Cart Preview

Eagle A3-L 3 Axis Airplane Gyro

Brand: HobbyEagle /
Regular price 22.99

Eagle A3-L Airplane Flight Stabilizer / 3 Axis Gyro

The Eagle A3-L Airplane gyro is the new upgraded version of the top selling Eagle Pro SE. This new version has been completely redesigned and is a significant upgrade over the previous generation A3 Pro. Major updates include a new light-weight protective shell, updated v2.7 logic software, remote master gain control, and automatic gyro calibration at start-up. The Eagle A3-L has three gyro modes: normal/2D mode, 3D mode, and gyro deactivated mode. Additionally it supports both analog and digital servos and provides separate gain adjustments for each flight mode. All functions of the Eagle A3-L are easy to setup via a simple on-board button and indicator LED. While the A3-L provides excellent stability for larger planes and jets, it is also perfect for smaller airplanes or where space is a premium. The Eagle A3-L offers an incredible advance in airplane gyro technology for an affordable price.

Why use an airplane gyro?

Gyros (also called flight stabilizers) help keep your airplane stable during take-off, flight maneuvers, and landings which can be helpful during windy days or when learning how to fly RC planes. Gyros also help you master aerobatic maneuvers like knife edges and hovering as the system can "lock" in a planes position / trajectory. Once thought to be for beginners only, Gyros are now common in all classes of aircraft and are utilized by all levels of flyers. Gyros are great for learning, they let pilots practice advanced aerobatics, they give you piece of mind in less than ideal flight conditions, and they can often help you avoid costly crash damage.

Need more convincing? Be sure to read our article Gyros: Clearing Up The Stigma from our Knowledge Blog.


  • Works with all major receiver brands including Spektrum, Futaba, Hitec, JR, Tactic, and more.
  • 3 Pre-programmed flight modes (flight modes are selected using a 3 position switch on your transmitter):
    • Normal Mode (2D Mode): this is the standard flight stabilization mode found on most airplane gyros.
    • 3D Flight Mode: this mode will attempt to hold the LAST position the aircraft was in. For example, if you put the airplane into a knife edge and then activate 3D mode, the airplane will hold the knife edge as long as the pilot provides appropriate throttle input.
    • Gyro Deactivated Mode: this turns the gyro off to allow unassisted/non-stabilized flight.
  • 3 Wing Types: Normal Airplane, Flying-wing (Delta-wing) and V-tail.
  • One-key setting mode with colored LED indicator light
  • Remote Master Gain
  • Supports 50Hz, 125Hz, and 250Hz Servo Frequencies
  • Separate gain adjustment for each flight mode
  • Automatic gyro calibration (auto stick centering) at start-up
  • High Voltage (7.4v) compatible
  • Futaba S.Bus and S.Bus 2 compatible
  • Easy to use, extremely well-suited to beginners.
  • small, lightweight form-factor


  • Eagle A3-L Flight Stabilizer
  • NEW - 16V EZ-Plug capacitor to help maintain a secure voltage level during flight
  • 3M Foam mounting tape
  • 4 x 150mm(6") male to male servo wires to connect stabilizer to your receiver


  • Input Voltage: DC 5V-7.4V, powered from the receiver directly
  • Gyroscope: 2000 dps, 1kHz
  • Servo Frequency: 50Hz/125Hz/250Hz
  • Servo Travel: 1520500s Limit 970-2070s
  • Operating Temperature: -40 ℃ to 85 ℃
  • Size: 43mm x 27mm
  • Weight: 11 g (excluding wires)

Which Eagle Gyro is right for me?

Sensor 2D Mode 3D Mode Auto-Recovery Auto-Hover Remote Gain S.Bus HV Upgradable Price
A3-L 3-Axis x x x x x $
A3 6-Axis x x x x x x $$
A3 Super II 6-Axis x x x x x x x x $$$

IMPORTANT - Please Read This Carefully

  • Proper setup of the Hobby Eagle Gyro is crucial. Read the gyro instruction manual completely before attempting to fly your aircraft. Failure to follow setup instructions can result in loss of control and inevitable damage to your aircraft.
  • Ensure the gyro is installed in the proper orientation (see manual) and is mounted to a hard surface near the aircraft's CG point.
  • When you first plug in your aircraft battery, keep your radio sticks in the centered positions and DO NOT move your aircraft for at least 10 seconds to allow the gyro to perform self-calibration. The gyro LED will blink blue rapidly for about 3 seconds while calibrating.
  • It is crucial to verify that the gyro is moving the control surfaces in the correct direction BEFORE attempting to fly your aircraft. Failure to do so could result in loss of control or even a crash during flight.
  • We strongly recommend that you setup one of your gyro control switches (3 position switch on your radio) to activate Gyro Disable. This safety feature will allow you to electronically bypass the gyro if you encounter a gyro setup issue during your maiden flight.
  • ANY warranty claim for Hobby Eagle gyros applies to the gyro only, not the aircraft in which the gyro was installed.


The new A3 series provides 5-channel inputs and 3-channel outputs. You only need to connect the receiver and servos to the corresponding pins on the side of the controller. The knobs are used to adjust the gain for each flight mode, clockwise to increase, anti-clockwise to decrease. Futaba's S.Bus and S.Bus 2 are supported by the new A3 series.

Tech Note:  This gyro is not to be used for Nitro or Gas-powered R/C aircraft.

A3-L Setting Menu

When the controller is working, press and hold down the button for more than 2 seconds which will allow you to enter the settings menu as all settings are completed by the button. Please consult the manual for more details.

Package Contents

The box contains 4 receiver wires and 2 pieces of double-sided tape in addition to the A3.

Product Videos

Product Reviews

Product Questions & Answers