Black Horse Model BH172, Instruction Manual Book

Page: 22 / 41

Adjust the throttle input (transmitter throttle
stick), throttle trim movement and the
carburattor opening to the suitable position
and screw in the 4x4mm set screw.
Screw
Linkage stopper
4x4mm
2x10mm
2mm
Pushrod wire
1) Install one adjustable metal connector through
the third hole out from the center of one servo arm,
enlarge the hole in the servo arm using a 2mm drill
bit to accommodate the servo connector. Remove
the excess material from the arm.
After installing the adjustable metal connector
apply a small drop of thin C/A to the bottom nut. This
will prevent the connector from loosening during
flight.
2) Plug the throttle servo into the receiver and turn
on the radio system. Check to ensure that the
throttle servo output shaft is moving in the correct
direction. When the throttle stick is moved forward
from idle to full throttle, the throttle barrel should also
open and close using this motion. If not, reverse the
direction of the servo, using the transmitter.
PIPER PA -18 SUPER CUB Item code: BH172 I nstruction manual
3) Slide the adjustable metal connector / servo
arm assembly over the plain end of the pushrod
wire. Position the throttle stick and the throttle trim
at their lowest positions.
4) Manually push the carburator barrel fully
closed. Angle the arm back about 45 degree from
center and attach the servo arm onto the servo.
With the carburator barrel fully closed, tighte the
set screw in the adjustable metal connector.
5) Remove the excess throttle pushrod wire
using wire cutters and install the servo arm
retaining screw.
Fuselage top side
Throttle servo
22