Question: 1 . Plot the propulsive efficiency of an ideal ramjet as a function of ue / u for values of ue / u ranging from

1. Plot the propulsive efficiency of an ideal ramjet as a function of ue/u for values of ue/u ranging from 1 to 4.
2. Consider isentropic flow in a converging-diverging duct. Explain why Mach number can increase indefinitely with increasing expansion area ratio while velocity reaches a maximum limit.
3. Explain why the use of a scramjet to produce thrust at Mach numbers above Mach 5 is technically extremely challenging
1 . Plot the propulsive efficiency of an ideal

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