Scorpion M-4015-340 Motor Propeller Data
Magnets Motor Wind Motor Kv No-Load Current Motor Resistance I Max P Max (6S)
14-Pole 15-Turn Wye 340 RPM/Volt Io = 0.47 Amps @ 10v Rm = 0.108 Ohms 25 Amps 560 W
 
Stator Outside Diameter Body Length Total Shaft Length Shaft Diameter Motor Weight
12-Slot 48.8 mm,  1.921 in. 37.2 mm,  1.465 in. 41.5 mm,  1.634 in. 3.98 mm,  0.157 in. 194 gm,   6.84 oz
 
Test Data From Input 12.0 V 16.0 V 20.0V 24.0V Measured Kv value Measured Rm Value
Sample Motor Io Value 0.56 A 0.62 A 0.68 A 0.74 A 375 RPM/Volt 0. Ohms
 
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 16x5.5-MR 4 14.8 12.21 180.7 4,596 23.9 1573 55.49 8.71
APC 18x5.5-MR 4 14.8 15.77 233.4 4,329 22.5 1976 69.69 8.46
GEM 16x4.5-MRW 4 14.8 9.96 147.4 4,778 20.4 1288 45.44 8.74
RCT 14x5.5-CF 4 14.8 11.07 163.8 4,684 24.4 1229 43.34 7.50
RCT 15x5.5-CF 4 14.8 14.94 221.1 4,391 22.9 1539 54.28 6.96
RCT 16x5.5-CF 4 14.8 17.27 255.6 4,220 22.0 1730 61.01 6.77
RCT 17x5.5-CF 4 14.8 19.52 288.9 4,066 21.2 1905 67.19 6.59
RCT 18x5.5-CF 4 14.8 22.82 337.7 3,833 20.0 2150 75.84 6.37
 
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 14x5.5-MR 5 18.5 11.93 220.7 5,890 30.7 1671 58.94 7.57
APC 16x5.5-MR 5 18.5 17.32 320.4 5,450 28.4 2304 81.28 7.19
APC 18x5.5-MR 5 18.5 22.04 407.7 5,121 26.7 2773 97.83 6.80
GEM 14x4.5-MRW 5 18.5 10.09 186.7 6,045 25.8 1446 51.02 7.75
GEM 15x4.5-MRW 5 18.5 11.18 206.8 5,967 25.4 1589 56.05 7.68
GEM 16x4.5-MRW 5 18.5 14.10 260.9 5,709 24.3 1918 67.66 7.35
RCT 14x5.5-CF 5 18.5 15.85 293.2 5,570 29.0 1763 62.20 6.01
RCT 15x5.5-CF 5 18.5 21.76 402.6 5,143 26.8 2165 76.38 5.38
RCT 16x5.5-CF 5 18.5 24.19 447.5 4,904 25.5 2400 84.65 5.36
RCT 17x5.5-CF 5 18.5 26.99 499.3 4,702 24.5 2617 92.31 5.24
 
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 12x4.5-MR 6 22.2 9.79 217.3 7,342 31.3 1499 52.87 6.90
APC 14x5.5-MR 6 22.2 15.94 353.9 6,792 35.4 2271 80.12 6.42
APC 16x5.5-MR 6 22.2 22.87 507.7 6,238 32.5 3060 107.93 6.03
GEM 13x4.5-MRW 6 22.2 11.36 252.2 7,194 30.7 1699 59.91 6.73
GEM 14x4.5-MRW 6 22.2 13.34 296.1 7,012 29.9 2005 70.71 6.77
GEM 15x4.5-MRW 6 22.2 14.72 326.8 6,896 29.4 2139 75.43 6.54
GEM 16x4.5-MRW 6 22.2 18.57 412.3 6,575 28.0 2588 91.30 6.28
RCT 12x5.5-CF 6 22.2 12.19 270.6 7,115 37.1 1579 55.70 5.83
RCT 13x5.5-CF 6 22.2 16.01 355.4 6,785 35.3 1974 69.63 5.55
RCT 14x5.5-CF 6 22.2 21.34 473.7 6,353 33.1 2361 83.29 4.98
RCT 15x5.5-CF 6 22.2 28.71 637.4 5,757 30.0 2794 98.55 4.38
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
512 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.