27
VMAR CHALLENGER 40ARF TRAINER
TM
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7.2.1
Secure the engine throttle arm at roughly half
throttle. Look into the throat of the engine carburettor as
you rotate the throttle arm and select a position where the
throttle opening is about half what it is when fully open.
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7.2.2
Locate the throttle control rod that you connected
earlier to the throttle control arm and ran back through the
firewall and the fuel tank compartment and into the radio
compartment.
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7.2.3
Using side
cutters, cut the rod so
that it extends back from
the bulkhead between the
tank and radio compart-
ment to within about 12
mm (1/2 in.) of the
forward edge of the servo
tray.
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7.2.4
Locate the two collars [COL] that you removed
from the throttle control rod assembly earlier.
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7.2.5
Loosen the set screws in the collars and slide
both collars onto the throttle control rod that you have cut
to length. Loosely set the screws.
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7.2.6
Locate the second throttle control rod with a
clevis on one end. Attach the clevis of the second throttle
control rod to the throttle servo arm and rotate the throttle
arm forward. Use side cutters to trim the length of the
second rod so that it parallels and overlaps the first
throttle control rod by about 50 mm (2 in.)
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7.3.2
Confirm & ensure that all of the following are true:
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The elevator is taped at its neutral position and it
is connected to the elevator control rod and clevis.
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The rudder is taped at its neutral position and it is
connected to the rudder control rod and clevis.
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The engine throttle arm is secured at approxi-
mately mid throttle
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The transmitter trims for the throttle, rudder and
elevator are set to a mid position.
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The transmitter throttle stick is at half power.
THROTTLE
CONTROL
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STEP 7.2 - CONNECTING THE
THROTTLE CONTROL RODS TO THE
THROTTLE SERVO.
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7.2.7
With the set screws facing upwards, loosen the
set screws and slide the collars over both throttle control
rods and tighten the two collars securely into place so
that the two rods are joined firmly together. Ensure the collar
set screws are facing upwards.
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7.3.1
If you have not already done so, use masking
tape to tape the rudder and elevator. Tape the rudder at
it's neutral position... not left, not right. Tape the elevator
at it's neutral position... not up, not down.
Attach the clevis on
the elevator control
rod to the elevator
control horn. Ensure
that at least 6mm (1/4
in.) of clevis shank
remains on the
threaded portion of
the rod.
Attach the clevis on
the rudder control rod
to the rudder control
horn. Ensure that at
least 6mm (1/4 in.) of
clevis shank remains
on the threaded
portion of the rod.
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STEP 7.3 - CONNECTING THE RUD-
DER & ELEVATOR CONTROL RODS.
CLEVIS ATTACHED
TO SERVO ARM
TRIM
LENGTH
OF ROD
COLLARS
FRONT
CLEVIS ATTACHED
TO SERVO ARM
COLLARS
FRONT
CLEVIS
CLEVIS
CONTROL
HORN
CONTROL
HORN
RODS
OVERLAP