RAM recovery refers to which phenomenon?

• A. The max altitude an engine can sustain without re-fueling.
• B. The process of slowing down through ram air cooling.
• C. The increase in thrust as a result of ram air pressures and density on the front of the engine caused by air velocity.
• D. The moment when the aircraft's landing gear is retracted.

Answer: (C)

RAM recovery is the boost in engine performance you get from ram air effects: as the airplane moves through the air, the air entering the engine is compressed by the forward motion, increasing the stagnation pressure and air density at the intake. That higher pressure and greater mass flow into the compressor raise the compressor discharge pressure and, in turn, the thrust produced by the engine. The effect grows with speed and is more noticeable when the engine relies on inlet pressure to help the compressor. It’s not about altitude limits, cooling by ram air, or gear operations, but about how speed-related air compression at the intake provides extra thrust.