Rapid Throttle Acceleration
THR-ACCEL
Levels
LV2, LV3
Only
DEFINITION:
Due to the shape of some nitro engine linkages, throttle servo
movement near neutral results in very little movement of the pushrod. Throttle
acceleration simply jumps the servo from neutral to a portion of the total
available throw whenever the trigger is moved away from center. It does NOT
change the speed of the servo; the servo will jump to the input position at its
maximum possible speed. Unlike exponential, which adjusts the whole throttle
movement into a curve, throttle acceleration simply “jumps” away from neutral
and then leaves the remaining response linear. Accelerate is a pre-programmed
VTR throttle exponential (see p. 20).
AVAILABLE FOR:
Throttle and braking separately.
ADJUSTABILITY:
0-100%.
•
At 100% the throttle servo moves immediately to
approximately 40% of the total EPA.
•
At 100% the brake servo moves immediately to full brake.
•
Each setting may be assigned to a dial or trim for on-the-
track adjustability. (See
FUNC-DIAL
, pp. 34-35.)
INTERACTIONS:
•
EPA will affect how far the servo moves in the jump. Changes in EPA may require adjusting throttle acceleration.
•
Brake mixing works with acceleration as if only one brake servo were used. No second setup is required.
DESIRED END RESULT:
Model responds to throttle/brake immediately, similar to an electric car.
CAUTION:
High brake settings will result in locked brakes. Adjust throttle acceleration only enough to pick up the
slack in the linkage; then, utilize ABS to fine tune braking performance.
26
GOAL:
Remove throttle and braking “lag” due to
linkage in a 4WD nitro powered car, while
using
LV2
. (If using
LV3
, select
TH-ACCEL
from Menu 1.) (If using
LV1
, first change
the level selection. See p. 12.)
Where next:
STEPS:
Open and select menu 1.
Select
TH-ACCEL
.
With receiver on, adjust forward until the
linkage opens the carb with the slightest
throttle input.
With receiver on, adjust brake until the
linkage applies brake with the slightest
brake input.
Close function and menu.
INPUTS:
6 times
as needed.
as needed.
NOTE: All of these functions interact with the throttle servo as well and are all inter-
related. Adjusting any one will affect the performance of the others.
Adjust the throttle servo’s overall speed (
TH-SPEED
): See p. 23.
Adjust throttle exponential (
TH-EXP
): See p. 20.
Setup ABS braking (
ABS
): See p. 24.
Set up smooth acceleration off of the start or engine cut (
AT-START
): See p. 28.
Set up a high idle for starting/racing, and keep a normal idle to keep the car sitting still
on start line (
IDLE-UP
): See p. 27.
Adjust brake mixing for separate front/rear brakes (
BRAKE-MIX
) (
LV3
): See p. 42.
