Tempest 1704-2600 Performance Test Data
Magnets Motor Wind Motor Kv No-Load Current Motor Resistance I Max P Max (3S)
12-Pole 12-Turn Delta 2600 RPM/Volt Io = 0.54 Amps @ 10v Rm = 0.239 Ohms 9.0 Amps 100 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 0.391 A 0.445 A 0.539 A 0.595 A 2666 RPM/Volt @ 10v 0.2387 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 4.5x4.1-E 2 7.4 5.25 38.8 14,034 54.5 156 5.49 4.00
APC 4.7x4.25-E 2 7.4 5.98 44.2 13,286 53.5 156 5.49 3.52
APC 4.75x4.75-E 2 7.4 6.41 47.4 12,841 57.8 152 5.36 3.20
APC 4.75x5.5-E 2 7.4 7.41 54.8 12,164 63.4 131 4.61 2.39
APC 5x4.3-E 2 7.4 7.54 55.8 11,548 47.0 217 7.65 3.89
APC 5x4.5-E 2 7.4 7.67 56.7 11,420 48.7 208 7.34 3.67
APC 5x4.6-E 2 7.4 7.75 57.3 11,312 49.3 224 7.91 3.91
APC 5x5-E 2 7.4 7.07 52.3 12,075 57.2 144 5.09 2.76
APC 5.25x4.75-E 2 7.4 7.40 54.8 11,644 52.4 194 6.84 3.54
APC 5.25x6.25-E 2 7.4 8.65 64.0 10,146 60.0 150 5.30 2.35
APC 5.5x4.5-E 2 7.4 7.52 55.6 11,511 49.1 198 6.98 3.56
APC 6x4-E 2 7.4 8.00 59.2 10,948 41.5 232 8.19 3.92
APC 6x4.3-E 2 7.4 9.92 73.4 9,763 39.8 292 10.31 3.98
APC 6x5.5-E 2 7.4 9.93 73.5 9,916 51.6 213 7.50 2.89
HQ 4x4-C 2 7.4 4.70 34.8 14,614 55.4 161 5.66 4.62
HQ 4x4.5-BN 2 7.4 5.70 42.2 13,593 57.9 177 6.24 4.20
HQ 4x4.5-C 2 7.4 3.14 23.2 16,200 69.0 122 4.30 5.25
HQ 5x3-C 2 7.4 4.06 30.1 15,260 43.4 191 6.74 6.36
HQ 5x4-C 2 7.4 5.48 40.6 13,780 52.2 221 7.81 5.46
HQ 5x4.5-BN 2 7.4 7.57 56.0 11,394 48.6 234 8.24 4.17
HQ 5x4.5-C 2 7.4 5.60 41.4 13,661 58.2 217 7.65 5.23
HQ 6x3-C 2 7.4 5.53 40.9 13,750 39.1 237 8.35 5.79
HQ 6x4.5-C 2 7.4 8.80 65.1 10,783 46.0 291 10.25 4.46
 
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 4.5x4.1-E 3 11.1 8.73 96.9 18,375 71.3 272 9.58 2.80
APC 4.7x4.25-E 3 11.1 9.86 109.5 16,710 67.3 250 8.82 2.28
HQ 4x4-C 3 11.1 7.71 85.6 19,691 74.6 282 9.96 3.30
HQ 4x4.5-BN 3 11.1 9.25 102.7 17,548 74.8 296 10.45 2.89
HQ 4x4.5-C 3 11.1 5.54 61.5 22,320 95.1 233 8.20 3.78
HQ 5x3-C 3 11.1 6.94 77.0 20,646 58.7 345 12.18 4.48
HQ 5x4-C 3 11.1 8.92 99.0 17,932 67.9 368 12.98 3.72
HQ 5x4.5-C 3 11.1 9.16 101.7 17,555 74.8 361 12.72 3.55
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.