| 1. | The actual critical Mach number varies from wing to wing.
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| 2. | The true airspeed corresponding to the critical Mach number generally decreases with altitude.
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| 3. | The Me 262 appeared to have a higher critical Mach number than any American fighter.
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| 4. | These problematic phenomena appearing at or above the critical Mach number became known as compressibility.
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| 5. | A swept wing delays the onset of this problem by increasing the critical Mach number.
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| 6. | The wing-and tail-thickness ratio was also reduced to increase the critical Mach number.
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| 7. | At the "'lower critical Mach number "', airflow around the entire aircraft is subsonic.
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| 8. | At the "'upper critical Mach number "', airflow around the entire aircraft is supersonic.
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| 9. | The aircraft Mach number at which these effects appear is known as its critical Mach number, or M CRIT.
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| 10. | For high subsonic flows, the Critical Mach number ( M 1cr ) is a characteristic value of considerable importance.
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