Tempest 2814-1050 Performance Test Data
Magnets Motor Wind Motor Kv No-Load Current Motor Resistance I Max P Max (4S)
14-Pole 16-Turn Delta 1050 RPM/Volt Io = 2.24 Amps @ 10v Rm = 0.048 Ohms 40 Amps 590 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. 107 gm,   3.77 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 1.949 A 2.235 A 2.327 A 2.456 A 1116 RPM/Volt @ 10v 0.0476 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 8x4-E 3 11.1 14.68 163.0 11,367 43.1 818 28.85 5.02
APC 8x6-E 3 11.1 20.30 225.3 10,813 61.4 953 33.62 4.23
APC 8x8-E 3 11.1 25.08 278.4 10,340 78.3 904 31.89 3.25
APC 9x4.5-E 3 11.1 20.62 228.9 10,784 46.0 1162 40.99 5.08
APC 9x5-F 3 11.1 17.85 198.2 11,082 52.5 959 33.83 4.84
APC 9x6-E 3 11.1 23.77 263.8 10,469 59.5 1161 40.95 4.40
APC 9x7.5-E 3 11.1 33.30 369.6 9,385 66.7 1133 39.96 3.07
APC 9x9-E 3 11.1 36.53 405.5 8,969 76.4 1066 37.60 2.63
APC 10x5-E 3 11.1 27.10 300.8 10,013 47.4 1411 49.76 4.69
APC 10x6-E 3 11.1 29.72 329.8 9,730 55.3 1448 51.08 4.39
APC 10x6-F 3 11.1 25.43 282.2 10,299 58.5 1305 46.03 4.62
APC 10x7-E 3 11.1 34.04 377.8 9,289 61.6 1421 50.12 3.76
APC 10x8-E 3 11.1 36.57 405.9 8,971 68.0 1401 49.42 3.45
APC 10x10-E 3 11.1 43.97 488.1 8,012 75.9 1099 38.77 2.25
APC 11x5.5-E 3 11.1 35.77 397.1 9,041 47.1 1746 61.59 4.40
APC 11x7-E 3 11.1 39.74 441.1 8,517 56.5 1735 61.20 3.93
APC 11x8-F 3 11.1 37.57 417.0 8,810 66.7 1670 58.91 4.00
BadAss 10x5-W 3 11.1 25.37 281.6 10,325 48.9 1277 45.04 4.54
BadAss 10x6-W 3 11.1 31.89 354.0 9,560 54.3 1203 42.43 3.40
BadAss 10x7-W 3 11.1 33.89 376.1 9,329 61.8 1128 39.79 3.00
BadAss 10x8-W 3 11.1 36.58 406.0 8,954 67.8 1195 42.15 2.94
BadAss 11x5-W 3 11.1 31.23 346.6 9,629 45.6 1515 53.44 4.37
BadAss 11x6-W 3 11.1 35.47 393.7 9,168 52.1 1672 58.98 4.25
BadAss 11x7-W 3 11.1 35.70 396.2 9,111 60.4 1633 57.60 4.12
BadAss 11x8-W 3 11.1 41.85 464.5 8,232 62.4 1310 46.21 2.82
GemFan 7x6-F 3 11.1 16.23 180.2 11,236 63.8 504 17.78 2.80
GemFan 7.5x4-F 3 11.1 22.46 249.3 10,614 40.2 723 25.50 2.90
GemFan 8x5-F 3 11.1 14.84 164.7 11,372 53.8 792 27.94 4.81
GemFan 9x5-F 3 11.1 20.03 222.4 10,861 51.4 1103 38.92 4.96
GemFan 10x6-F 3 11.1 27.62 306.5 10,035 57.0 1420 50.09 4.63
GemFan 11x8-F 3 11.1 42.17 468.1 8,171 61.9 1474 51.99 3.15
MAS 8x6x3 3 11.1 21.03 233.4 10,765 61.2 1052 37.11 4.51
MAS 9x7x3 3 11.1 30.60 339.6 9,716 64.4 1413 49.84 4.16
MAS 10x5x3 3 11.1 28.24 313.4 9,971 47.2 1480 52.20 4.72
MAS 10x7x3 3 11.1 37.01 410.8 8,897 59.0 1655 58.38 4.03
 
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 16.08 238.0 15,044 57.0 976 34.43 4.10
APC 7x5-E 4 14.8 20.07 297.0 14,634 69.3 973 34.32 3.28
APC 7x6-E 4 14.8 20.74 307.0 14,559 82.7 1059 37.35 3.45
APC 7x7-E 4 14.8 25.30 374.4 14,070 93.3 1026 36.19 2.74
APC 8x4-E 4 14.8 23.53 348.2 14,260 54.0 1339 47.23 3.85
APC 8x4-F 4 14.8 17.42 257.8 14,909 56.5 981 34.60 3.80
APC 8x6-E 4 14.8 32.14 475.7 13,298 75.6 1490 52.56 3.13
APC 8x8-E 4 14.8 37.91 561.1 12,569 95.2 1360 47.97 2.42
APC 9x4.5-E 4 14.8 32.31 478.2 13,265 56.5 1859 65.57 3.89
APC 9x6-E 4 14.8 36.55 540.9 12,742 72.4 1739 61.34 3.21
APC 10x5-E 4 14.8 41.43 613.1 12,022 56.9 2056 72.52 3.35
BadAss 10x5-W 4 14.8 37.34 552.7 12,629 59.8 1927 67.97 3.49
BadAss 10x6-W 4 14.8 48.33 715.3 11,775 66.9 1827 64.44 2.55
GemFan 7x6-F 4 14.8 23.53 348.2 14,270 81.1 823 29.03 2.36
GemFan 7.5x4-F 4 14.8 31.04 459.3 13,399 50.8 1338 47.20 2.91
GemFan 8x5-F 4 14.8 22.03 326.0 14,435 68.3 1270 44.80 3.90
GemFan 9x5-F 4 14.8 29.85 441.7 13,573 64.3 1724 60.81 3.90
GemFan 10x6-F 4 14.8 41.08 607.9 12,450 70.7 2187 77.14 3.60
MAS 7x4x3 4 14.8 16.67 246.7 15,006 56.8 937 33.05 3.80
MAS 8x6x3 4 14.8 31.41 464.9 13,383 76.0 1656 58.41 3.56
MAS 9x7x3 4 14.8 45.44 672.4 12,008 79.6 2162 76.26 3.22
MAS 10x5x3 4 14.8 42.37 627.0 12,333 58.4 2312 81.55 3.69
 
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 6x6-E 5 18.5 18.26 337.8 18,525 105.3 826 29.14 2.45
APC 7x4-E 5 18.5 23.86 441.5 17,904 67.8 1464 51.64 3.32
APC 7x5-E 5 18.5 29.15 539.2 17,308 82.0 1396 49.24 2.59
APC 7x6-E 5 18.5 29.96 554.2 17,214 97.8 1484 52.35 2.68
APC 7x7-E 5 18.5 35.77 661.7 16,500 109.4 1415 49.91 2.14
APC 8x4-E 5 18.5 34.00 629.0 16,708 63.3 1836 64.76 2.92
GemFan 7x6-F 5 18.5 31.09 575.2 17,069 97.0 1183 41.73 2.06
GemFan 7.5x4-F 5 18.5 43.19 798.9 15,738 59.6 1890 66.67 2.37
GemFan 8x5-F 5 18.5 29.90 553.2 17,215 81.5 1799 63.46 3.25
GemFan 9x5-F 5 18.5 40.72 753.3 16,053 76.0 2423 85.47 3.22
MAS 7x4x3 5 18.5 23.06 426.6 18,001 68.2 1367 48.22 3.20
MAS 8x6x3 5 18.5 42.33 783.0 15,611 88.7 2280 80.42 2.91
 
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 6x4-E 6 22.2 17.73 393.7 22,226 84.2 1035 36.51 2.63
APC 6x4.3E 6 22.2 23.65 525.0 21,532 87.7 1455 51.32 2.77
APC 6x4.5-E 6 22.2 22.30 495.0 21,695 92.5 1444 50.94 2.92
APC 6x5.5-E 6 22.2 21.39 474.9 21,795 113.5 1091 38.48 2.30
APC 6x6-E 6 22.2 24.42 542.1 21,404 121.6 1109 39.12 2.05
APC 6.5x5.0-P 6 22.2 23.03 511.3 21,621 102.4 1181 41.66 2.31
APC 6.5x5.5-P 6 22.2 24.36 540.7 21,451 111.7 1211 42.72 2.24
APC 6.5x6.0-P 6 22.2 26.94 598.1 21,171 120.3 1215 42.86 2.03
APC 6.5x6.5-P 6 22.2 28.29 628.0 21,011 129.3 1187 41.87 1.89
APC 7x4-E 6 22.2 33.26 738.4 20,394 77.3 1905 67.20 2.58
APC 7x5-E 6 22.2 39.36 873.9 19,582 92.7 1795 63.32 2.05
APC 7x6-E 6 22.2 40.87 907.4 19,650 111.6 1943 68.54 2.14
GemFan 7x6-F 6 22.2 38.73 859.8 19,549 111.1 1557 54.92 1.81
MAS 6x4x3 6 22.2 18.57 412.2 22,150 83.9 1230 43.39 2.98
MAS 7x4x3 6 22.2 29.98 665.5 20,804 78.8 1820 64.20 2.73
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.