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Its purpose is to provide a smooth and undisturbed airflow to the face of the compressor.
2 Common designs are the "pitot-type" and the "S-shape" (tailcone engines) which forms divergent intakes to slow down the airflow and make maximum use of the ram effect.
The efficiency decreases as the aircraft approaches sonic speed (shock formations).
Ram Pressure Recovery
When the aircraft is stationary, the pressure in the intake is below the ambient pressure. When the aircraft speeds up, the pressure in the intake starts to rise. At a certain point (usually about M 0.1 - M 0.2) both pressures will be equal (ramp pressure recovery).
Note;
- Crosswind during take off may adversely affect the airflow into the intake
- Turbulence may require continuous ignition (prevent 'flame out') and keeping the turbulence penetration speed and correct RPM/EPR
- If icing conditions are expected, activate the engine anti-icing system
2 Common designs are the "pitot-type" and the "S-shape" (tailcone engines) which forms divergent intakes to slow down the airflow and make maximum use of the ram effect.
The efficiency decreases as the aircraft approaches sonic speed (shock formations).
Ram Pressure Recovery
When the aircraft is stationary, the pressure in the intake is below the ambient pressure. When the aircraft speeds up, the pressure in the intake starts to rise. At a certain point (usually about M 0.1 - M 0.2) both pressures will be equal (ramp pressure recovery).
Note;
- Crosswind during take off may adversely affect the airflow into the intake
- Turbulence may require continuous ignition (prevent 'flame out') and keeping the turbulence penetration speed and correct RPM/EPR
- If icing conditions are expected, activate the engine anti-icing system
