• 한국항공운항학회지
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• 제28권1호
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• pp.90-105
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• 2020

This research investigates the export strategy for pioneering a new market of Advanced Pilot Trainer T-50, a business unit of KAI company, and increasing its market share. The export strategy is proposed based on the Corporate Marketing Model along with the market oriented concept. Specific sales strategies are extracted in consideration of product analysis, market analysis, and integration of product and target market. Therefore, six countries in Africa are selected as the primary target markets on account of their market potentials. In addition, T-50 is repositioned to 'T-50Af' as 'high price competitive and multi-role trainer.' The business implications include the expansion of the market in Africa and the pursuit of the consistent development and growth of T-50.

• 한국항공우주학회지
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• 제34권11호
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• pp.70-75
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• 2006

조종실 여압시스템은 압력스케쥴, 압력조절 공차, 정상 및 비정상 작동시의 최대 압력변화율 및 조종실로 유입되는 최대 공기변화량과 같은 설계한계에 적절히 응답하도록 설계하여야 한다. 본 논문에서는 T-50 고등훈련기 조종실 여압시스템에 대한 압력강하 해석과 비행시험결과가 소개되었다. 압력강하 해석을 통하여 여압밸브의 출구면적을 계산한 후 무여압 구간에서의 압력공차를 예측하였다. 예측된 결과를 이용하여 D사의 여압부품을 선정하였고, 예측된 압력공차는 비행시험의 결과와 잘 일치하였다. 결론적으로 비행시험을 통하여 T-50 고등훈련기 여압시스템이 MIL-E-18927 설계기준을 만족하였다

• 한국복합재료학회:학술대회논문집
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• 한국복합재료학회 2005년도 추계학술발표대회 논문집
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• pp.1-21
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• 2005

• International Journal of Aeronautical and Space Sciences
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• 제8권1호
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• pp.32-45
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• 2007

The T-50 advanced supersonic jet trainer employs the Relaxed Static Stability (RSS) concept to improve the aerodynamic performance while the flight control system stabilizes the unstable aircraft and provides adequate handling qualities. The T-50 flight control laws employ a proportional-plus-integral type controller based on a dynamic inversion method in longitudinal axis and a proportional type controller based on a blended roll system with simple roll rate feedback and beta-betadot feedback system. These control laws are verified by flight tests with various maneuver set flight envelopes and the control laws are updated to resolve flight test issues. This paper describes several concepts of flight control laws used in T-50 to resolve those flight test issues. Control laws for solving the roll-off problem during pitch maneuver in asymmetric loading configurations, improving the departure resistance in negative angle of attack conditions and enhancing the fine tracking performance in air-to-air tracking maneuvers are described with flight test data.

• 항공우주시스템공학회지
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• 제1권3호
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• pp.13-20
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• 2007

The objective of this study is to investigate endurance test of localization part for T-50 aircraft engine. Major localization parts of the engine (F404-STW-102) was performed using Accelerated Simulated Mission Engine Test. The purpose of this test is to evaluate of quality demonstration capability, to verify design of engine localization parts, and to improvement safety and operation rate of T-50 advanced trainer by finding out operational problems in production phase and fixing it.

• 제어로봇시스템학회논문지
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• 제11권11호
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• pp.963-969
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• 2005

An advanced method of Relaxed Static Stability (RSS) is utilized for improving the aerodynamic performance of modem version supersonic jet fighter aircraft. The flight control system utilizes RSS criteria in both longitudinal and lateral-directional axes to achieve performance enhancements and improve stability. The T-50 advanced trainer employs the RSS concept in order to improve the aerodynamic performance and the flight control law in order to guarantee aircraft stability, The T-50 longitudinal control laws employ the dynamic inversion and proportional-plus-integral control method. This paper details the design process of developing longitudinal control laws for the RSS aircraft, utilizing the requirement of MIL-F-8785C. In addition, This paper addresses the analysis of aircraft characteristics such as damping, natural frequency, gain and phase margin about state variables for longitudinal inner loop feedback design.

• 시스템엔지니어링학술지
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• 제5권1호
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• pp.7-20
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• 2009

This paper describes a case study on the R&D programs of fighter and attacker aircraft such as F-22A, F/A-18E/F, and T/A-50. F-22A and F/A-18E/F were developed in same age. The performance of each program was, however extremely different. F-22A program results in a lot of cost overrun and schedule delay. On the other hand F/A-18E/F program met the cost, schedule, and performance goals. In the T/A-50 program with a super-sonic advanced trainer, T-50 was also developed successfully on planned cost and time by Korea Air-force and KAI. This paper derives key elements for the success of the military aircraft R&D program through lessons learned from th e case study. Each program is analyzed in terms of its background, planning and management.

• 항공우주시스템공학회지
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• 제2권3호
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• pp.40-44
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• 2008

T-50 ECS(environment control system) was designed to have freezing protection for the condenser. However during the ground and flight test, the freezing problem was occurred. This paper deals with the analysis of the freezing problem and introduces anti-freezing design using ADI(Active De-Icing) logic to solve the condenser freezing problem of T-50 ECS

• 항공우주시스템공학회지
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• 제3권1호
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• pp.1-5
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• 2009

The flight control of the T-50 advanced trainer is conducted by the digital FBW (Flight-by-Wire) control system. The system input data consist of flight conditions such as altitude, airspeed, and angle of attack. And the flight conditions of the aircraft are obtained from IMFP (Integrated Multi-Function Probe). The T-50 aircraft equip three IMFP sensors. To ensure reliability in flight condition data obtained from each IMFP sensor, the mean value of flight conditions is used as the input of the control system. In this study, the effect of an installation angle of IMFP sensors on estimation of flight altitude was investigated by flight test results in the supersonic region.

• 한국항공우주학회지
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• 제34권2호
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• pp.90-95
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• 2006

T-50과 같이 단발 엔진을 장착한 항공기의 경우, 공중에서 엔진의 재시동 능력은 매우 중요한데, 본 논문에서는 T-50 엔진의 공중재시동 능력을 검증하기 위해 다양한 비행조건에서 수행한 Spooldown 공중재시동과 APU 보조 공중재시동(APU Assisted Airstart) 그리고 자동재점화(Auto-Relight) 공중재시동 시험 결과를 제시하였다. 자동재점화 공중재시동이 실패하기도 했으나, FADEC의 실화감지 스케줄을 수정한 후 재시동에 성공하는 등 계획된 시험은 모두 성공적으로 수행되어 T-50의 우수한 공중재시동 능력을 확인할 수 있었다.