The GY gyro by Futaba is perhaps the most popular RC helicopter gyro ever. need the manual for the GY, you can grab that here. Manual GY – Robbe Futaba. Manual GY Be the first to rate this product. Recommend ยท Ask question. Description. Manual GY – Robbe Futaba. CopterX GY Digital Gyro user manual. Thank you for purchasing CopterX GY Gyro! High performance, light weight gyro with AVCS (Angular Vector.

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Again, watch the LED to confirm which mode the gyro is in before making adjustments. Tail wags only right after a pirouette, or anytime I move the tail then stop.

Manual GY401

Next set the rudder servo arm so that it points straight up with the rudder stick and rudder trim centered. This gives HH when the switch is up. Speaking of servos, the vy401 in two different packages. Yes, the tape that comes with the gyro is not very cushiony, but that’s the way it needs to be. Also keep your tail shaft oiled. If so, my in depth review should help you decide before throwing your money down.

Once ideal trim is mwnual, land the model. That leaves two other connectors, mamual with 3 wires and the other with 1 wire. The first thing to do is make the link slide as free as possible. Those pilots wishing to use rate or normal can adjust that gain in the same manner as for AVCS, though the gain select switch will be thrown in the opposite direction than for AVCS.

In the old days, we ran as much gain as possible without having the tail “hunt” or “wag”. Do not use the rudder ATV for this purpose. Channel 5 works well in most Futaba receivers and transmitters.

The Futaba GY Gyro

The Futaba GY had a built in Limit Trimmer adjustment so you can set the amount of tail rotor servo travel to avoid servo over travel and stress on the servo. Do not disturb the rudder.


This gyro vy401 fast, only about 3 or 4 seconds. Wait 4 seconds for the gyro to initialize. Its simple set-up and solid performance characteristics have made it a hands down favorite among many sport helicopter pilots.

If it is dry and tacky this will cause the problem. Use an exacto knife to shave this off.

Manual GY – Robbe Futaba

What follows is ONE example for setting up the GY gyro that works for virtually any model and almost any brand of radio. Adjust the tail rotor linkage until the model hovers with the tail in trim. On my gy that came with the servo I have found 84 is what it took. One direction will set the gain value for heading hold and the other will be for standard rate.

Move the rudder stick to the right, then back to center, if the rudder servo does the same then you are in normal mode which is wrong. This will set how fast the helicopter rotates.

Check and double-check this point, because getting it backwards can cause needless excitement on a model’s first flight. Once you get the link as free from resistance as you can. For now set both to but later you may need to adjust this down a little to keep the gyro from ‘hunting’.

This adjustment only effects how fast the tail moves your pirouette rate. Turn on the receiver. Use care here; small increases can make large changes pirouette rate. Pull the link as far forward as it can go then adjust the ‘Limit’ control on the top of the gyro so that the ball on the servo arm centers with the link.

With transmitter and receiver turned on, watch the red LED on the gyro after the gyro initializes. The “direction” DIP switch is set such that movement of the nose of the model to the left counter clockwise causes the gyro to supply a right tail rotor command to the servo.

Do the same for ‘GEAR’.

Notice that the values are different, you do not need as much to rotate the helicopter to the left because it is going ‘with’ the torque in that direction. The large range of heli size usage and outstanding performance is why the GY outsold every other performance gyro on the market. Gu401 not disturb the trim in the radio. Also as with all heading hold gyros you have to wait for the gyro to initialize after power up before you can move the helicopter.


If the servo moves to one direction but does not move back to center then you are in heading hold mode which is right. It avoids the use of any preprogrammed gyro software, because many months of following posts and questions on the various web forums has proven that those software menus sometimes produce more confusion than the set up manal to be detailed.

Futaba GY Gyro. Make sure the guides are aligned for least resistance.

Quick Start Guide for the GY401

The best position for tail centering is to adjust the rudder link so that you have 4. Manuwl of Use Privacy Policy. The signal side will be opposite of the black ground side. Once you are finished you can snap the link on the ball. Is it worth adding by401 your fleet? The tail rotor servo is plugged into the output lead gy4011 the gyro. Now that you’re done with that, you need to flip the GEAR switch back to heading hold mode. Set the tail lever so that an imaginary line drawn from the two screws is parallel to the tail shaft.

Further adjustments are rarely needed as most pilot fly in ACVS mode all the time. Mount the Gyro on the back plate behind the main shaft. Next check that the front link is centered with the ball on the servo arm.

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