Futaba 8SGAP User Manual download pdf (Page 30)

NOTE:

When lowering lever 8 , be careful that the pitch

does not go negative. This is adjusted during flight.

For example, flight is affected by the temperature,

air pressure, wind, and other conditions. Use this

lever adjusting the speed, pull, etc. to your liking.

Also select the engine tone quality by adjusting

the propeller pitch. Make quiet flights by fine ad-

justing the propeller pitch.

Next, adjust the throttle. First, set switch II to

the OFF position. Adjust the engine idling speed

to 2,200~2,500 rpm with the throttle trim lever

19 . Then set switch II to the ON position and

set the throttle lever to the maximum slow (zero

pitch) position. Adjust idle up lever 9 for an

engine speed of 3000 ~ 4000 rpm. Lever 9 is

inoperative when switch II is in the OFF posi-

tion. Use the variable pitch propeller as an air

brake during dives.

Pitch zero does not have an air braking affect. If

the engine is running at a speed of 3000 ~ 4000

rpm, the air braking effect will not appear if the

propeller diameter is too small.

Adjust the throttle so the pitch is positive and the

engine idles when switch II is set to the OFF

position. Since lever 8 is also operative in this

state, optimum pitch adjustment is possible.

Idle up lever

Operation when switch

NOTES:

• The pitch always becomes maximum when the

throttle switch is set to HIGH.

•The

speed

cannot

increased

with

the idle up

lever 9 when the propeller pitch is zero.

• Since the air braking effect is higher than normal

when landing at zero propeller pitch, be careful

until you become familiar with the setting.

• Best result is often obtained by making the

tuned pipe longer.

Pitch 8-9

Pitch control

high side trimmer

Pitch 11

(maximum)

VARIABLE PITCH PROPELLER AND ENGINE

POWER MATCHING IS ESSENTIAL FOR MAXIMUM PERFORMANCE

the throttle stick is operated quickly during

flight, the engine will make an abnormal sound

(sputter). If the engine sound remains unnatural,

the pitch control or throttle servo operation tim-

ing can be delayed.

When the throttle lever is suddenly moved from a

high speed to a low speed, the throttle operates

before the propeller pitch changes to zero. If the

throttle lever is moved from HIGH to SLOW, the

pitch will change before the throttle operates.

Set the throttle delay time with trimmer [4] and

the pitch delay time with trimmer [5] . This

provides the same feeling as fixed propeller aircraft

andallows natural flight.

Fig.

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Futaba 8SGAP User Manual Page 30

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