Handsome Rob

1. Name two advantages and two disadvantages of using a regeneratively cooled nozzle extension for an upper stage engine. 2. Which materials would you consider for a radiatively cooled nozzle extension? 3. Assume a nozzle extension consisting of two parts: one made of Ti6Al4V and one of C-103. Which of the two would you use close to the throat and which one further downstream and why?