Aviation Division Research Articles

Failure analysis and reliability assessment of a type of aero-engine combustion chamber thermal barrier coatings

During a routine hole probe inspection, the aviation division found that the combustion chamber flame tube of a V2500 aero engine had failed early and that the TBCs around the vent holes on the flame tube liner panel 4 had peeled off over a large area, causing the flame tube liner to burn through. This work studies the premature failure of the V2500 aero-engine flame tube and, using modeling and simulation tests, finds the reason for premature failure as a substantial area of thermal barrier coating peeling owing to sintering. The sintering procedure significantly increases the thermal barrier coating's Young's modulus, which reduces the coating's resistance to thermal mismatch strain. The reliability of the TBCs was then evaluated using a probabilistic approach. Owing to the non-uniformity of temperature distribution induced by the hot airflow, the lifetime of the TBCs in the high temperature region is only around 3000 h, but the lifetime in the low temperature region is at least 25,000 h. Using the method of hole-probing, the values of the calculated and real outcomes are compared. The relative error is less than 5 %, demonstrating that the suggested approach for evaluating dependability has high credibility and applicability.

Study on mechanical properties of epoxy based Kenaf/Banana/Glass fiber hybrid nano composites

The composite materials usually contribute excellent, typical mechanical and physical properties as it combines the reinforcements to obtain the desirable properties while restraining their minimum desirable properties. At present the composite materials assume a huge part in the aviation division, vehicle segment and other connected science applications as they uncover the power level to weight proportion and modulus to weight extent. Elite composites created from glass, kenaf, banana and graphene filaments are utilized in polymeric networks broadly as application in aviation and space vehicle innovation. In the present study, the hybrid nano composite laminates were prepared with different weight percentage of graphene as nano filler and reinforcing material as kenaf, banana and glass fiber with epoxy resin. The results shows that by adding the graphene in epoxy resin improves the mechanical properties of hybrid nano composites and also found that the performance of kenaf/glass fiber hybrid nano composites is better than the banana/glass fiber hybrid nano composites.

Выполнение боевых задач 2-й гвардейской ночной бомбардировочной авиационной дивизией в Крымской наступательной операции 1944 г.

The research objectives are as follows: to identify and systematize types of night bombers combat tasks during the Crimean Offensive Operation (April 8 - May 12, 1944). The article provides examples of combat tasks of the 2nd Guards Night Bomber Aviation Division of the 8th Air Army. The author describes types of combat tasks, staff and dislocation of regiments, reconstructs details of the Crimean Offensive Operation, in which the 2nd Guards Night Bomber Aviation Division participated, wherein lies scientific originality of the study. The research findings are as follows: the author reveals contribution of this combat unit to liberation of the Crimean Peninsula from the German-fascist invaders.

АВИАЦИЯ ВОЙСК ПРОТИВОВОЗДУШНОЙ ОБОРОНЫ СССР В КРЫМСКОЙ НАСТУПАТЕЛЬНОЙ ОПЕРАЦИИ (АПРЕЛЬ – МАЙ 1944 Г.)

The role of the Aviation of the Air Defense Forces of the Soviet Union in the Crimean offensive operation is considered. The composition and structure of aviation units of the air defense forces is presented. The types of combat missions, examples of the heroism of the personnel and the results of participation in the operation are described. The novelty of the study is the systematization of the types of combat missions and activities of three regiments of air defense fighter aviation over the Kerch Strait during the preparation of the operation to liberate Crimea. The article presents archival sources not previously published in scientific papers. As a result of the study, the role of the aviation of the air defense forces and the personal contribution of the pilots of the 2nd Guards Fighter Aviation Division in the liberation of the Crimea from the Nazi invaders have been determined.

Pacific National Industries, Inc.

Eric Walsh, newly promoted director of aviation for Pacific National Industries, Inc. (PNI), is one week away from having to make his very first presentation to the company's COO and CFO. PNI is one of the country's largest chemical companies, and maintained four aircraft and a team of flight and maintenance crewmembers to facilitate executive travel to and from the company's many plants and operating complexes. Walsh enters his new position and learns how badly the aviation division needs updating: the planes need refurbishment or replacement, the staff might need retraining, and PNI has just acquired a new company that comes with its own flight division—so Walsh also needs to figure out how that fleet factors into PNI's existing one, if at all. With only a week left to prepare for his meeting, Walsh must decide where to focus his presentation. Excerpt UVA-G-0646 Apr. 18, 2019 Pacific National Industries, Inc. Eric Walsh walked across the tarmac toward the flight operations building for Pacific National Industries, Inc. (PNI). He had flown PNI COO Dwight Daniels and senior vice president and CFO Meredith Ackerman back from the company's newly acquired agribusiness in Memphis, Tennessee. Daniels and Ackerman had spoken briefly about the meeting next week, wherein Walsh would present the strategic outlook for the flight department. That meeting was weighing heavy on Walsh's mind. He had been promoted to director of aviation following former director Kevin McNamara's retirement. McNamara had been comfortable with the status quo, and the department now needed a major overhaul, according to the results of an outside consulting report. The Company PNI was one of the nation's largest chemical companies, producing and marketing chemicals, fabricated fibers, explosives, propellants, and agricultural products. PNI's goods were used in a broad range of industries throughout the world. With 2018 sales expected to exceed $ 20 billion, PNI was ranked among Fortune's 200 largest US corporations. . . .

Evaluation of Pavement Preservation and Maintenance Activities at General Aviation Airports in Texas

General aviation (GA) airports play an important role in the national transportation system by accommodating emergencies and providing for agricultural, recreational, and other operations. GA airports account for almost 90% of the airports in the Texas Airport System Plan. To protect their initial investment in asphalt and concrete pavements, GA airports are expected to perform routine pavement maintenance. For this case study of pavement maintenance practices at GA airports in Texas, GA airport managers were contacted and interviewed about treatments used at their facilities and about the process of having the work done. Respondents were asked to rank the effectiveness of specific maintenance treatments for asphalt and concrete pavements on a Likert-type scale, as well as marking type, retexturing methods, and rubber and contaminant removal methods. Information about the level at which pavement maintenance decisions were made, the process, and the additional data desired (specifically about pavements) was obtained through open-ended questions. The results show that crack sealing and slurry sealing are the two most commonly used maintenance treatments—in a reactive manner. The results also indicate that most GA airport managers rely on the Aviation Division of the Texas Department of Transportation or an engineering firm to manage the airfield pavement and do not take an active approach to implementing routine preventive maintenance. This reliance was the result of two factors: (a) level of knowledge, of both the airport managers and those approving funding, and (b) availability of funding. Opportunities for cooperation and education to address deficiencies exist within the current system.

Estudios de investigación en accidentalidad aérea y estudios de casos en el área de Aviación Policial 2007-2011

This article is intended results of o researching project, carried out at aviation division of Colombian Policie. The purpose was to perform a case study about air incidents and crashes in the improvement of manuals and protocols of security in aeronautic field that are being developed in Colombian National Policie.The product was developed under a research training context, reflective, participative, descriptive and improvement, thats way it was designed through qualitative investigation model, making an information tracking and documentary analysis, the findings show that air accidentality requires a special treatment in the aviation area of National Police, it's necessary implement strategies that allow reinforce air security with a special emphasis in prevention. Give that responsible authors are involved within the chain of providing service in aviation, such as the maintenance an o aircraft operation

Better Trauma Care. How Maryland Does It

In March, 1970, the Maryland State Police, in cooperation with the University of Maryland, started the first statewide airborne transportation system. It was modeled after the army's success in Korea and Vietnam, where battlefield injuries were flown to front-line MASH units. The world's premier statewide medical aviation division was made possible through a cooperative effort between the Maryland State Police Aviation Division and Dr. R Adams Cowley at the University of Maryland Hospital as a public service to the citizens of the state. The Maryland Institute for Emergency Medical Services Systems (MIEMSS) has five components: (1) aircraft, (2) state troopers, (3) system communications (SYSCOM) center, (4) ambulance and fire emergency rescue, and (5) Level I adult and pediatric trauma centers and a regional burn center. The Maryland State Police Aviation Division now has 12 Aerospace Dauphin AS365N helicopters that operate out of eight fixed points throughout the state. Each helicopter has a two-person crew that consists of a pilot and a paramedic. Since 1993, the overall coordination of emergency medical services (EMS) has been under the purview of MIEMSS, an independent executive-level state agency that is governed by an appointed board and advisory council. To ensure stable funding for Maryland's world renowned emergency medical services (EMS) system, including med-evac helicopters, ambulances, fire equipment, rescue squads, and trauma units, a "surcharge" of $13.50 per year is collected with the automobile registration fee where applicable. The SYSCOM center in Baltimore coordinates the helicopter transport to the scene of the accident as well as referral to the specialty care facility: Adult Level I Trauma Center, Pediatric Level I Trauma Center, and Regional Burn Center. An on-the-scene evaluation of this exemplary emergency medical system in Maryland provides further convincing evidence of the performance of the Maryland State Police Aviation Division as they transported an injured child to the Johns Hopkins Pediatric Level I Trauma Center. It is our belief that the model emergency medical system in Maryland, if replicated throughout our nation, would save the lives of the critically injured.

Maryland State Police Aviation Division. A model emergency medical system for our nation.

This collective review has the following purposes. First we will describe each of the components of the Maryland State Police Aviation Division. We will then provide detailed information about the Atlas and Database of Air Medical Services (ADAMS) compiled by the center for transportation and injury research (Buffalo, New York) in alliance with the Association of Air Medical Services (Alexandria, Virginia) that provides a unique opportunity for each state to evaluate the comprehensive nature of their air medical services. The concept "the golden hour" has been molded into the world's premier public service aviation unit, which has proudly served the citizens of Maryland for over 24 years. This effort was initially made possible through a cooperative effort between the Maryland State Police Aviation Division and Dr. R Adams Cowley at the University of Maryland Hospital as a public service to the citizens of the state. This arrangement added a unique, economical, and life-saving component to the regionalized Emergency Medical Services and Critical Care system coordinated by the Maryland Institute for Emergency Medical Services Systems (MIESS). The Maryland State Police Aviation Division has four components: (1) aircraft, (2) state troopers, (3) system communications (SYSCOM) center, and (4) level I adult and pediatric trauma centers, as well as a regional burn center. ADAMS is a compilation of information of Air Medical Services in the United States to respond to traumas and other emergencies. Specifically, ADAMS provides descriptive and geographic information on Air Medical Service base locations, communication centers, rotor wing (RW) assets, and the major hospitals and transports that receive scene transports. The database includes all types of provider organizations including nonprofit, commercial, and public service (fire, police) air medical service providers, as well as several military units that routinely provide transport in remote areas. ADAMS provides national and statewide maps indicating air transport systems, trauma centers, and geographic population density. To provide a greater perspective on emergency medical care in individual states using the carefully tabulated ADAMS data, we compared the air emergency medical systems in Maryland to those of Oregon. Regardless of population density, Maryland provides air medical transport throughout the entire state, with the exception of only three small geographic areas. Maryland's 15 helicopter bases provide quick access for the seriously injured patient to either a Level I or pediatric trauma center within the "golden hour." In contrast, the air medical transportation system in Oregon is restricted to only three small geographic regions, making it an invitation to death for many seriously injured patients. It should be a federal mandate that the injured patient should gain access either by air transport or ambulance service to a Level I trauma center within that "golden hour." This federal legislation should include new criteria to initiate the dispatch of a helicopter to the scene of an accident or injury.

Differences in Mortality Rates Among Trauma Patients Transported by Helicopter and Ambulance in Maryland

A comprehensive state-wide emergency medical services and helicopter transport system has been developed in the State of Maryland on the principle that early definitive care improves patient outcomes. The purpose of this study was to determine if empirical data exist to support the theory that air medical transportation services provided by the Maryland State Police (MSP) Aviation Division contribute to an improved trauma patient survival rate in Maryland. A retrospective study was conducted on the records of all patients transported by helicopter or ground ambulance and admitted to the R Adams Cowley Shock Trauma Center (STC) of the University of Maryland Medical System. Data were obtained from the Maryland Institute of Emergency Medical Services Systems (MIEMSS) Shock Trauma Clinical Registry for the period January 1988 through July 1995, covering 23,002 patients. Patients included those transported directly from the scene of injury to the STC as well as those from interfacility transfers. All patients were stratified by injury severity and compared by outcome (mortality) using Mantel-Haenszel statistics. During the study period, 11,379 patients were transported by ground and 11,623 were transported by MSP helicopter. The mean Injury Severity Score (ISS) for patients transported by ground was 12.7 (SD = 12.52) and the mean ISS for patients transported by air was 14.6 (SD = 13.42), p < 0.001. Among patients classified as having a high index of injury severity, the mortality rate was lower among those transported by MSP helicopter than among those transported by ambulance. The mortality rate was significantly lower for air transported patient with an ISS higher than 31. The State of Maryland has demonstrated a commitment to its citizenry and invested heavily in its public safety air medical service. This study suggests the rapid air transport of victims of traumatic events by specialized personnel in Maryland has a positive effect on the outcome of severely injured patients. Further research is necessary to clarify the causal relationships in order to more fully elucidate the value of this resource.

Contracts

Hunting plc's Aviation Division has secured a contract with Bombardier's de Havilland Inc. to supply complete aircraft interiors for the Dash 8 series of turboprop commuter airliners.

Dunlop Aviation Commitment to Quality Ensures Aircraft Reliability &amp; Safety

“ALL employees of Dunlop Aviation Division are totally committed to providing products and services which meet the needs and requirements of the Company, it's customers and the certificating authorities.

IAC Completes Engine Test Facility For Helikopter Service

ENGINE testing and health monitoring has rapidly become a key element in the specialised customising, maintenance and overhaul services provided by Helikopter Service AS of Norway — one of the world's largest private helicopter operators. The Aviation Division of Industrial Acoustics Company (IAC) of Staines, Middx, UK has just completed a major project to design and construct a helicopter engine test facility for the company at its Stavanger site. The new facility is capable of testing any helicopter engine up to 5000 horsepower, and is the first to be built to give this level of flexibility across so many engine types.

People

Dunlop Aviation Division based in Coventry, announces with immediate effect, the following management Committee appointments:‐

Modern Cabin Furnishing

Aim Group plc, the International Aircraft Interior Manufacturing Group, has, within its Aviation Division a number of companies who are making a significant contribution to the design, development and manufacture of modern cabin furnishings.

Technical Advances in Tyres, Wheels and Brakes

FOLLOWING its acquisition by BTR the aerospace activities of Dunlop have been reorganised and now include the Aviation Division in Coventry the Aircraft Tyres Division in Birmingham, the Precision Rubber Division and Serek Aviation. All manner of design and development work can be undertaken relating to tyres, wheels, brakes, brake management systems and the many hydraulic, pneumatic and electronically controlled systems manufactured by the company. This work is greatly helped by the comprehensive range of testing facilities available and the instrumentation and analysis equipment for a wide variety of aircraft components.

Composite Developments

INCORPORATING Tenmat ‘Feroform’ bushes in their construction, carbon brakes, designed and manufactured by Dunlop Aviation division at Coventry, are fitted to the Boeing 757 aircraft of Royal Brunei, Delta, Royal Air Maroc and Northwest Orient airlines, as well as being on order for Air Holland and CAAC of China. This type of brake has wide applications and makes use of expertise gained in both the civil and military fields over a number of years. Concorde and AV‐8B are two examples and in the future, carbon brakes are scheduled to be fitted to the French/Italian ATR‐72.

Dunlop Aviation Spreads its Wings

The take‐off of a Boeing 757 at Seattle recently, the first fitted with lightweight, high technology carbon brakes, was a significant step for Dunlop Aviation Division, and heralds a new era for the Coventry‐based operation.

Dunlop Commissions £1M Aircraft Wheel Roll Machine

Dunlop Aviation Division has put into operation a new aircraft wheel roll machine at its Coventry site, a project which is valued at nearly £1 million.

The problems of research and development cost prediction in an avionics supply company

Although this paper is intended to contribute to the symposium a view on the subject from within a major equipment supplier to the aerospace industry, the views expressed, whilst based on experience gained from working within the Aviation Division of Smiths Industries at Cheltenham are my own, and do not necessarily represent those of the Company.'Avionics’ is used in the title for brevity, although if one accepts the definition of avionics as being the application of electronics to airborne systems and equipment, it does not strictly cover the whole range of products with which Smiths Industries Aviation Division at Cheltenham is concerned. However, since electronics form the major part of Head Up Displays and Flight Control Systems, and an increasing proportion of Flight Deck Instruments and Components, it is the most convenient generic term.