Tempest 2808-1000 Performance Test Data
Magnets Motor Wind Motor Kv No-Load Current Motor Resistance I Max P Max (4S)
14-Pole 30-Turn Delta 1000 RPM/Volt Io = 1.12 Amps @ 10v Rm = 0.093 Ohms 22 Amps 325 W
 
Stator Outside Diameter Body Length Total Shaft Length Shaft Diameter Motor Weight
12-Slot 35.4 mm,  1.394 in. 26.3 mm,  1.035 in. 48.8 mm,  1.921 in. 5.00 mm,  0.197 in. 78.4 gm,   2.77 oz
 
Test Data From Input 6.0 V 8.0 V 10.0V 12.0V Measured Kv value Measured Rm Value
Sample Motor Io Value 0.897 A 0.952 A 1.121 A 1.255 A 1042 RPM/Volt @ 10v 0.0927 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 7x7-E 3 11.1 9.28 103.0 9,447 62.6 464 16.37 4.50
APC 8x4-E 3 11.1 8.20 91.0 9,586 36.3 569 20.07 6.25
APC 8x6-E 3 11.1 11.60 128.8 9,080 51.6 668 23.56 5.19
APC 8x8-E 3 11.1 14.45 160.3 8,615 65.3 630 22.22 3.93
APC 9x4.5-E 3 11.1 11.68 129.6 9,080 38.7 790 27.87 6.10
APC 9x5-F 3 11.1 10.25 113.8 9,315 44.1 656 23.14 5.77
APC 9x6-E 3 11.1 13.52 150.0 8,788 49.9 803 28.32 5.35
APC 9x7.5-E 3 11.1 19.04 211.3 7,865 55.9 791 27.90 3.74
APC 9x9-E 3 11.1 21.69 240.7 7,336 62.5 698 24.62 2.90
APC 10x5-E 3 11.1 15.66 173.8 8,414 39.8 978 34.50 5.63
APC 10x6-E 3 11.1 17.30 192.0 8,146 46.3 1019 35.94 5.31
APC 10x6-F 3 11.1 14.68 163.0 8,587 48.8 889 31.36 5.45
APC 10x7-E 3 11.1 19.52 216.7 7,783 51.6 1020 35.98 4.71
APC 10x8-E 3 11.1 21.34 236.8 7,398 56.0 946 33.37 3.99
APC 11x5.5-E 3 11.1 20.48 227.3 7,549 39.3 1190 41.98 5.24
APC 11x7-E 3 11.1 22.59 250.7 7,105 47.1 1173 41.38 4.68
APC 11x8-F 3 11.1 21.54 239.1 7,279 55.1 1115 39.33 4.66
BadAss 10x5-W 3 11.1 14.94 165.8 8,565 40.6 887 31.29 5.35
BadAss 10x6-W 3 11.1 18.37 203.9 7,974 45.3 886 31.25 4.34
BadAss 10x7-W 3 11.1 19.89 220.8 7,696 51.0 783 27.62 3.55
BadAss 10x8-W 3 11.1 21.51 238.8 7,358 55.7 826 29.14 3.46
BadAss 11x5-W 3 11.1 18.35 203.7 7,983 37.8 1053 37.14 5.17
BadAss 11x6-W 3 11.1 20.57 228.4 7,552 42.9 1132 39.93 4.96
BadAss 11x7-W 3 11.1 20.89 231.9 7,525 49.9 1116 39.37 4.81
BadAss 11x8-W 3 11.1 24.21 268.8 6,727 51.0 884 31.18 3.29
GemFan 7x6-F 3 11.1 9.66 107.2 9,416 53.5 347 12.24 3.24
GemFan 7.5x4-F 3 11.1 13.03 144.7 8,850 33.5 496 17.50 3.43
GemFan 8x5-F 3 11.1 8.79 97.6 9,505 45.0 558 19.68 5.72
GemFan 9x5-F 3 11.1 11.27 125.1 9,069 42.9 765 26.98 6.11
GemFan 10x6-F 3 11.1 16.01 177.8 8,375 47.6 977 34.46 5.50
MAS 7x4x3 3 11.1 6.48 71.9 9,840 37.3 361 12.73 5.02
MAS 8x6x3 3 11.1 12.38 137.4 8,967 50.9 684 24.13 4.98
MAS 9x7x3 3 11.1 18.01 200.0 8,029 53.2 928 32.73 4.64
MAS 10x5x3 3 11.1 16.50 183.2 8,278 39.2 1002 35.34 5.47
MAS 10x7x3 3 11.1 21.47 238.4 7,358 48.8 1121 39.54 4.70
 
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 9.38 138.8 12,843 48.6 694 24.48 5.00
APC 7x4-F 4 14.8 7.06 104.5 13,218 50.1 415 14.64 3.97
APC 7x5-E 4 14.8 11.62 171.9 12,450 58.9 696 24.55 4.05
APC 7x6-E 4 14.8 12.18 180.3 12,350 70.2 757 26.70 4.20
APC 7x6-F 4 14.8 10.14 150.1 12,695 72.1 487 17.18 3.24
APC 7x7-E 4 14.8 14.80 219.0 11,950 79.2 751 26.49 3.43
APC 8x4-E 4 14.8 13.45 199.0 12,138 46.0 949 33.47 4.77
APC 8x4-F 4 14.8 10.07 149.0 12,706 48.1 683 24.09 4.58
APC 8x6-E 4 14.8 18.66 276.2 11,275 64.1 1061 37.43 3.84
APC 8x8-E 4 14.8 22.15 327.8 10,563 80.0 962 33.94 2.94
APC 9x4.5-E 4 14.8 18.69 276.6 11,251 47.9 1282 45.22 4.63
APC 9x5-F 4 14.8 16.20 239.7 11,725 55.5 1078 38.02 4.50
APC 9x6-E 4 14.8 21.20 313.7 10,763 61.2 1246 43.95 3.97
APC 10x6-F 4 14.8 22.11 327.2 10,541 59.9 1366 48.18 4.18
GemFan 7x6-F 4 14.8 14.61 216.2 11,966 68.0 575 20.28 2.66
GemFan 7.5x4-F 4 14.8 19.90 294.5 11,025 41.8 783 27.62 2.66
GemFan 8x5-F 4 14.8 13.58 201.0 12,116 57.4 912 32.17 4.54
GemFan 9x5-F 4 14.8 17.97 265.9 11,398 54.0 1216 42.89 4.57
GemFan 10x6-F 4 14.8 24.15 357.5 10,375 58.9 1492 52.63 4.17
MAS 7x4x3 4 14.8 10.03 148.4 12,737 48.2 665 23.46 4.48
MAS 8x6x3 4 14.8 18.87 279.3 11,220 63.8 1147 40.46 4.11
MAS 9x7x3 4 14.8 27.32 404.3 10,032 66.5 1508 53.19 3.73
MAS 10x5x3 4 14.8 25.11 371.7 10,261 48.6 1573 55.49 4.23
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
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.