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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Without a doubt, the GY gyro with or servo is one of the best tail rotor stabilization systems produced to date. Its simple set-up and solid performance characteristics have made it a hands down favorite among many sport helicopter pilots. The instructions that come with the gyro are good, but they offer several manuql for set-up.

Futaba GY Gyro How-to

Some of these options are more confusing than others, sometimes confusing the newcomer and making him or her feel the gyro is a great deal more complicated to set-up than it ever has to be. What follows is ONE example for setting up the GY gyro that works for virtually any model and almost any brand of radio. 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 nanual about to be detailed.

The GY works best with the or servos, period. Even the best conventional analog and digital servos that Futaba produces pale in comparison to the performance achieved when the gyro is paired with gy01 or servo tail rotor servo.

Quick Start Guide for the GY Step by step setup: Multiple layers of tape are unnecessary and potentially detrimental to gyro performance if the mounting becomes excessively “spongy”. On most helicopters, a servo wheel with ball joint mounting radius of A wheel with a hole drilled for the ball joint is preferred over a “star” arm because of greater rigidity.


The helicopter model and engine must be running smoothly. No gyro will perform correctly if the model is vibrating or the engine is incorrectly tuned.

Confirm that no sub-trim or ATV is present in the transmitter in any flight condition on the rudder channel. This point is critical.

Team Futaba Tip #2

Using the limit trimmer pot on the gyro, adjust the tail rotor travel as needed for no binding at extremes of throw. Make certain left and right inputs are checked, because many helicopters have asymmetrical tail rotor pitch change mechanisms. The delay trimmer should remain at 0. Set the DIP switch on the gyro for digital servo, assuming manjal or is installed.

The Futaba GY401 Gyro

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. Check and double-check this point, because getting kanual backwards can cause needless excitement on a model’s first flight.

The rudder input lead for the gyro is plugged into the rudder channel slot in the receiver. On a Futaba receiver, this is channel number 4.

The tail rotor servo is plugged into the output lead from the gyro. The gain select lead is plugged into any unoccupied slot in the receiver that has a corresponding switched channel on the transmitter. Channel 5 works well in most Futaba receivers and transmitters. Inhibit all preprogrammed gyro software in the transmitter. With transmitter and receiver turned on, watch the red LED on the gyro after the gyro initializes.

The ATV for the gain select channel has two sides. One side controls heading hold gain; the other side controls rate gain.

Observing the ATV screen in the radio for the gain select channel will allow the user to determine which is which. This value rarely causes the tail to “hunt” on first hovering flights. This value will yield a mild pirouette rate that can then be mznual to suit the taste of the pilot.


Adjust the tail rotor linkage until the model hovers with the tail in trim.

Do not disturb the trim in the radio. Proper trim can and should be obtained mechanically by adjusting the tail rotor pushrod. Once ideal trim is obtained, land the model. Do not disturb the rudder. The model should now hover with no drift. In the old days, we ran as much gain as possible without having the tail “hunt” or “wag”. Proper technique for greatest tail rotor servo life should be to run as much gain as needed for the most demanding maneuver and no more.

This value may be well below the point of “hunting”, but that is just fine. Again, watch the LED to confirm which mode the gyro is in before making adjustments.

It should be solid in AVCS mode. Further adjustments are rarely needed as most pilot fly in ACVS mode all the time. 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. Do not use the rudder ATV for this purpose.

The distinction is important to recognize as the proper use of the AFR function will ensure no drifting problems occur with the gyro. Use care here; small increases can make large changes pirouette rate. Terms of Use Privacy Policy.