3 ms·
The crackle of the air moving back and forth during a shuttle launch would be so fast and intense that the friction of the air (near the launch pad) would set t
by jvm___ 3y ago
The crackle of the air moving back and forth during a shuttle launch would be so fast and intense that the friction of the air (near the launch pad) would set the grass on fire.
- admash 3y agoThat was such a delightful fact that I had to source it. Tragically, it is not true. Gee, K. L., Mathews, L. T., Anderson, M. C., & Hart, G. W. (2022). Saturn-V sound levels: A letter to the Redditor. The Journal of the Acoustical Society of America, 152(2), 1068-1073. https://web.archive.org/web/20220831190741id_/https://asa.scitation.org/doi/pdf/10.1121/10.0013216 https://web.archive.org/web/20220831190741id_/https://asa.sc... "While this peak level represents acoustic amplitudes that would propagate nonlinearly to rapidly form shocks and result in perception of jet “crackle” (e.g., see Gee et al., 2016), will it melt concrete or set grass or one’s hair on fire? It will definitely not."
- mrchucklepants 3y agoThe lead author of this paper is a friend of mine and an expert in non-linear acoustics, particularly jet and rocket noise.