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Nose landing gear retraction hydraulic actuator demonstrator

The result's identifiers

  • Result code in IS VaVaI

    <a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216305%3A26210%2F26%3A0199681" target="_blank" >RIV/00216305:26210/26:0199681 - isvavai.cz</a>

  • Result on the web

  • DOI - Digital Object Identifier

Alternative languages

  • Result language

    angličtina

  • Original language name

    Nose landing gear retraction hydraulic actuator demonstrator

  • Original language description

    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.

  • Czech name

  • Czech description

Classification

  • Type

    G<sub>funk</sub> - Functional sample

  • CEP classification

  • OECD FORD branch

    20101 - Civil engineering

Result continuities

  • Project

    <a href="/en/project/TN02000009" target="_blank" >TN02000009: National Competence Centre for Aeronautics and Space</a><br>

  • Continuities

    P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Others

  • Publication year

    2025

  • Confidentiality

    C - Předmět řešení projektu podléhá obchodnímu tajemství (§ 504 Občanského zákoníku), ale název projektu, cíle projektu a u ukončeného nebo zastaveného projektu zhodnocení výsledku řešení projektu (údaje P03, P04, P15, P19, P29, PN8) dodané do CEP, jsou upraveny tak, aby byly zveřejnitelné.

Data specific for result type

  • Internal product ID

    FVVPP800

  • Numerical identification

    TN02000009/4-V4

  • Technical parameters

    zdvih válce 220±1[mm] pracovní tlak p = 21 [MPa] provozní teploty -54 až +85 [°C]

  • Economical parameters

    Zvýšení životnosti hydraulického válce umožní navýšení ceny a zvýšení konkurence schopnosti.

  • Application category by cost

  • Owner IČO

    46347071

  • Owner name

    JIHLAVAN, a.s.

  • Owner country

    CZ - CZECH REPUBLIC

  • Usage type

    O - Doposud nevyužívaný výsledek

  • Licence fee requirement

    A - Poskytovatel licence na výsledek požaduje licenční poplatek

  • Web page