Futaba 8SGAP User Manual download pdf (Page 19)

•BASIC LINKAGES AND INSTALLATION

The FP-8SGAP has a servo reversing switch and ATV (Adjustable Travel Volume) for

each channel. Mount the servos without regard to their direction. Select and link servo

horns somewhat larger than those specified by the model manufacturer.

• Install the servos securely. Tighten the mounting

screws until the rubber grommets are slightly

compressed. Note: If the screws are too tight,

the vibration dampening effect of the grommets

will be lost.

• Use extension cords as needed.

• It is suggested that a separate servo be used on

each aileron as this will allow use of the versatile

mixing and differential functions built into the

transmitter. Retractable landing gear can be

operated

with

single

servo

save

weight

with

two

servos

simplify the mechanical link-

age as desired.

• Connect the pushrod to each servo horn, then

check to see if the direction of travel in relation

to stick movement is correct. If the direction of

travel is reversed, use the servo reversing switches

to correct.

• When installing the switch harness, cut a retangu-

lar hole slightly larger that the full stroke of the

ON/OFF switch and install the switch so that it

operates smoothly. It is best to install the switch

inside the fuselage and attach a piece of wire to

the switch so that it can be operated from out-

side the aircraft. Locate the switch where it will

not be exposed to engine oil, dust, etc.

•Wrap the receiver in soft foam rubber. Water-

and dustproof the receiver by placing it in a

plastic bag and tying the mouth of the bag with

a rubber band. Do the same with the airborne

battery pack. Caution: The foam rubber should

be loosely wrapped and not compressed. This

will provide maximum protection from vibra-

tion.

• Use the rubber bands wrapped around the re-

ceiver to hold the servo and switch leads.

• Even though the receiver antenna may appear to

be too long, do not shorten it or fold it back.

• Be alert for possible electrical noise.

This system has noise rejection circuits, however

noiseless parts are recommended.

•Operate

each

servo

its full

throw

and check

for slop or binding in the linkage. Unreasonable

force applied to the servo horns can damage the

servo or horns and will greatly shorten battery

life. Adjust linkages and servo horns so that the

servos move smoothly even when the trim lever

and stick are operated simultaneously in the

same direction.

• After installation is complete, recheck each part,

then perform a range check by collapsing the

transmitter antenna and extending the receiver

antenna to its full length. Operate the transmit-

ter at a distance of 60 to 90 feet from the receiv-

er. The servos should operate normally at this

distance.

Normal 8 channel use (mixing and other functions not used).

Set the switches on the trimmer panel at the back

of the transmitter as shown below. The switches

are set as shown in Fig. 29. Connect the aileron

servo to CH1, elevator servo to CH2, throttle servo

to CH3, rudder servo to CH4, landing gear servo to

CH5, flap servo to CH6, spoiler servo to CH7, and

the pitch control servo to CH8.

Fig.

Set the DIFF

trimmer 1 5

to the INHB

(counterclock

wise).

DIFF trimmer 15 set to INHB Counterclockwise.

Note: Monitor Lamps (B), (C), and (D) do not

come on at this time. Check if the direction of

operation of each servo is correct under this state.

If the direction of operation of a servo is incorrect,

reverse the position of the corresponding servo

reversing switch [38] to [45]. Next, set the 2ND

ATV trimmers on aileron and elevator to the

desired deflection angles on the aircraft. The

deflection angle decreases when the 2ND ATV

trimmer is turned counterclockwise. Throttle con-

trol can be adjusted with the ATL trim lever 19

This completes the settings for basic 8 channel

use.

1 2 ... 14 15 16 17 18 19 20 21 22 23 24 ... 37 38

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Futaba 8SGAP User Manual Page 19

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