12mm x 30mm Brushless
Motor
IPS Comparison Test Results
Setup:
Tests performed using
an IPS S1 Gearbox (4.14:1 Ratio) and
an APC-E 8x4 Propeller.
Results:
Motor
Voltage: 7.2V
Medusa
Research, Inc.
Brand
X Brushless
Motor
Current
3.58
Amps
2.87
Amps
Motor
Input Power
25.78
Watts
20.66
Watts
Prop
RPM
6130
RPM
5410
RPM
Thrust
8.11
oz
6.35
oz
Prop
Power
21
Watts
14
Watts
Efficiency
81.3%
67.7%
Motor
Voltage: 8.6V
Medusa
Research, Inc.
Brand
X Brushless
Motor
Current
4.66
Amps
3.70
Amps
Motor
Input Power
40.07
Watts
31.82
Watts
Prop
RPM
6840
RPM
6140
RPM
Thrust
10.83
oz
8.25
oz
Prop
Power
32.5
Watts
21.5
Watts
Efficiency
81.1%
67.6%
Prop
power and efficiency are calculated, all other
data measured
What this data indicates:
This data shows that with
identical gearing, the Brand X motor needs
6W more power than the Medusa Research
motor to produce 8oz of thrust. In other words,
the Brand X motor is 13.6% less efficient
when producing 8oz of thrust.
What
this means:
For this example, the
gear ratios were adjusted to keep equal thrust
with the same motor voltage. If you used a
1200mAHr pack supplying 7.2V under load, the
Medusa Research motor would run for 4+
minutes longer than the Brand X motor
when both are geared for 8oz of thrust.
6100
RPM
