Tempest 1708-1700 Performance Test Data
Magnets Motor Wind Motor Kv No-Load Current Motor Resistance I Max P Max (3S)
12-Pole 9-Turn Delta 1700 RPM/Volt Io = 0.55 Amps @ 10v Rm = 0.236 Ohms 10 Amps 110 W
 
Stator Outside Diameter Body Length Total Shaft Length Shaft Diameter Motor Weight
9-Slot 21.0 mm,  0.827 in. 19.5 mm,  0.768 in. 29.5 mm,  1.161 in. 2.00 mm,  0.079 in. 21.2 gm,   0.75 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 0.433 A 0.497 A 0.546 A 0.596 A 1796 RPM/Volt @ 10v 0.1531 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 4.92 36.4 10,571 46.0 194 6.84 5.32
APC 5.25x4.75-E 2 7.4 4.64 34.3 10,775 48.5 162 5.71 4.72
APC 5.25x6.25-E 2 7.4 5.99 44.3 9,970 59.0 147 5.19 3.32
APC 5.5x4.5-E 2 7.4 4.80 35.5 10,675 45.5 173 6.11 4.88
APC 6x4-E 2 7.4 5.23 38.7 10,415 39.5 211 7.43 5.44
APC 6x4.3-E 2 7.4 6.70 49.6 9,556 38.9 276 9.72 5.56
APC 6x4.5-E 2 7.4 6.61 48.9 9,628 41.0 279 9.85 5.71
APC 6x5.5-E 2 7.4 6.57 48.6 9,588 49.9 199 7.03 4.10
APC 6x6-E 2 7.4 6.78 50.1 9,474 53.8 218 7.69 4.35
APC 7x4-E 2 7.4 7.34 54.3 9,148 34.7 324 11.43 5.96
APC 7x4-SF 2 7.4 7.39 54.7 9,110 34.5 316 11.16 5.78
APC 7x5-E 2 7.4 8.45 62.5 8,400 39.8 299 10.56 4.79
APC 7x5-SF 2 7.4 8.26 61.1 8,542 40.4 313 11.05 5.13
APC 7x6-E 2 7.4 8.92 66.0 8,094 46.0 305 10.75 4.62
APC 7x6-SF 2 7.4 9.16 67.7 7,896 44.9 289 10.20 4.27
APC 8x3.8-SF 2 7.4 9.52 70.4 7,569 27.2 384 13.56 5.46
APC 8x4.7-SF 2 7.4 10.04 74.3 7,134 31.8 383 13.51 5.16
HQ 5x4.5-BN 2 7.4 4.86 35.9 10,643 45.4 207 7.29 5.75
HQ 6x4.5-BN 2 7.4 7.31 54.1 9,154 39.0 284 10.01 5.25
HQ 6x4.5-C 2 7.4 5.73 42.4 10,123 43.1 259 9.15 6.12
HQ 7x4.5-C 2 7.4 8.18 60.5 8,593 36.6 332 11.72 5.49
 
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 4.1x4.1-E 3 11.1 4.64 51.5 17,044 66.2 163 5.76 3.17
APC 4.5x4.1-E 3 11.1 5.39 59.9 16,560 64.3 216 7.62 3.61
APC 4.7x4.25-E 3 11.1 6.26 69.5 15,977 64.3 226 7.96 3.25
APC 4.75x4.75-E 3 11.1 6.81 75.6 15,595 70.1 219 7.74 2.90
APC 4.75x5.5-E 3 11.1 7.52 83.5 15,071 78.5 200 7.06 2.40
APC 5x4.3-E 3 11.1 8.26 91.7 14,536 59.2 345 12.17 3.76
APC 5x4.5-E 3 11.1 8.39 93.1 14,419 61.4 338 11.94 3.63
APC 5x4.6-E 3 11.1 8.48 94.2 14,364 62.6 361 12.72 3.83
APC 5x5-E 3 11.1 7.62 84.6 14,981 70.9 222 7.82 2.62
APC 5.5x4.5-E 3 11.1 8.42 93.5 14,409 61.4 312 11.00 3.34
APC 6x4-E 3 11.1 9.02 100.1 13,961 52.9 391 13.79 3.91
APC 6x5.5-E 3 11.1 11.22 124.6 12,925 67.3 362 12.75 2.90
HQ 5x3-C 3 11.1 3.89 43.2 17,551 49.9 247 8.72 5.72
HQ 5x4-C 3 11.1 5.54 61.5 16,445 62.3 312 10.99 5.06
HQ 5x4.5-BN 3 11.1 8.42 93.5 14,425 61.5 374 13.19 4.00
HQ 5x4.5-C 3 11.1 5.69 63.2 16,375 69.8 312 10.99 4.93
HQ 6x3-C 3 11.1 5.52 61.3 16,460 46.8 340 12.00 5.55
HQ 6x4.5-C 3 11.1 9.57 106.2 13,502 57.5 459 16.20 4.33
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.