Product detail

Nose landing gear retraction hydraulic actuator demonstrator

ŠPLÍCHAL, J. JURAČKA, J. AUGUSTIN, P. KAMENÍK, L. ČERMÁK, Z.

English title

Nose landing gear retraction hydraulic actuator demonstrator

Type

Functioning sample

Language

en

Original abstract

The result is a hydraulic cylinder for closing the nose landing gear of the L-39NG aircraft. The cylinder stroke is 220±1[mm] and the working pressure is p = 21 [MPa]. The cylinder is mainly made of 30ChGSA steel. Fatigue tests on samples show a possible change of material to 15-5PH H1025. System description: The hydraulic cylinder opens and closes the nose landing gear of the L-39NG aircraft. The landing gear cylinder is not under pressure when retracted. When the opening/closing sequence is started, the maximum pressure in the cylinder is 21 [MPa]. In the open position, the nose landing gear cylinder is constantly under pressure. The nose landing gear cylinder is not stressed by ground loads because the landing gear is equipped with a locking mechanism.

Keywords in English

Hydraulic cylinder

Create date

2025-12-17

BIBTEX


@misc{BUT199681,
  author="Jan {Šplíchal} and Jaroslav {Juračka} and Petr {Augustin} and  {} and  {}",
  title="Nose landing gear retraction hydraulic actuator demonstrator",
  year="2025",
  note="Functioning sample"
}