Research Article
An Experimental Characterization on the Acoustic Performance of Forward/Rearward Retraction of a Nose Landing Gear
| | Case no. | Cavity dimension () | | Ma | Landing gear position | Noise reduction rig |
| | 1 | — | 60 m/s | 0.18 | — | — | | 2 | | 40 m/s | 0.12 | — | — | | 3 | | 50 m/s | 0.15 | — | — | | 4 | | 60 m/s | 0.18 | — | — | | 5 | | 60 m/s | 0.18 | P1 | — | | 6 | | 60 m/s | 0.18 | P2 | — |
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