Why does a modern aircraft still need a RAT?

Modern aircraft have multiple generators.
Some even have electrical power coming from both engines, the APU and batteries.

So why do they still carry a small emergency turbine?
It's called a RAT (Ram Air Turbine).

A small turbine that can deploy into the airflow and use the aircraft's speed to keep essential aircraft systems powered.
Depending on the aircraft, it may provide electricity, hydraulic power, or both.

And despite all the redundancy built into modern aircraft, it remains one of the last lines of defence.

When deployed, the RAT extends into the airflow and starts spinning.
That energy is then used to keep essential systems available.
Not the entire aircraft.
Just the systems needed to keep the aircraft safely under control.

Because aircraft are designed around a simple principle:
No single failure should lead to a catastrophic outcome.

So engineers keep adding layers of redundancy.

And the RAT is one of the final layers.

The interesting part is that it spends almost its entire life doing absolutely nothing.
Most RATs will never be used in service (and thankfully, that's exactly how it should be).

But if multiple power sources are lost at the same time, it can become one of the most important components on the aircraft.

A small turbine.
Hopefully never needed.
But always ready.

Have you ever seen a RAT deployed in real life?
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#Call_For simulator (FTD) EXAMINATION

(TRAINEE PILOT CANDIDATES – Addis Ababa -First Round)

https://corporate.ethiopianairlines.com/AboutEthiopian/careers/results

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The wait is worth it

✈️ Pitch Angle, Flight Path Angle, and Angle of Attack... They're NOT the Same!

Many aviation enthusiasts and even student pilots often confuse these three important aerodynamic concepts. Although they are closely related, each one describes a different aspect of an aircraft's attitude and performance.

📌 1. Pitch Angle
The Pitch Angle is the angle between the aircraft's longitudinal axis (nose direction) and the horizon.
It simply tells you where the aircraft is pointing not necessarily where it is going.

📌 2. Flight Path Angle
The Flight Path Angle is the angle between the aircraft's actual direction of travel (Velocity Vector) and the horizon.
This indicates whether the aircraft is climbing, descending, or flying level.

📌 3. Angle of Attack (AoA)
The Angle of Attack is the angle between the wing's chord line and the relative airflow.

The Relationship

Pitch Angle = Flight Path Angle + Angle of Attack

For example:

Flight Path Angle = 10°
Angle of Attack = 5°
Pitch Angle = 15°

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Yup, especially the daily dose of the F-word.

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Urgent ,normal Passport (60 day)and renewal የምትፈልጉ
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How to pass your Part-66 application without rewriting your logbook from scratch...

Look at the two logbook entries in this image.

Same engineer. Same logbook. Same aircraft type.

One will get rejected.
One won't.

The wrong entry tells the CAA what was done.
The right entry tells them WHAT, WHY and HOW.

That's the gap between a license application that gets approved and one that comes back with a list of queries.

Here's what makes the right entry work:

✔ Reason for the job - what triggered the task
✔ Detailed description - system, component, action taken
✔ Manual reference - AMM, TSM, FIM with task number
✔ Finding and result - what you found, what you did, final status
✔ Consistent standard - every entry built the same way
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Aircraft maintenance is divided into two major categories : base maintenance and Line Maintenance.

While both are essential to aviation operations, they serve very different purposes. Base maintenance involves heavy, scheduled inspections and major repairs performed inside hangars, often requiring aircraft to be grounded for days or even weeks.

This is where deep structural inspections, overhauls, modifications, and extensive troubleshooting take place to restore long-term airworthiness and performance Line maintenance, on the other hand, focuses on quick turnaround tasks performed between flights directly on the ramp or at the gate.

These include daily inspections, servicing, minor repairs, and defect checks that ensure the aircraft is safe and ready for its next departure. In simple terms, base maintenance keeps an aircraft healthy over its lifetime, while line maintenance keeps it operating safely every single day. Together, they form the backbone of aviation safety and operational reliability.

Every takeoff is proof that the sky is never the limit it’s just the beginning. ✈️☁️
Some see an airplane… we see freedom, ambition, and endless possibilities. ✈️💙
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Engine starting system

✔ APU (Auxiliary Power Unit)

The most common source on the ground. It supplies bleed air to the starter.

✔ Ground Air Cart

Used when the APU is inoperative or not available.

✔ Cross-Bleed From Another Engine

During in-flight restarts or single-engine ops.

This air flows through ducts to the Starter Pneumatic Valve, which regulates the airflow.

✈️ Every passenger sees an airplane.

Engineers see thousands of interconnected systems working together as one extraordinary machine.

This exploded view of a commercial aircraft is a powerful reminder that an aircraft is far more than a fuselage with wings. It is a masterpiece of structural engineering, aerodynamics, and precision manufacturing..

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PRESERVATION AND REPLACEMENT

Preservation of the Engine
Engine preservation provides maximum protection to critical engine components such as gears, bearings, and accessory components against damage from excessive moisture, debris, and other environmental
conditions.
Preservation is used for the protection of out--of--service engines, whether on--wing or off, and for engines to be put into storage.
Preservation methods include:
* Method 1: Preserve The Engine For 60 Days Or Less
* Method 2: Preserve The Engine For More Than 60 Days.
Use the preservation method that is necessary for the time that the engine will be in storage. If you are not sure as to the length of storage time, use Method 2.
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Winglets: A Small Design That Delivers Big Results

At first glance, a winglet may seem like a simple upward extension at the tip of an aircraft's wing. In reality, it's one of the most effective aerodynamic innovations in modern aviation.

By reducing wingtip vortices and induced drag, winglets help aircraft fly more efficiently, resulting in:

✅ Lower fuel consumption
✅ Increased flight range
✅ Reduced carbon emissions
✅ Improved overall aircraft performance

This small modification not only helps airlines reduce operating costs but also supports a more sustainable aviation industry by lowering environmental impact.

Aviation is full of innovations where every detail has a purpose.
Sometimes, the smallest engineering solutions create the biggest impact.
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አዲስ አበባ University ቀጣይ አመት ለመቀላቀል ያሰባቹ ይሄን Channel join ይበሉ በብዙ ታተርፋላቹ @AUTORIAUAT