FUTABA gy701 Instruction Manual
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FUTABA gy701 Instruction Manual

FUTABA gy701 Instruction Manual

Gyro & governor
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I
M
NSTRUCTION
ANUAL
1M23N23902

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  • Page 1 NSTRUCTION ANUAL 1M23N23902...

  • Page 2: Table Of Contents

    • Recommended Servos ------------------- 15 www.futaba-rc.com/faq • Replacement and Optional Items ------- 15 • Connecting the GY701 to your Receiver 16 • LED Indicator Description -------------- 19 • Mechanics Preparation------------------- 20 RECAUTIONS • Opening Screen --------------------------- 22 •...

  • Page 3: Precautions

     Always ensure that there is some slack in the tempting to fly the model. gyro cables to help maximize performance. Al-  Only use the GY701 with a 2.4GHz system ways use the supplied gyro mounting pads to at- such as the Futaba FASST system, or a PCM tach the gyro to the helicopter mechanics.
  • Page 4 When the governor operates and the rotor speed rotor stick. increases the lift also increases causing the  Do not drop the GY701 sensor onto a hard model to try lift off , depending on the pitch posi- surface or subject the GY701 sensor to a strong tion.

  • Page 5: Warranty And Repair Service (In U.s

    Its cutting-edge MEMS (Micro Electro Mechani- may also refer to your hobby dealer, or contact the cal System) sensor design, ultra high-speed pro- Futaba Service Center at the web site, fax or tele- cessing speed and advanced PID control algorithm phone number listed below: put it a quantum leap ahead of all other heading hold gyros in size, weight and performance.

  • Page 6: Contents

    EATURES ONTENTS • Gyro section Your GY701 includes the following components: • Advanced and adaptive PID operation is utilized Type of set • Small and low profile gyro sensor. 2 colors LED are installed on the top surface. Using the Aluminum •...
  • Page 7 ONTENTS ONTENTS GY701 Control Amp Sensor Mounting Stay Dust Cover Adjustment Screwdriver SENSOR SENS. THRO MXTR & Sx r.p.m 1 r.p.m 2 r.p.m 3 m.trim GOV on GOV off Mounting Pads on / off r.p.m THRO GV-1 m.trim Gyro Sensor...

  • Page 8: Specifications

    Angular Velocity Range: ±1,200 Degrees Per Second (Gyro) * The maximum operating voltage listed only applies to the GY701. Always verify that your receiver, servos, tail rotor servo, switch and any other electronic com- ponents used in your installation are capable of operat-...

  • Page 9: Connecting The Gy701 To Your Receiver

    • Connect to the gyro gain channel output. (6) rpm: Governor • Connect to the governor speed channel • Connect the GY701 and the output. receiver with the supplied ex- tensions. [(3) to (6)] (7) Tout: When using an S.BUS re-...

  • Page 10: Led Indicator Description

    ONNECTING THE TO YOUR ECEIVER NDICATOR ESCRIPTION Connect the supplied extensions to the GY701 Slow Flash: 1/2 Second or longer Fast Flash: 1/4 Second or shorter connecter. Route the wires through the helicopter mechanics and connect them to the appropriate receiver channels.

  • Page 11: Mechanics Preparation

    Please use the guidelines below and address all issues before installing and test flying the GY701. • The GY701 must be used with a rigid tail rotor drive system. Any modern torque tube or belt drive system should be adequate. Do not at- tempt to fly the GY701 using a wire driven tail rotor system.

  • Page 12: Opening Screen

    PENING CREEN CREEN The GY701 starts the initializing process at turned After finished the initialize sequence, OLED on the power. After finished the initializing, the changes the display to Home screen. There are 3 GY701 starts the operation and moves to the kinds of the Home screen related by the operation home screen.
  • Page 13 1 second period. After done the process, It supports as the operation guide. Push the key the rudder stick neutral is memorized to the GY701 to switch below this indicator, changes the editing mode. match the rudder stick neutral. This operation is use- ful for rudder neutral re_trimming from normal mode to AVCS mode.
  • Page 14 CREEN CREEN Revolution display 1. Max. revolution Governor Governor It memorizes the maximum engine revolution at the The battery voltage display is changed to engine operation. The display is changed to Max. revolution revolution display at starting the engine running, by pushing the mode + key.
  • Page 15 + or – key. 5. Operation mode　[default: Gyro+Gov] It sets the operation mode of the GY701. Set to “Gov- ernor” when the gyro sensor is not installed and set “Gyro” when the governor sensor is not installed. Set “Gyro+Gov”...

  • Page 16: Warning Display

    Input error Gyro It indicates the no rudder or throttle signal input. The GY701 does not work at this condition. Sensor error Gyro The gyro sensor does not work collect. The gyro does not work at this condition.

  • Page 17: Edit Screen

    CREEN CREEN The edit mode is changed to Gyro basic, Gover- Push DATA Push MODE +/– key +/– key nor basic, S.Bus basic mode by pushing the data+ or- key. These modes set the basic operation set- ting for initial flight. Pushing the mode + or – key for more than 1 second at the gyro or governor Max.

  • Page 18: Gyro Basic Setting

    DG 760: BLS251, S9256, S9251 WARNING DG 1520: BLS254, BLS257, S9254, S9257  When using the GY701 for the first time, or WARNING when making changes in the throw of a servo,  This parameter must match the type of ser- always perform the limit setting operation.

  • Page 19: Gyro Sensor Installation

    Set the remote gyro gain to 70% AVCS in the Installing the gyro sensor transmitter for the Normal and Hold flight The GY701 is supplied with three 2mm Mounting conditions and use 40% AVCS for all idle up Pads. When mounting the gyro in a larger electric conditions.
  • Page 20 OTOR ERVO NSTALLATION AND ETUP OTOR ERVO NSTALLATION AND ETUP Install the tail rotor servo into the mechanics Follow the instructions within the “Servo and connect the servo to the gyro. Remove Limit Point Setting” section and set the servo the servo arm screw from the servo.

  • Page 21: Before Flight Checklist

    Also be certain that your model’s tail The GY701 servo type parameter matches rotor drive train is up to the task. the servo you are using.

  • Page 22: Using Normal Mode

    DJUSTMENTS URING THE LIGHT SING ORMAL The tail rotor ratio, tail rotor pitch range and tail Most pilots today are using AVCS Mode. If blade length play a large part in achieving opti- you are just starting out, it is recommended that mum tail rotor performance.

  • Page 23: Setting The Gain

    ETTING THE ETTING THE Most modern computer transmitters will have a If your transmitter does not have a Gyro func- gyro function built into them. If this is the case, tion built in then it will be necessary to use the please refer to your transmitter’s instruction ATV or EPA function to control the gain.

  • Page 24: Governor Basic Setting

    OVERNOR ASIC ETTING OVERNOR ASIC ETTING It sets the governor’s fundamental functions. The menu (9) Servo limit point setting must be set first with other menu. (3) Gear ratio [default: 8.00, range: 3 ∼ 30] Input the main rotor gear ratio by pushing the data + or-key.
  • Page 25 • Throttle stick set at least the set point from vo you are using. Incorrect setting may damage slow side and engine running at 60% or more the GY701 or the servo, possibly resulting in a of set speedON loss of control during flight.
  • Page 26 OVERNOR ASIC ETTING OVERNOR ASIC ETTING (7) Battery failsafe setting [default: Inhibit] Invalid display (at PWM) The governor gets into the failsafe mode at the (6) Governor on/off switch [default: Inhibit] battery voltage is below 3.8 v when function is activated, the governor is disactivated and the It selects the governor activate switch if addi- throttle servo is moved to B/FS position at B/FS...
  • Page 27 (too narrow from high to idle below 50 % through).  When using the GY701 for the first time, or when making changes in the throw of a servo, always perform the limit setting operation.

  • Page 28: Mounting The Magnet And Sensor

    OUNTING THE AGNET AND ENSOR OUNTING THE AGNET AND ENSOR Cooling fan modification Modify the cooling fan and install the accessory magnet and attach the magnetic sensor to the en- Drill a hole in the fan at the magnet mount- gine at the position shown below.
  • Page 29 OUNTING THE AGNET AND ENSOR OUNTING THE AGNET AND ENSOR between the sensor and magnet The center of the sensor is different from the can be made 1 to 2mm. center of the sensor case so be careful when mounting the sensor. Tighten the sensor stay together with the engine mounting flange.

  • Page 30: Fuselage Setting Precautions

    USELAGE ETTING RECAUTIONS USELAGE ETTING RECAUTIONS Throttle servo linkage precautions different from that with a normal muffler. Adjust the needle (and pipe length) so that engine speed To effectively use the governor, observe the fol- changes are proportional to the throttle opening. lowing precautions when connecting the servo If the engine speed does not change linearly, the linkage.

  • Page 31: Governor Operation

    However, the engine must be running The GY701 stabilizes the engine speed to within +1% at the set speed. The GY701 turns off the gover- of the set speed. For example, if the rotor R.P.M. is set to 1500rpm, the Rotor R.P.M. speed will deviate nor when the engine is starting or idling.

  • Page 32: Governor Speed Setting

    OVERNOR PEED ETTING The GY701 is used by connecting the “rpm” input If 1800 R.P.M.’s is max then set governor to 1750) to the governor speed setting channel of your sys- • The maximum speed can be verified at the MAX.

  • Page 33: S.bus Basic Setting

    It is required the S.Bus compatible receiver. The wiring from receiver to servos is to be simple by using the S.Bus connection, only one main S.Bus wire is connected to receiver and GY701 can (2) S.Bus setting: Rudder channel [default: complete the operation. In addition, governor on/...

  • Page 34: Gyro Expert Setting

    S.BUS B ASIC ETTING XPERT ETTING It sets the detail of the gyro function for expert modeler. Push the mode + or – key for more than one second on the Gyro Basic menu, the editing is got into the Gyro expert menu. Push mode + or –...
  • Page 35 XPERT ETTING XPERT ETTING (4) Rudder exponential (7) Control delay Out default: -60% (F3C-AVCS), -40% (F3C-Normal), -20% (3D- default: F3C=10, 3D=12 AVCS), -20% (3D-Normal) ranges: 0 ∼ 20 ranges: -100% ∼ +100% It sets the rudder control delay at moving to neu- It sets the control feeling of the rudder control.
  • Page 36 3 GY701 installs the pitch-> rudder mixing internal- ranges: 1 ∼ 50 ly. The swash signal are mixed at the swash mode It sets the delay of the gyro gain changed from helicopter.
  • Page 37 ETTING GY701. Separate the pitch signal at the transmit- This setting must be done when F/F mixing is ter side, and input this signal to the GY701. To do used. that, making the programmable mixing as pitch-> AUX, and input AUX signal to the GY701.
  • Page 38 XPERT ETTING XPERT ETTING Pushing data+ or – key, the mode is changed. key during confirmation display, the reset process is aborted. (22) Neutral compensation default: ON This function works as recalling the neutral point of the rudder servo for improving the tail stop motion.

  • Page 39: Governor Expert Setting

    OVERNOR XPERT ETTING OVERNOR XPERT ETTING It sets the detail of the governor function for ex- (3) Revolution display mode pert modeler. Push the mode + or – key for more than one second on the Governor Basic menu display, the editing is got into the Governor expert default: Rotor menu.
  • Page 40 The fixed throttle input is utilizing related by the (10) Low limit at hovering revolution. It is recommended for the electric motor. Tx.Curve: GY701 uses the exact throttle input from the trans- default: 25 % mitter. The throttle curve setting on the transmitter range: 0 ∼ 80 % is required.
  • Page 41 XPERT ETTING and return to the start display. Pushing mode+ or – key during confirmation display, the reset process is aborted. FUTABA CORPORATION Phone: +81 475 32 6982, Facsimile: +81 475 32 6983 1080 Yabutsuka, Chosei-mura, Chosei-gun, Chiba 299-4395, Japan ©FUTABA CORPORATION...

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