INCAS BULLETIN, Volume 12, Issue 4/ 2020, pp. 249 – 259 (P) ISSN 2066-8201, (E) ISSN 2247-4528 Research on the nose landing gear of a military training aircraft Ilie NICOLIN 1 , Bogdan Adrian NICOLIN* ,1 *Corresponding author 1 INCAS – National Institute for Aerospace Research “Elie Carafoli”, B-dul Iuliu Maniu 220, Bucharest 061126, Romania, nicolin.ilie@incas.ro, nicolin.adrian@incas.ro* DOI: 10.13111/2066-8201.2020.12.4.23 Received: 30 June 2020/ Accepted: 12 October 2020/ Published: December 2020 Copyright © 2020. Published by INCAS. This is an “open access” article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/) International Conference of Aerospace Sciences “AEROSPATIAL 2020”, Virtual Conference 15-16 October 2020, Bucharest, Romania, Section 5 - Systems, Subsystems and Control in Aeronautics Abstract: This paper presents the analysis of the landing gear configurations and the proposal of a solution for a military training aircraft. The paper presents both landing gears: nose and main because they are inextricably linked. The nose landing gear of military aircraft is a complex system composed of structural elements, electric and hydraulic components, energy absorption components, aircraft tire wheels etc., which is dimensioned according to the weight of the aircraft. Additional components attached to the nose landing gear include a landing gear extension and retraction mechanism and a steering system. The landing gear must withstand the weight of the aircraft in all phases of take-off (maximum weight: fuel, armament, ammunition, other equipment, flight crew etc.) and landing (impact from landing and a lower weight after completing the mission due to fuel consumption and ammunition use). Key Words: Nose landing gear, main landing gear, steering system, extension and retraction mechanism 1. INTRODUCTION Military aircraft can be of various types (see Figure 1): • Attack aircraft; • Bombing aircraft; • Air combat aircraft; • Aircraft for electronic warfare; • Aircraft with early warning and control systems; • Air transport aircraft for military troops or equipment; • Multi-role combat aircraft; • School and training aircraft. Military aircraft are equipped with a tricycle landing gear (a nose landing gear and two main landing gear positioned left and right under the wings) in a strongly reinforced area. The nose landing gear of military aircraft is a complex system composed of structural elements, electric and hydraulic components, energy absorption components, aircraft tire wheels etc.,