• Title, Summary, Keyword: Pilot test

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A Study on the Aptitude Test of Helicopter Pilots - Based on the Diagnostic Model - (헬리콥터 조종사의 적성검사에 관한 연구 - 진단 모형을 중심으로 -)

  • Kim, Jong-Pil;Kim, Sang-Chul;Seol, Hyeonju
    • Journal of the Korean Society for Aviation and Aeronautics
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    • v.28 no.3
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    • pp.74-83
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    • 2020
  • Securing excellent pilots is not only directly linked to the military's improved combat capabilities, but also a way to minimize human and property losses from aircraft accidents. Therefore, a scientific method is needed to diagnose pilot aptitude from the pilot selection process and select those with high accident potential, those who are dropped out of the flight training process, and those who are not suitable for pilot life in advance. Developed countries have implemented pilot aptitude tests to solve these problems early on, but so far, the Korean Army has not introduced a pilot aptitude test system that uses diagnostic tools in the helicopter pilot selection process. Therefore, in this study, scientific diagnostic tools are developed for selecting helicopter pilots, and through this, it is predicted that the number of people who are likely to be dropped out of the training course and who have the potential for accidents will be selected in advance and eliminated in the selection process. In this context, prior research examined the key factors involved in the pilot aptitude test. Through this, the aptitude test items were developed and aptitude tests were conducted on student pilots currently in flight training, and the results of flight training were analyzed.

Comparison to Automobile Pilot Lamp by Accelerated Life Test (가속수명시험을 통한 자동차용 파일럿램프의 비교평가)

  • Shin, Min-Gyung;Wei, Shin-Hwan;Kim, Hyung-Min
    • Journal of Applied Reliability
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    • v.8 no.2
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    • pp.75-85
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    • 2008
  • In this paper, we compared domestic with foreign pilot lamps installed on the instrument board or electronic modules (car audio, air-conditional system, etc.) of an automotive vehicle by an accelerated life test in order to estimate the life of domestic pilot lamps. An accelerated life test method was developed and the relation of the life and voltage stress was analyzed. The main results are as follows; i) $B_{10}$ life of pilot lamp is above 5,000 hours, vehicle travel time for 10 years. ii) the life of domestic pilot lamp is longer than that of foreign thing. iii) the life distribution of domestic pilot lamp is wider than that of foreign thing. iv) it is possible to promote import replacement of automobile pilot lamp.

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Validity Study of Questionnaire Items of the Pilot Aptitude Personality Test (조종적성인성검사 문항개발 타당도 연구)

  • Yoon, Youkyung;Park, Seikwon
    • Journal of the Korean Society for Aviation and Aeronautics
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    • v.26 no.2
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    • pp.31-38
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    • 2018
  • The pilot aptitude test so far has been conducted with a dichotomous concept of cognitive factor and non-cognitive factor, so it was not easy to explain concrete factors about pilot aptitude. Therefore, an integrated approach is needed to construct pilot aptitude test including all factors that can predict pilot aptitude. In previous study, we developed questionnaire items for the Pilot Aptitude Personality Test(PAPT) which can predict the flight training achievement through personality and personal characteristics. And those items were categorized as personality, cognition, and motivation factors. The flight training grades were correlated with all the test factors of the items, and the cognitive factors were high. As a result of the regression analysis, the total score of the three factors together accounted for 16% of the flight training grades. The results of the ANOVA showed that the cognition factors and motivation factors had significant effects on the completion of the flight training. The factors of PAPT predicted not only the completion of the flight training but also the flight performance. This is because the existing paper-pencil pilot aptitude test can only discriminate the flight training completion status. This is also a result of the fact that the introductory flight training consists of various factors including not only basic cognition but also personality and motivation.

Experiments of Combustion Vibration in the Pilot Furnace for Fossil Power Plant under Combustion Test (I) (화력 발전용 시험연소로의 연소시험 중의 연소진동 실험(I))

  • Ju, Young-Ho;Kim, Cheol-Hong
    • Proceedings of the Korean Society for Noise and Vibration Engineering Conference
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    • pp.341-344
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    • 2004
  • This paper presents results of test for combustion vibration in the pilot furnace for fossil power plant under combustion test. We measured static pressure variation in the pilot furnace together with air and fuel flow. From test results, it shows that vibration magnitude is affected by air and fuel flow. Also, a finite element analysis using a commercial S/W is performed to calculate acoustic mode of the pilot furnace. These results show that dominant frequency occurred is related to acoustic natural frequency of furnace. After this, it needs to be studied the relation between dominant frequency of combustion vibration and air flow rate.

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The Development of an Instrument for the Measuring Cognitive Conflict Levels of Elementary Students Confronted with an Anomalous Situation in Science Learning (과학학습에서 불일치 상황에 대면한 초등학생의 인지갈등 측정 도구 개발)

  • 박상석;이경호;김정환;권혁구;권재술
    • Journal of Korean Elementary Science Education
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    • v.18 no.2
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    • pp.21-33
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    • 1999
  • The purpose of this study was to develop an Instrument for the Measurement of Cognitive Conflict Levels of students who confronted with an anomalous situation in science teaming. Anomalous situation is generated when students' prediction is disconsistent with the observed fact. In this study, the researchers identified 4 components of cognitive conflict and developed three items for each component. The items were developed and revised by four pilot tests. In the first pilot test, 55 elementary school students participated in the test In the second pilot test, 88 students of the 5th and 6th grader participated in the test. The instrument of measuring cognitive conflict levels was given to the subjects right after demonstrating anomalous situation. For the demonstration, two different problem situations were developed: one was a pulley problem and the other was electric bulbs in parallel. Answered reasons for each items were analyzed to assess students' understanding on each items. In third pilot test, 125 elementary school students participated in the test. A factor analysis of the responses was carried out and reliability of the test was assessed by calculating internal consistency values. The items were finalized by three pilot tests. After 1 month after the third pilot test, researchers conducted the finalized test items to 323 students of the 5th and 6th grader. The final instrument showed moderate reliability (Cronbach-α 0.82∼0.87) and good content validity(0.93). A factor analysis of the response was carried out. 4 main factors completely coincided with 4 components that we supposed to be the conducts of cognitive conflict. The instrument can provide a means for both teachers and researchers to assess the cognitive conflict of a large number of students within a single class period. The results can be used by teachers to better understand the process of conceptual change of their students and to match instruction and materials accordingly.

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Combined De-NOx Process with $NH_3$ SCR and Non-thermal Plasma Process for Removing NOx and Soot from Diesel Exhaust Gases

  • Chung, Kyung-Yul;Song, Young-Hoon;Oh, Sang-Hoon
    • Journal of Advanced Marine Engineering and Technology
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    • v.27 no.5
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    • pp.657-665
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    • 2003
  • Combined De-NOx Process in which $NH_3$ SCR (Selective Catalytic Reduction) and non-thermal Plasma Process are simultaneously used, has been investigated with a pilot test facility. The pilot test facility treats the combustion flue gases exhausted from a diesel engine that generates 240 kW of electrical power. Test results show that up to 80 % of NOx (NO and NO2) can be removed at 100 - $200^{\circ}C$. None of conventional De-NOx techniques works under such low temperature range. In addition to NOx. the Pilot test results show that soot can be simultaneously treated with the present non-thermal plasma technique. The present pilot test shows that the electrical power consumption to operate the non-thermal plasma reactor is equivalent to 3 - 4 % of the electrical power generated by the diesel engine.

Comparison of the ability of Reciproc and Reciproc Blue instruments to reach the full working length with or without glide path preparation

  • Adiguzel, Mehmet;Tufenkci, Pelin
    • Restorative Dentistry and Endodontics
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    • v.43 no.4
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    • pp.41.1-41.7
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    • 2018
  • Objectives: The purpose of the present study was to compare the mean preparation times and frequency with which Reciproc and Reciproc Blue instruments reached the full working length in mandibular molars, with or without glide path preparation. Materials and Methods: Previously untreated mesiobuccal and mesiolingual canals with completely formed apices were randomly divided into 6 groups (n = 50) depending on the usage of Reciproc (RC; VDW), Reciproc Blue (RC Blue; VDW), C-Pilot (CP; VDW), and R-Pilot (RP; VDW) files: RC, RC Blue, RC + C-Pilot (RC-CP), RC-Blue + C-Pilot (RC Blue-CP), RC+R-Pilot (RC-RP), and RC Blue + R-Pilot (RC Blue-RP). A glide path was prepared using the hand-operated C-Pilot or the machine-operated R-Pilot instruments, respectively. The ${\chi}^2$ test, analysis of variance, and the Tukey post hoc test were used for statistical comparisons. Results: No statistically significant differences were observed in the distribution of the frequency of reaching the full working length in the RC (94%), RC Blue (88%), RC-CP (94%), RC Blue-CP (90%), RC-RP (96%), and RC Blue-RP (92%) groups (p > 0.05). Conclusions: Preparation of a glide path did not have a significant effect on reaching the full working length using these systems.

Development of Questionnaire Items of Personality Test for the Pilot Aptitude (조종적성인성검사 문항개발 연구)

  • Park, Seikwon;Lee, Seungwon;Yoon, Youkyung
    • Journal of the Korean Society for Aviation and Aeronautics
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    • v.24 no.4
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    • pp.62-69
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    • 2016
  • The purpose of this study is to develop questionnaire items for the Pilot Aptitude Personality Test(PAPT) which can predict the flight training achievement through personality and personal characteristics. To do this, we investigated the personality traits required to successfully conduct flight training for 30 flight instructors as a subject. The results were as follows: motivation, concentration, concentration, situational awareness, and concentration. Based on this, preliminary 300-item questionnaire was prepared by combining the existing studies related to pilot aptitude. Survey was conducted using preliminary questionnaire for 152 student pilots as a subject. As a result of the correlation analysis between the results of the questionnaire and the flight training, 16 questions were derived. Finally, factor analysis showed that the final 14 questionnaire items were confirmed. The internal concept of an item is categorized as personality, perception, and motivation. This study suggests that the pilot aptitude should be viewed from an extended point of view by analyzing individual characteristics and pilot aptitude in relation to flight training achievement.

Face Validity Analysis of Revised English Proficiency Test for Aviation (EPTA) - Based on the Pilot's Flying Experience - (개정된 항공영어구술능력시험(EPTA)의 안면타당도 분석 - 조종사의 비행경력을 중심으로-)

  • Choi, Kyung Ho;Kim, Soo-Yoon
    • Journal of the Korean Society for Aviation and Aeronautics
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    • v.28 no.4
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    • pp.12-20
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    • 2020
  • The purpose of this study was to analyze the face validity of the revised EPTA (English Proficiency Test for Aviation) to see if the tests actually contribute to the enhancement of aviation safety and achieve the purpose of the assessment. In order to reach the above objectives, 103 pilot test takers were surveyed, and nine in-depth interviewees were selected and interviewed. In addition, detailed research results were derived by dividing the participants into the pilot's flight experience (31 captain pilots, 42 first officer pilots, and 30 general commercial pilots). As a result, pilot participants were generally aware that EPTA was more reasonable because the revised EPTA properly implemented the aviation situation and gave participants motivation to learn aviation English. It was also seen that first officer pilots had a higher face validity of EPTA than captain and general commercial pilots. The reason was that first officer pilots considered air traffic control job was more important than other pilots did.

Fundamental Experiment of Dynamic Response for LNG Pilot Tank (LNG Pilot 탱크의 동특성 실험)

  • 임윤묵;김문겸;조경환;박수용
    • Proceedings of the Earthquake Engineering Society of Korea Conference
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    • pp.489-496
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    • 2003
  • Korea Gas Corporation has recently constructed a LNG pilot tank with 1, 000㎥ capacity in Incheon, Korea. The main objective of this pilot tank construction is to accumulate field data under different operating conditions for the future use in design procedure, construction, and maintenance. As the part of the project, a field dynamic test, so-called modal test, is performed to obtain the dynamic characteristics of the pilot tank. This paper describes the instrumentation and measurement Process used in the testing. From the measured Frequency Response Functions (FRFs), resonant frequencies and corresponding mode shapes of the tank are extracted and provided. Also, these results are compared to those calculated from a finite element model. The change of dynamic characteristics of the pilot tank due to the effect of internal fluid and the possible structural deterioration will be investigated in near future.

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