Flight Preparation; Control Throws - Seagull Models Extra 300S Assembly Manual

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Assembly manual (20 pages)

Table Of Contents

Table of Contents

EXTRA 300S

BALANCING

! ! ! ! ! 1) It is critical that your airplane be bal-

anced correctly. Improper balance will cause

your plane to lose control and crash. The cen-

ter of gravity is located 4cm back from the lead-

ing edge of the wing, measured at the wing

tip.

! ! ! ! ! 2) If the nose of the plane falls, the plane

is nose heavy. To correct this first move the

battery pack further back in the fuselage. If

this is not possible or does not correct it, stick

small amounts of lead weight on the fuselage

sides under the horizontal stabilizer. If the tail

of the plane falls, the plane is tail heavy. To

correct this, move the battery and receiver for-

ward or if this is not possible, stick weight onto

the firewall or use a brass heavy hub spinner

hub. When balanced correctly, the airplane

should sit level or slightly nose down when you

lift it up with your fingers.

Wing tip

CONTROL THROWS

! ! ! ! ! 1) We highly recommend setting up the

EXTRA 300S using the control throws listed

at right. We have listed control throws for both

initial test/sport flying and aerobatic flying.

! ! ! ! ! 2) Turn on the radio system, and with the

trim tabs on the transmitter in neutral, center

the control surfaces by making adjustments

to the clevises or adjustable servo connec-

tors. The servo arms should be centered also.

4cm

INSTRUCTION MANUAL

! ! ! ! ! 3) When the elevator, rudder and aileron

control surfaces are centered, use a ruler and

check the amount of the control throw in each

surface. The control throws should be

measured at the widest point of each sur-

face!

INITIAL FLYING/SPORT FLYING

Ailerons :

3/16" up 3/16" down

Elevator :

3/8" up 3/8" down

Rudder :

3/4 right 3/4 left

AEROBATIC FLYING

Ailerons :

3/8" up 3/8" down

Elevator :

7/8" up 7/8" down

Rudder :

1-1/4" right 1-1/4" left

Do not use the aerobatic settings for

initial test flying or sport flying.

! ! ! ! ! 4) By moving the position of the adjust-

able control horn out from the control surface,

you will decrease the amount of throw of that

control surface. Moving the adjustable con-

trol horn toward the control surface will in-

crease the amount of throw.