20,633 78.2 1803 63.60 2.75
 
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 5x4.3E 5 18.5 33.44 618.6 27,367 111.4 1238 43.67 2.00
APC 5x4.5-E 5 18.5 36.22 670.0 27,003 115.1 1235 43.56 1.84
APC 5x4.6-E 5 18.5 34.69 641.8 27,176 118.4 1315 46.38 2.05
APC 6x4-E 5 18.5 40.17 743.1 26,605 100.8 1458 51.43 1.96
APC 6x4.3-E 5 18.5 51.97 961.5 25,475 103.7 2080 73.37 2.16
APC 6x4.5-E 5 18.5 47.69 882.3 25,968 110.7 2066 72.88 2.34
APC 6x5.5-E 5 18.5 47.00 869.6 25,882 134.8 1516 53.47 1.74
APC 6x6-E 5 18.5 52.33 968.1 25,284 143.7 1517 53.51 1.57
APC 6.5x5.0-P 5 18.5 50.53 934.8 25,644 121.4 1663 58.66 1.78
APC 6.5x5.5-P 5 18.5 53.61 991.7 25,299 131.8 1680 59.26 1.69
APC 6.5x6.0-P 5 18.5 58.29 1078.4 24,770 140.7 1634 57.64 1.52
APC 6.5x6.5-P 5 18.5 60.69 1122.7 24,498 150.8 1563 55.13 1.39
APC 7x4-E 5 18.5 73.75 1364.3 23,481 88.9 2498 88.11 1.83
MAS 6x4x3 5 18.5 40.00 740.0 26,666 101.0 1741 61.41 2.35
MAS 7x4x3 5 18.5 64.71 1197.2 24,197 91.7 2369 83.56 1.98
 
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 46.75 1037.9 31,604 128.7 1672 58.98 1.61
APC 5x4.5-E 6 22.2 51.65 1146.7 31,116 132.6 1653 58.31 1.44
APC 5x4.6-E 6 22.2 49.22 1092.7 31,438 136.9 1783 62.89 1.63
APC 6x4-E 6 22.2 56.01 1243.4 30,679 116.2 1912 67.44 1.54
APC 6x5.5-E 6 22.2 65.17 1446.7 29,868 155.6 1982 69.91 1.37
MAS 6x4x3 6 22.2 55.94 1241.8 30,743 116.5 2138 75.41 1.72
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.