During hypersonic planetary entry, blunt-nosed entry capsules establish a detached bow shock wave standing offset from the heat shield. In accordance with the Allen-Eggers blunt body principle, the massive shock wave dissipates the vehicle's colossal kinetic energy into the surrounding shock layer gas rather than conducting it directly to the surface. An ablative heat shield absorbs the residual convective and radiative thermal loads through controlled endothermic pyrolytic mass loss.