Tempest 1704-1480 Performance Test Data
Magnets Motor Wind Motor Kv No-Load Current Motor Resistance I Max P Max (3S)
12-Pole 22-Turn Delta 1480 RPM/Volt Io = 0.24 Amps @ 10v Rm = 0.640 Ohms 5 Amps 55 W
 
Stator Outside Diameter Body Length Total Shaft Length Shaft Diameter Motor Weight
9-Slot 21.0 mm,  0.827 in. 15.8 mm,  0.622 in. 25.5 mm,  1.004 in. 2.00 mm,  0.079 in. 14.6 gm,   0.51 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 0.204 A 0.219 A 0.239 A 0.248 A 1467 RPM/Volt @ 10v 0.6402 Ohms
 
2-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 5x4.6-E 2 7.4 2.31 17.1 8,025 35.0 110 3.87 6.43
APC 6x4-E 2 7.4 2.41 17.8 7,900 29.9 119 4.20 6.67
APC 6x4.3-E 2 7.4 3.05 22.5 7,105 28.9 151 5.32 6.70
APC 6x4.5-E 2 7.4 2.97 22.0 7,178 30.6 152 5.37 6.93
APC 6x5.5-E 2 7.4 3.02 22.3 7,093 36.9 105 3.72 4.72
APC 6x6-E 2 7.4 3.25 24.1 6,809 38.7 109 3.85 4.54
APC 7x4-E 2 7.4 3.24 24.0 6,819 25.8 174 6.15 7.27
APC 7x4-SF 2 7.4 3.24 24.0 6,814 25.8 169 5.95 7.03
APC 7x5-E 2 7.4 3.74 27.6 6,127 29.0 154 5.43 5.57
APC 7x5-SF 2 7.4 3.59 26.6 6,364 30.1 166 5.86 6.25
APC 7x6-E 2 7.4 3.95 29.2 5,838 33.2 154 5.43 5.26
APC 7x6-SF 2 7.4 3.94 29.2 5,833 33.1 153 5.39 5.23
APC 8x3.8-SF 2 7.4 4.04 29.9 5,680 20.4 200 7.05 6.69
APC 8x4.7-SF 2 7.4 4.29 31.7 5,269 23.5 200 7.06 6.31
HQ 6x4.5-BN 2 7.4 3.26 24.1 6,741 28.7 152 5.35 6.29
HQ 6x4.5-C 2 7.4 2.64 19.5 7,586 32.3 141 4.97 7.21
HQ 7x4.5-C 2 7.4 3.62 26.8 6,294 26.8 176 6.19 6.56
 
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 5x4.3-E 3 11.1 3.81 42.3 10,787 43.9 185 6.54 4.38
APC 5x4.5-E 3 11.1 3.79 42.1 10,819 46.1 181 6.37 4.29
APC 5x4.6-E 3 11.1 3.84 42.6 10,738 46.8 195 6.89 4.58
APC 6x4-E 3 11.1 4.04 44.9 10,376 39.3 205 7.24 4.58
APC 6x5.5-E 3 11.1 4.80 53.3 9,126 47.5 177 6.26 3.33
APC 6x6-E 3 11.1 4.94 54.8 8,836 50.2 185 6.54 3.38
HQ 5x3-C 3 11.1 1.87 20.7 13,688 38.9 146 5.15 7.05
HQ 5x4-C 3 11.1 2.60 28.8 12,553 47.5 180 6.36 6.25
HQ 5x4.5-BN 3 11.1 3.79 42.0 10,796 46.0 206 7.26 4.90
HQ 5x4.5-C 3 11.1 2.63 29.2 12,500 53.3 176 6.22 6.04
HQ 6x3-C 3 11.1 2.60 28.9 12,541 35.6 188 6.65 6.52
HQ 6x4.5-BN 3 11.1 5.07 56.2 8,543 36.4 242 8.53 4.30
HQ 6x4.5-C 3 11.1 4.29 47.6 9,997 42.6 246 8.68 5.17
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, 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.