Futaba GY701 User Manual

GYRO QUICK START

1M23N23902

INTRODUCTION

The Futaba® GY701 is a heading hold AVCS gyro and head speed governor in one box. Its cutting-edge MEMS (Micro Electro Mechanical System) sensor design, ultra high-speed processing and advanced PID control algorithm put it a quantum leap ahead of all other heading hold gyros in size, weight and performance. The GY701 has been optimized for model helicopter competition.

Please read through this guide completely before ﬂ ying the GY701. You must also read the instruction manual in its entirety (including all of the precautions and safety warnings). The goal of this quick start guide is to get you up and ﬂ ying with the GY701 in a minimum number of steps. It is also recommended that you ﬁ nd the optimum settings using the gyro mode only. Once you have found the optimum settings and are satisﬁ ed with the ﬂ ight performance, please refer to the GY701 instruction manual to begin governor setup. This quick start guide also assumes that you are familiar with your transmitter and programming functions.

The information within this manual will provide a heading hold 3D setup that is mild overall. If you feel any changes are necessary, please refer to the GY701 instruction manual.

If you want to setup Normal Mode only (non heading hold), then please refer to the GY701 Instruction Manual.

MODEL PREPARATION

Prepare your model by installing the servos, receiver and power system. Leave the servo arm off of the tail rotor servo and do not connect the tail rotor servo to the GY701 until you have completed the setup later in this guide. Once the correct tail rotor servo type has been selected, the servo can be connected to the control box.

GYRO SENSOR INSTALLATION

The gyro sensor should be mounted on a rigid platform, at least 6 in [152mm] away from a Nitro Engine. It is not necessary to mount the gyro near the main shaft of the helicopter, but it is very important that the mounting area chosen is rigid. Please refer to your helicopter manufacturer’s instructions for recommended mounting locations.

Installing the gyro sensor

When mounting the gyro in a larger electric or .50 through .91 size nitro helicopter, we recommend using one 2mm Mounting Pad.

Gyro Sensor

2mm Mounting Pad

Gyro Mount

TROUBLESHOOTING

If you experience erratic gyro operation (drifting, not holding well or inconsistent pirouette rate), please follow the troubleshooting tips listed below.

1. Always verify that your model’s tail rotor control and drive system are working correctly.

GYRO SENSOR INSTALLATION

2. Electromagnetic interference could affect the gyro or tail rotor servo. Mount the gyro in a different location, away from the electronic speed control, servos and drive motor.

3. The trouble may be caused by vibration. Verify that your helicopter’s components are balanced. If problems persist, try mounting the gyro in a different location.

TAIL ROTOR SERVO INSTALLATION & SETUP

Follow your transmitter instructions and program the transmitter as follows:

❑ Enable the gyro function within the transmitter . ❑ Set the gyro mode to AVCS (GY) within the

transmitter.

❑ Set the remote gyro gain to 70% AVCS in the

transmitter for the Normal and Hold ﬂ ight conditions. Use 60% AVCS for all idle up conditions. See “Setting The Gain” section in the instruction manual for more details.

❑ Set the Tail Rotor ATV/EPA to 100% for both

left and right.

❑ Set D/R to 75% for both left and right. This

will reduce the maximum pirouette rate. Make adjustments to these values once the initial test ﬂ ight has been completed.

❑ It is recommended that you run 30%

softening expo on the tail rotor channel within the transmitter.

WARNING

ｎ

the gyro until the servo type has been selected. Operating the servo using the incorrect setting may damage the GY701 or the servo.

Do not connect the tail rotor servo to

ｌ

CONTROL BOX INSTALLATION

(1) Gyro:

s Connect the gyro sensor.

2 3

(2) Rin/SB:

s S.BUS receiver: Connect to the S.BUS out-

put of the receiver.

s Other than S.BUS receiver: Connect to the

rudder channel output.

Receiver

(3) Gain:

s Connect to the gyro gain channel output.

Gyro

Find a suitable location for the GY701 control box and mount it using double sided tape. Connect the gyro sensor to the [Gyro Rsen] connector on the control box and ensure the clip is ﬁ rmly engaged. Connect the supplied extensions to the GY701 connecter. Route the wires through the helicopter mechanics and connect them to the appropriate receiver channels. If you are using a standard receiver, then the only two connections needed are Receiver Tail Rotor Channel ➞ GY701 [Rin] connection and Receiver Gain Channel ➞ GY701 [Gain] connection. To determine the appropriate receiver channels, please check your transmitter’s instruction manual.

If using a Futaba S.Bus receiver, then only one extension is needed between the S.Bus Receiver connection and the GY701 [SB] connection. If any other information is needed please see the “S.Bus Basic Setting” section of the GY701 Instruction Manual.

Gyro

*Insert the sensor

connector until it is

firmly locked.

Gyro

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