Which type of rocket is typically more stable and modern?

Liquid-fuel rockets are often considered more stable and modern due to their design characteristics and operational capabilities. These rockets utilize a combination of a fuel and an oxidizer, which can be stored in separate tanks before being mixed in a combustion chamber. This separation allows for precise control over the fuel flow, enabling adjustments during flight that can enhance stability and performance.

Furthermore, because liquid-fuel rockets can be throttled, shut down, or restarted, they can maintain stability throughout different phases of flight, which is a significant advantage in complex missions. This adaptability is particularly beneficial for achieving desired trajectories and ensuring safe re-entry or orbital maneuvers.

In contrast, solid-fuel rockets offer simplicity and reliability but lack the ability to control thrust or shutdown once ignited. Hybrid rockets, while innovative and combining aspects of liquid and solid, still face challenges in stability. Pulse rockets are generally considered less stable and have limited practical applications in comparison to liquid-fuel systems.

Therefore, the stability and modern design of liquid-fuel rockets make them preferable in various aerospace applications.