Which type of landing gear is used in the aircraft described?

The selection of retractable tricycle type landing gear indicates that the aircraft in question is designed to have its main wheels retract into the fuselage during flight, which enhances aerodynamics and reduces drag. This design is commonly found in high-performance aircraft that are capable of higher speeds and require improved performance characteristics. The tricycle configuration, with one nose wheel and two main wheels, provides better stability during takeoff and landing compared to other configurations, particularly when it comes to preventing nose-over incidents.

Retractable landing gear is typically used in more advanced aircraft, as it requires additional systems for extension and retraction. This type of landing gear also helps in achieving better overall fuel efficiency due to aerodynamic benefits.

The other types of landing gear, while suitable for different aircraft and missions, do not share these specific aerodynamic advantages or operational characteristics that retractable tricycle gear provides. Fixed tailwheel gear, conventional gear, and float gear are more suited for certain types of aircraft and operating environments, but they do not incorporate the retractable feature that enhances performance in the way described in the question.