06:3306:33, 26 September 2018diffhist+496
Slip ratio
Pointing out that slip does not take place at the contact patch of the tire, but inside the tire material between road and the rim (mostly sidewall) due to deformation of tire. It's not sliding while driving on dry pavement.
16:4216:42, 7 May 2018diffhist+695
Overall pressure ratio
Added a note on overall pressure ratio of concorde, as the source uses a different and contradictory definition than this article does. Shockwaves reduce stagnation pressure at intake in supersonic flight, they only increase static pressure!