Futaba FP-G153BB, FP-G153, FP-G133BB, FP-G133 User Manual

The FP-G153/G153BB/G133/G133BB is a single axis rate
gyro designed to stabilize aircraft. Like full size aircraft,
stabilisation is accomplished by detecting angular accelera­tion with the rate gyro. Detected motion information is fed
to the control amplifier, which then sends a counteraction
signal to the appropriate control surface.

•A very sensitive magnetic motion sensor with excellent
voltage characteristics, linear sensitivity, high speed
response is used. This results in superior neutral character­istics. Such characteristics make it ideal for use with the
rudder channel of a model helicopter or in the aileron/
elevator channel of a model aircraft.

•Large 2mm diameter gyro motor shaft for long life and

strength.

•The

highest

bearing. (G153BB/G133BB only)

quality

ball bearing

is

used

as

the motor

•The FP-G153/G153BB is for Futaba J, M, and SG
Series (1520 us neutral) digital proportional radio con­trol

sets.

•The FP-G133/FP-G133BB is for Futaba E, F, G, H. and
L Series digital proportional radio control sets.

•Voltage regulated gyro motor supply maintains constant
motor speed and allows consistent gyro performance. The
voltage regulator is effective only when used with an ex­ternal 6V. (five cell Nicad battery).

•Direction of correcting mix can be switched at the control
amplifier (internal reverse amp switch).

•Centering of the channel being stabilized can be adjusted
by a neutral trimmer built into the control amplifier.

•The gyro can be bypassed without affecting normal oper­ation by

•Gyro output ("sensitivity") can be switched to one of two

preset outputs at the transmitter (use the retract switch if
possible, or any avail, channels).

turning

the gyro power switch

"off".

OUTPUT ADJUSTMENT

•When using the switchable gyro output sensitivity feature,
connect connector (B) to the retract channel if possible.
However, a proportional channel can be used. The output
sensitivity switching point will then be at the center or
neutral area.

*When the transmitter landing gear switch is pulled for-

ward (or down), the output sensitivity can be adjusted
from 0 to 100% with trimmer (1).

*When the transmitter landing gear switch is pushed

back (or up), the output sensitivity can be adjusted
from 0 to
mers (1) and (2) do not interfere with each other, and
can be adjusted independently.

•When the output is fixed or there is no spare channel (as
with 4 channel set), do not connect connector (B). In this
case, adjust the output with control box trimmers (1) and
(2). (Insulate the terminals with vinyl tape so they cannot
be touched.)

100%

with

trimmer

(2).

In this

case,

trim-

EXAMPLE

Adjustment when installed in a helicopter:
When using the switchable output sensitivity:

Set trimmer (1) to about the 80% of maximum output sen­sitivity position (100% is full clockwise) as a starting point.
Hover

with

the

wind

and readjust
hunting" does not occur. However, do not reduce output
sensitivity to a point where the nose will turn upwind when
"lifting off".
Set trimmer (2) to about the 60% position when a large
rudder travel is unnecessary, such as 540° stall turns, etc.

trimmer

Approx. 60%

(1)

so

that

Approx. 80%

"tail

*When trimmer (1) is 0, the output can be adjusted

from 0 to 50% with trimmer (2).

*When trimmer (1) is 100%, the output can be adjusted

from 50 to 100% with trimmer (2).

POWER SUPPLY

•When using the rate gyro with a separate power supply
(utilizing the motor voltage regulator), connect the five

cell Nicad battery pack (6V) to connector (C). Thereby,
maintaining constant motor speed and consistent gyro
performance. A four cell Nicad (4.8V) battery pack can­not be connected to connector (C).

•Whenever a four cell Nicad battery pack (4.8V) is used, it

must be as a common power supply for the receiver and
gyro. Connect the accessory jumper connector to con­nector (C), when using a 4.8 volt power supply.

•When the receiver and gyro use a common power supply,
rudder/servo power consumption and the power con-

sumed by the gyro, increases the total power consumption.
This decreases the number of permissible flights. The use
of a high capacity (4.8/1,000mA) Nicad battery is recom­mended. (The Futaba NR-4I (4.8V/1000mA) Nicad bat­tery pack can be purchased separately.)

(C) connector

Jumper connector

Control box

•Do not expose the rate gyro to shock and vibra­tion

•Do not disassemble or modify the rate gyro

When the inside of the gyro must be inspected, remove
the three screws on the side of the case and remove the
cover. Do not loosen the screws on the bottom of the
case. If these screws are loosened, the neutral position

may change at sensitivity or polarity switching.

•This gyro is not interchangeable with other
gyros or control amps.

When requesting repair after long use, accident, or

if any other trouble has occurred, describe the
problem in as much detail as possible. This will
allow us to isolate the trouble point quickly and
reduce the repair time.

FP-G133/G133BB

(C) connector

Connect the following to the (C) connector (control am­plifier BATT):

* Five cell Nicad battery pack (6V) Our optional NR-5PB

(6V/450mAH) Nicd battery pack, etc. is recommended.

* Jumper connector, when the gyro and receiver use a com-

mon power supply

Jumper connector