Do you know engines clack? #aviation #avgeek #cfm56 #engines #fyp #fanblades #asmr

Do you know why some engines make a “clapping” sound when they windmill? This is why! The fan blades themselves are loose to allow enough clearance for thermal expansion, while the fir-tree mounts secures the blades in place while the engine is running using centrifugal force #aviation #avgeek #cfm56 #engines #fyp #fanblades #asmr