Fig.2.5 is a bad reflection of temperature distribution for any re-entry vehicle. The reason for this outcome is associated with electric circuit. Instead of current flowing through the graphite heat shield, it flows through tungsten because tungsten is a better electrical conductor than graphite. This leaves the heat shield with little or no flow of current. Zero current results in zero heat flux according to Eq.1.1. Further improvement of the model in Fig.2.4 results in Fig.2.6 where the idea is to have tungsten fins up to half of the heat shield diameter.