Download or read book Near Midair Collisions as an Indicator of General Aviation Collision Risk written by H. Paul Shuch and published by . This book was released on 1990 with total page 234 pages. Available in PDF, EPUB and Kindle. Book excerpt: "Conventional wisdom suggests aircraft midair collisions to be random events, governed by the laws of Brownian Motion, and best analyzed by stochastic methods. An alternative hypothesis, that such accidents are deterministic in nature, and that specific factors leading to midair collisions can be identified and mitigated, forms the basis for this Dissertation. A predictive model using case control theory is developed for assessing Risk Index, a criterion measure of midair collision likelihood, for any General Aviation flight, actual or hypothetical. Generating the model requires statistical validation of two independent near midair collision databases, and identifying within them those aircraft, aircrew and airspace characteristics most closely associated with collision risk. Calibration of the model shows reality to fall somewhere between the stochastic and deterministic assumptions. A statistically significant correlation is found between predicted and observed Risk Index for a sizable random sample of flights, with a resulting Coefficient of Determination of 0.25. This suggests that we have identified 25% of the source of variance in midair collision risk, the remaining 75% being random. Therefore we can realistically hope to reduce midair collisions by roughly 25%. Strategies for mitigating the identified causal factors are proposed. Measures to reduce the random, remaining 75% of collision risk are also explored. However, these appear to require a significant overhaul of Air Traffic Control procedures, which must be approached with caution, to guard against the attendant possibility of curtailing capacity in the Air Transportation System."--Page 1-2

Download or read book Near Midair Collisions as an Indicator of General Aviation Collison Risk written by H. Paul Shuch and published by . This book was released on 1990 with total page 462 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Near Midair Collision Report of 1968 written by United States. Near Midair Collision Study Group and published by . This book was released on 1969 with total page 216 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Air Traffic Control written by United States. General Accounting Office and published by . This book was released on 1989 with total page 36 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Midair Collisions in U S Civil Aviation 1968 written by and published by . This book was released on 1969 with total page 104 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Scientific and Technical Aerospace Reports written by and published by . This book was released on 1991 with total page 912 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Midair Collisions in U S Civil Aviation 1968 written by United States. National Transportation Safety Board and published by . This book was released on 1969 with total page 104 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book To See Or Not to See written by and published by . This book was released on 1975 with total page 16 pages. Available in PDF, EPUB and Kindle. Book excerpt: The medical records of airmen involved in midair collisions from 1970 through 1973 were reviewed and compared with two other groups of pilots: (1) pilots involved in other types of accidents and (2) pilots without any accident records. There is nothing in the results to indicate that the pilots with visual corrections are a greater risk.

Download or read book Aircraft Collision Models written by Shinsuke Endoh and published by . This book was released on 1982 with total page 196 pages. Available in PDF, EPUB and Kindle. Book excerpt: Introduction: The threat of midair collisions is one of the most serious problems facing the air traffic control system and has been studied by many researchers. The gas model is one of the models which describe the expected frequency of midair collisions. In this paper, the gas model which has been used, so far, to deal only with simple cases is extended to a generalized form, and some special types of collision models, such as the overtaking model, are deduced from this generalized model. The effects of the probability distributions of aircraft direction and altitude on the frequency of collisions are also analyzed. The results in this paper can be applied to evaluate the frequency of conflicts as well as that of collisions. In this paper, an aircraft is represented as a circular cylinder, and a collision is described as an overlap of two cylinders. If the size of the cylinder is expanded to the volume of the protected airspace of an aircraft, an overlap of two cylinders means a conflict. Therefore, with a slight modification, the results can be used to analyze the frequency of conflicts. This flexibility gives the models of this paper an important potential for application to a future air traffic control system. The FAA is currently developing a new type of air traffic control system called AERA (automated en route air traffic control). AERA is expected to reduce the workload of human controllers and expand the capacity of airspace using new computer systems and better communication links. When this system is fully implemented, aircraft will be able to fly under fewer restrictions. However, if many aircraft are flying on random routes, the frequency of potential conflicts the computer system should handle becomes high. Therefore, the frequency of potential conflicts under various circumstances should be calculated in order to estimate the computer workload before full implementation of the system. The models developed in this paper may be helpful in this evaluation. The consequences of actual collisions are, of course, grave. Fortunately, the average number of such collisions per year has remained relatively small. According to an FAA Report (Report of the FAA Task Force on Aircraft Separation Assurance, Jan. 1979), the average number of midair collisions reported to NTSB from 1974 through 1978 was 33 per year. Most midair collisions have occurred between small general aviation aircraft operating under VFR. However, the report also states that there were 227 near midair collision reports in 1975 alone, and that air carriers were involved in 68 of these cases. (According to the report, a near midair collision is an incident which would probably have resulted in a collision if no action had been taken by either pilot. Closest proximity of less than 500 ft would usually be required for a near midair collision report.) Although the number of conflicts is not available in the report, it is clearly far greater than the number of near midair collisions considering the difference of airspace volumes involved. The outline of this thesis is as follows. In Chapter 2, we present an overview of two aircraft collision models, the Reich model and the gas model, which have been the most important ones in this field. In Chapter 3, we develop some extensions of the gas model including a generalized two-dimensional gas model, an overtaking model and a three dimensional gas model. In Chapter 4, we develop an aircraft collision model which does not assume the uniformity of aircraft distribution. The conclusions of this thesis are summarized in Chapter 5.

Download or read book Collision Avoidance and Pilot Warning Indicator Systems written by United States. Congress. Senate. Committee on Commerce. Aviation Subcommittee and published by . This book was released on 1973 with total page 280 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Collision Avoidance and Pilot Warning Indicator Systems Hearings Before the Subcommittee on Aviation 92 2 on S 2264 December 1 1971 and February 29 1972 written by United States. Congress. Senate. Commerce and published by . This book was released on 1972 with total page 408 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Report of the Interagency Near Midair Collision Working Group written by and published by . This book was released on 1989 with total page 62 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book To See Or Not to See written by and published by . This book was released on 1975 with total page 16 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Congressional Record written by United States. Congress and published by . This book was released on 1971 with total page 1218 pages. Available in PDF, EPUB and Kindle. Book excerpt: The Congressional Record is the official record of the proceedings and debates of the United States Congress. It is published daily when Congress is in session. The Congressional Record began publication in 1873. Debates for sessions prior to 1873 are recorded in The Debates and Proceedings in the Congress of the United States (1789-1824), the Register of Debates in Congress (1824-1837), and the Congressional Globe (1833-1873)

Download or read book Why Airplanes Crash written by Clinton V. Oster and published by New York : Oxford University Press. This book was released on 1992 with total page 217 pages. Available in PDF, EPUB and Kindle. Book excerpt: With the deregulation of commercial airlines in 1978, the United States airline industry has changed dramatically. Route entry and exit flexibility, as well as fare setting have stimulated competition, forcing airlines to emphasize cost control, increased productivity, and effective marketing. How have these changes in both public and private policies influenced airline safety? Do airplanes have more accidents now than ever before? This work examines the causes of airplane accidents and what private and public policies are needed to improve aviation safety. It begins by examining the safety record of the United States commuter airline industry in the post-deregulation era characterized by increased emphasis by airlines on cost control and growing pressures on the air traffic control and airport system. The authors go beyond the safety of the scheduled airlines to examine the reasons for accidents in the nonscheduled and general aviation segments of the United States industry, where the bulk of fatalities occur and where airline pilots increasingly receive most of their training and experience. They then turn to an examination of aviation safety throughout the world, first with a detailed comparison of Canadian and American aviation safety, and then with a look at air safety in all regions of the world and the safety performances of all the world's major airlines. Three emerging issues are then examined in greater detail: assessing the margin of safety, worldwide aging of all airline fleets, and terrorism. Clearly written, this careful and systematic analysis of well over 15,000 individual aviation accidents will provide greater insight for government officials, aviation industrymanagers, and researchers, as well as laypeople and other frequent flyers.

Download or read book Investment in the Nation s Air Transportation System written by United States. Congress. Joint Economic Committee and published by . This book was released on 1988 with total page 192 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Aviation safety written by United States. Congress. House. Committee on Public Works and Transportation. Subcommittee on Investigations and Oversight and published by . This book was released on 1988 with total page 930 pages. Available in PDF, EPUB and Kindle. Book excerpt: