6 • TR A X X AS
Gearing
One of the more significant advantages to your model’s transmission
is the extremely wide range of available gear ratios. Changing the
gearing allows you to fine tune the speed of the model and control
the temperatures of the battery pack and motor. Use a lower gear
ratio (numerically larger) to reduce current draw and temperatures.
Use a higher gear (numerically lower) to increase top speed. Use the
following formula to calculate the overall ratio for combinations not
listed on the gear chart:
When using higher gear ratios, it is important to monitor the
temperatures of the battery and motor. If the battery is extremely
hot, and/or the motor is too hot to touch, your model is probably
over-geared and drawing too much current. This temperature
test assumes that the model is close to factory stock weight and
operates freely with no excessive friction, dragging, or binding, and
the battery is fully charged and in good condition.
Note
: Check and
adjust gear mesh if a spur and/or pinion gear is changed.
This model is equipped with a Velineon 3500 motor. The gear
combination that comes stock on each model provides good overall
acceleration and top speed. If you want more top speed install the
included optional large pinion gear (more teeth).
The included
optional large pinion gear is intended for high-speed running on
hard surfaces, and this gearing is not recommended for off-road or
repetitive starting and stopping.
LiPo Batteries
LiPo batteries are intended only for the most advanced users that are
educated on the risks associated with LiPo battery use. It is critical to
follow all instructions supplied by the battery manufacturer and the
charger manufacturer for proper charging, use, and storage of LiPo
batteries. Make sure you understand how to use your LiPo batteries.
See
Safety Precautions
and warnings on page 4 for more information.
Advanced VXL-3s Electronic Speed Control Setup
The VXL-3s electronic speed control is capable of controlling
brushed, brushless, and sensored brushless motors. The VXL-3s auto-
detects the motor type and has numerous built-in safeguards to
prevent damage from miswiring or damaged wiring.
Sensorless brushless motors
Sensorless motors are the easiest and most reliable brushless motor
type. The VXL-3s is optimized to deliver the smoothest possible
sensorless motor performance. The Velineon 3500 is a sensorless
brushless motor (see sidebar for specs). The wiring (phase alignment)
of the motor determines its direction of rotation. Refer to the wiring
diagram on page 11.
Sensored brushless motors
The VXL-3s is fully compatible with sensored brushless motors.
Sensor motors use an additional sensor installed in the motor
to communicate rotor position to the speed control. The VXL-3s
features a covered auxiliary port that accepts aftermarket motor
sensors on the front face of the unit.
# Spur Gear Teeth
x 2.72 = Final Gear Ratio
# Pinion Gear Teeth
Gearing Compatibility Chart:
The chart below shows recommended
gear combination ranges when using a
NiMH battery pack to power your model.
In the red range, use a battery that has a
continuous rating of at least 70A.
Use NiMH batteries with:
Advanced Tuning Adjustments
All Models
Only Bandit VXL and Rustler VXL
Only Bandit VXL
Do Not Use NiMH (battery must have
a continuous rating of at least 70A.
Consult with your hobby dealer or
battery manufacturer.)
Battery
Nominal Voltage
mAh
Skill Level
6-Cell NiMH
7.2V
3000+ mAh
8.4V
4000+ mAh
8.4V
3S 20C LiPo
11.1V
4000+ mAh
3S 20C LiPo
11.1V
8000+ mAh
Battery
Nominal Voltage
mAh
Skill Level
6-Cell NiMH
7.2V
3000+ mAh
4000+ mAh
3S 20C LiPo
11.1V
4000+ mAh
3S 20C LiPo
11.1V
8000+ mAh
35+mph
45+mph
70mph & Beyond
35+mph
45+mph
70mph & Beyond
35+mph
45+mph
70mph & Beyond
35+mph
45+mph
65+mph
65+mph
65+mph
65+mph
70mph & Beyond
Sp
eed
Sp
eed
G
ear
ing
G
ear
ing
Bandit VXL
Bandit VXL
Stampede VXL
Stampede VXL
Rustler VXL
Rustler VXL
Bandit VXL
Bandit VXL
Stampede VXL
Stampede VXL
Rustler VXL
Rustler VXL
30+mph
40+mph
60+mph
65mph & Beyond
30+mph
40+mph
60+mph
65mph & Beyond
7-Cell NiMH
7-Cell NiMH
25/83
25/83
28/83
28/
83
(Included)
31/76
31/76
(Sold Separately)
31/76
31/76
(Sold Separately)
19/86
19/86
25/86
25/
86
(Included)
26/86
26/
86
(Sold Separately)
30/83
30/83
(Sold Separately)
26/76
26/76
28/76
28/
76
(Included)
33/76
33/76
(Sold Separately)
33/76
33/76
(Sold Separately)
(pinion/spur)
Spur Gear
P
inion G
ear
76
83
86
90
12
-
-
19.50
20.40
13
-
-
18.01
18.82
14
-
-
16.70
17.49
15
-
15.04
15.58
16.32
16
-
14.12
14.63
15.31
17
-
13.27
13.76
14.39
18
-
12.54
13.00
13.60
19
-
11.89
12.32
12.89
20
-
11.28
11.69
12.24
21
-
10.75
11.14
11.66
22
9.38
10.25
10.63
11.12
23
8.97
9.82
10.17
10.63
24
8.62
9.41
9.74
10.20
25
8.27
9.03
9.36
9.79
26
7.94
8.67
9.00
-
27
7.64
8.35
8.67
-
28
7.37
8.05
8.35
-
29
7.12
7.78
8.08
-
30
6.88
7.53
-
-
31
6.66
7.29
-
-
32
6.47
7.04
-
-
33
6.26
-
-
-
34
6.09
-
-
-
35
5.90
-
-
-
Thick black border indicates stock settings.
