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Geared inrunners can have superior power and efficeincy over outrunners at very favorable weights. Additionally because you can change the gear ratio, many combinations can be acheived making one motor useful over a much wider range of models. Inrunners waste less energy in the form of heat because the windings (the copper) are much shorter thereby getting more of your batteries stored energy to the prop. Designed for low-weight, high efficiency and durability. The HG2025 series gear motors for models ranging generally from 14oz. to 40oz. Depending on gear ratio, battery and prop, this motor can replace anything from a 280 to a 480/600 type motor.
Specifications:
Weight
Ratios
Amps
Shaft
Max Motor RPM
KV
Resistance
No Load Current
82g(2.9oz)
4.43,5.33,6.6:1
10-20
3mm
60k
4200
.075Rm
.75A
Setup and Performance Chart
# Cells
Ratio
Prop
Amps/Watts In
RPM
Thrust oz.
Pitch Speed MPH
Climb FPM @ 14oz.
Climb FPM @ 22oz.
Climb FPM @ 30oz.
2
4.43:1
11-7
14.9/111
5,430
21
35
2183
1343
951
2
4.43:1
12-8
19.6/146
4,930
26
36
2800
1738
1243
3
4.43:1
10-6
19.6/219
8,220
35
45
4353
2733
1977
3
4.43:1
11-4.7
21.2/110
8,030
37
34
4177
2616
1887
3
5.33:1
11-7
19.4/217
6,850
36
44
4546
2856
2067
3
5.33:1
12-6
21.8/244
6,610
40
36
4730
2969
2148
3
6.6:1
12-8
17.6/197
4360
35
42
4360
2736
1979
3
6.6:1
13-6.5
18.8/210
5,580
38
33
4327
2711
1957
Estimates based on manufacturers provided constants using E-Calc. High Quality 1300mah used as trial cell in calculations. Actual performance may vary depending on components used, accuracy of data as provided by manufacturer, quality of ESC, weather and many other variables.
 "Himax 2025-4200 Brushless Power Geared Inrunner")