FUTABA 16SZ Instruction Manual page 35

number of servos used.
S.BUS Glider usage example
HUB×4 ( Optional )
S.BUS Aerobatic plane usage example
＜ Before Use ＞
36
Receiver: R7008SB
Servo: S3174SV×9 ( Optional )
Throttle servo: BLS173SV ( Optional )
Battery: FR2F1800 ( Optional )
Switch
Receiver: R7008SB
Aileron servo: BLS174SV×2 ( Optional )
HUB×3 ( Optional )
Rudder Servo: BLS175SV×1 ( Optional )
Elevator servo: BLS173SV×2 ( Optional )