No, the Embraer ERJ 145 regional jet does not feature an auto-throttle system.
Understanding the ERJ 145's Speed Management
The Embraer ERJ 145 family of regional jets is known for its efficient design and operational characteristics. However, it distinguishes itself from many larger or newer aircraft by not incorporating an automated throttle control system. This means that pilots are directly responsible for managing engine thrust throughout all phases of flight.
What is an Autothrottle System?
An auto-throttle is an automatic power control system that manages the thrust of an aircraft's engines. Its primary function is to maintain a specific airspeed, Mach number, or desired thrust setting, as programmed by the flight crew or the Flight Management System (FMS). It's a significant component of modern aircraft automation, designed to reduce pilot workload, improve fuel efficiency, and enhance flight precision.
How Speed is Managed on the ERJ 145
In the absence of an auto-throttle, ERJ 145 pilots rely on a hands-on approach to speed control:
- Manual Thrust Control: This is the primary method for managing speed. Pilots directly manipulate the thrust levers to achieve and maintain desired airspeeds, responding to flight phase requirements, Air Traffic Control (ATC) instructions, and operational procedures.
- Flight Management System (FMS) Guidance: While the FMS does not control the throttles, it provides crucial speed targets and optimal thrust settings for various flight segments (e.g., climb, cruise, descent, approach). Pilots monitor these targets on their cockpit displays and manually adjust engine thrust to match them.
- Flight Director (FD): The flight director provides visual pitch and roll commands on the primary flight display to guide the aircraft along the desired flight path. When combined with manual thrust adjustments, it assists pilots in maintaining the correct speed and energy state.
This continuous, active management of thrust requires pilots to maintain a high level of awareness regarding airspeed, engine performance, and the aircraft's energy state, making manual adjustments as necessary.
| Feature | Autothrottle-Equipped Aircraft | ERJ 145 Regional Jet |
|---|---|---|
| Throttle Control | Automatic based on programmed settings | Manual, pilot-controlled |
| Speed Management | System-driven, precise adjustments | Pilot-driven, active monitoring |
| Workload Reduction | Significant, especially in complex phases | Less, requires continuous pilot input |
| Typical Usage | Most modern commercial airliners, advanced business jets | Older regional jets, some smaller and less automated aircraft |
Implications for Pilots and Operations
The absence of an auto-throttle system in the ERJ 145 places a greater emphasis on the pilot's manual flying skills and attention to detail concerning speed management. Pilots must consistently monitor airspeed indications and engine parameters (such as N1 or EPR—Engine Pressure Ratio) to ensure the aircraft is performing optimally. This design choice reflects a philosophy of aircraft operation where pilots maintain a more direct and continuous interaction with the aircraft's power settings, underscoring the robust training and operational discipline inherent in ERJ 145 flight crews.
