Futaba 4EXA User Manual
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33
GLOSSARY
GLOSSARY
It will be helpful to understand the following terms
before reading the rest of the manual. The terms are not in alphabetical
order, but are in a logical order that prepares the reader for understanding the next term.
Reversing (servo reversing) -
Reversing (servo reversing) - A function that allows the user to determine the direction of response of each servo. If, after
hooking up the servos, a control on the model responds in the wrong direction, the user may change the servo's direction so
the control responds correctly.
Throw -
Throw - When speaking of a control surface (such as an elevator or aileron), the throw is
the distance the surface moves. Control surface throw is usually measured at the trailing
edge of the surface and is expressed in inches or millimeters. The model in the diagram has
1/2" [13mm] of up elevator throw. Throw can also refer to the distance a servo arm (or
wheel) travels.
End point adjustment (E.P.A.) -
End point adjustment (E.P.A.) - Sets the overall, maximum distance the servo rotates in
either direction.
Exponential -
Exponential - Normally, servos respond proportionally to control stick input from the transmitter (e.g., if the stick is moved
halfway, the servo will move halfway). However, with
“
exponential,
”
the servo can be made to move more or less than initial
stick movement (less servo movement is more common). Exponentials are commonly used to
“
soften,
”
or decrease initial
servo travel for the ailerons, elevators and rudder. This way, initial control stick inputs from the pilot result in small servo
movement for a smoother flying airplane.
Mixing -
Mixing - Two (or more) servos can be made to operate together either by mechanically joining the wires (with a Y-connector)
or by electronically
“
joining
”
them through programming functions (WING mixing) in the transmitter. When servos are
electronically joined via programming, they are said to be
“
mixed.
”
Each servo
’
s end points can be independently set.
CONTENTS AND SPECIFICATIONS
CONTENTS AND SPECIFICATIONS
Transmitter: T4EX
Transmitter: T4EX
T4EX Transmitter with 4-model memory.
Transmitting on 29, 35, 36, 40, 41, or 72 MHz band.
Operating system: 2-stick, 4-channel system
Modulation: FM(Frequency modulation)
Power supply: 9.6V NT8S600B Ni-Cd battery or 12V alkaline battery
Current drain: 250mA
Receiver: R127DF, R136F, R124F, or R114F
Receiver: R127DF, R136F, R124F, or R114F
R127DF FM Dual conversion 7 channel receiver.
R136F FM 6 channel receiver.
R124F/R114F FM 4 channel micro receiver.
Receiving on 29, 35, 36, 40, 41, or 72 MHz band.
Intermediate frequencies: 455kHz (R127DF- 10.7MHz/455kHz)
Power requirement: 4.8V or 6V (R124F/R114F- 4.8V)
Current drain: 9.5mA @ 4.8V (R124F/R114F- 6mA @ 4.8V)
Size: R127DF- 1.39x2.52x0.82" (35.3x64.0x20.8mm)/
R136F- 1.31x1.98x0.71" (33.4x50.3x18.1mm)/
R124F- 1.31x0.64x0.62" (33.2x16.2x15.7mm)/
R136F- 0.86x1.25x0.53" (21.8x31.7x13.5mm)/
Weight: R127DF- 1.5oz (42.5g) / R136F- 0.98oz (27.8g) /
R124F- 0.30oz (8.5g) / R114F- 0.38oz (10.9g)
Servos: S3004, S3003, S3109M, or S3108
Servos: S3004, S3003, S3109M, or S3108
S3004 ball bearing/S3003 standard servo
S3109M/S3108 micro servo
With mounting hardware and servo arm assortment.
Control system: Pulse width control,1.52ms neutral
Power requirement: 4.8 or 6V from receiver (S3109M/S3108- 4.8V)
Output torque: S3004/S3003- 44.4oz-in [3.2kg-cm] @4.8V
S3109M- 6.25oz-in [0.45kg-cm] @4.8V
S3108- 16.7oz-in [1.2kg-cm] @4.8V
Operating speed: S3004/S3003- 0.23sec/60
°
@4.8V
S3109M- 0.14sec/60
°
@4.8V
S3108- 0.12sec/60
°
@4.8V
Size: S3004/S3003- 1.59x0.78x1.41" [40.4x19.8x36mm]
S3109M/S3108- 0.86x0.43x0.78" [21.8x11x19.8mm]
Weight: S3004- 1.3oz (37.2g) / S3003- 1.3oz (38.0g) /
S3109M- 0.22oz (6.3g) / S3108- 0.27oz (7.6g)
Other components:
Other components:
Switch harness
9"[200mm]aileron extension cord (to facilitate quick connecting and
disconnecting of aileron servo with removable wing)
Instruction manual
*Specifications and ratings are subject to change without notice