The Futaba GY401 Gyro

Futaba GY 401 GyroFutaba GY 401 Gyro

After many years, the Futaba GY401 Gyro used to be the bench mark gyro that all others were judged.

Ask 5 RC helicopter enthusiasts what the best solid state heading lock gyro was when they first came out, and 4 of them will likely say the GY401.

It is said that copying someone or something is the highest form of flattery; guess that is why there was a cheap GY-401 clone hitting the market almost every month back then. Unfortunately while many try – none provide the performance or piece of mind Futaba’s GY series of gyros offer.

The Futaba GY401 gyro was for the heli pilot who wanted both flexibility in terms of what model heli the gryo works well with and wants the assurance that a gyro malfunction or failure won’t bring down his/her dream machine.

The GY-401 worked well in almost every single rotor bird out there from 400 size electrics up to 52cc gas or MW54 powered turbine monsters with rotor diameters approaching 2 meters. In fact, Bergen RC recommended the the GY 401 in their industrial Observer line of heavy lift gas and turbine RC helicopters.

The large range of heli size usage and outstanding performance is why the GY-401 outsold every other performance gyro on the market. In fact, when I asked my local (okay, 500 km away) hobby shop how many Futaba GY-401’s they sell – the numbers were remarkable. More 401’s than all the other gyros combined back then – pretty impressive!

I know many people who started with a Futaba GY401 gyro in a small 400 size electric knowing one day they wanted to get into a larger electric or nitro powered heli. The GY-401 followed the progress and that alone offered some nice value if you didn't want to have to purchase another gyro for your next bird.


Futaba GY401 Gyro Features

AVCS (Angular Vector Control System) is Futaba’s patented heading hold gyro technology. AVCS works better than other HH gyro systems at correctly compensating for and eliminating drifting issues in heading lock/hold mode caused by temperature changes within the gyro.

The GY-401, just like all of Futaba’s AVCS gyros used a SMM gyro sensor and is said to be better than other conventional solid state yaw sensing technologies since all the electronic components are combined on a single chip improving performance and reliability. SMM stands for Silicone Micro Machine.

Both Gain and Heading Lock/Rate modes are remotely adjustable through the gyro settings menu on a computerized radio. If you didn't have a programmable computerized radio that you can program in different ATV values for the gain settings, the Futaba GY401 will not work for you – there are no gain or mode selection options on the gyro case. A better choice for non computerized radios or if you are lacking a spare channel for remote gain would be the Futaba GY240 or the E-flite G90 (for smaller helis).

The Futaba GY401 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. This is an easy way to set the travel over the more conventional method of changing servo arm/tail rotor pitch arm lengths.

As mentioned, the GY401 supported both slower analog tail rotor servo pulse rates or can be switched to a 270 Hz high frequency rate for fast tail rotor specific digital servos. Speaking of servos, the 401 came in two different packages.

You could purchase the Futaba GY401 Gyro only package or the Gyro/Servo combo package.

Futaba GY 401 Gyro Servo Combo

The servo combo included the ultra fast digital Futaba S9254 tail rotor specific servo. This servo boasts a speed of 0.06 sec/60 degrees and a torque of 47 oz-in. It has been perfectly matched to operate with the GY401 in fast digital mode.


FUTABA GY401 GYRO SPECIFICATIONS

  • Type: Micro Heading Hold Gyro
  • Sensor: SSM AVCS
  • Weight: 27 grams (0.95 oz)
  • Dimensions (WxLxH): 27 x 27 x 20mm
  • Gain Setting: Remote Only
  • Mode Setting: Rate or Heading Hold – Remote Only
  • Operating Voltage: 4.8 VDC (Needs a voltage regulator (6 VDC) if using higher than 4.8v battery packs)
  • Reversing Switch: Yes, on gyro
  • Limit Trimmer: Yes, adjustment on gyro
  • High/Low Frequency Rate Selectable Switch on Gyro (Analog and Digital Servos Support) 

FUTABA GY401 INSTRUCTION MANUAL

Search This Site

YouTube Channel

Click To My YouTube Channel

Social This Site


Translate This Site

Multi eBook Spring 2015 Sale On Now
Save up to 25%
1 eBook = Regular Price
2 eBooks = 10% Off
3 eBooks = 15% Off
4 eBooks = 20% Off
5 eBooks = 25% Off

Discount is automatically calculated as eBooks are added to the shopping cart. *Does not apply to Beginner's Guide Combo*


Setup & Tips For RC Helis

Click Image For Details
Add to Cart View Cart

The Setup & Tips For Electric Collective Pitch RC Helicopters e-Book helps you understand all about setting up a collective pitch RC helicopter along with many other useful tips. Click on the image of the book or watch the video below to find out more about what information is covered in this, my most popular & #1 selling e-book.


Beginner's Guide To Flying RC Helicopters

Click Image For More Details
Add to CartView Cart

The Beginner's Guide To Flying RC Helicopters is an e-Book that goes over the basics of getting started with RC helicopters. Click on the image of the book to learn more about what's inside.


Swash Setup, Leveling & FBL Configuration

Click Image of eBook For More Information
Add to Cart View Cart

The 120/135/140 Degree Swashplate Setup, Levelling & FBL Configureation e-Book shows how to properly setup and level a 120,135, or 140 degree electronically mixed swash to attain perfect interaction and a trimmed out bird off the bench. Click on the image of the book or watch the video below to learn more about it.


Getting The Most Out Of Your mSR/X & 120SR

Click Image For Details
Add to CartView Cart

Getting The Most Out Of Your mSR/X & 120SR is an e-Book that focuses on the Blade mSR, mSRX, & 120SR. Click on the image of the book or watch the video below if you want to find out more about it.


How To Build Training Gear

Click Image For Details
Add to Cart View Cart

RC helicopter training gear is the essential training aid used when learning to hover and fly most RC helicopters, this e-Book shows how to build them. If you want to learn more about what's inside, click on the image of the book or watch the video below.


*Beginners Guides Combo Deal

Click Image For More Details

Thinking of getting into planes too, or trying to decide between RC helicopters or RC airplanes? If so, the Beginners Combo deal which includes both the Beginners Guide To Flying RC Helicopters and the Beginners Guide To Flying RC Airplanes e-Books, represents excellent value for anyone looking to get started safely and quickly in either or both forms of radio control flying.


Good Beginner RC Helicopters & Quadrotors


RC Heli Magazine


Helicopter Movies


Quality Pulse LiPo Batteries