Your Selections

Boeing Commercial Airplanes
Show Only

Collections

File Formats

Content Types

Dates

Sectors

Topics

Authors

Publishers

Affiliations

Events

 

A New Vision for Development Assurance Guidance

Boeing Commercial Airplanes-David Merdgen
Gulfstream Aerospace Corp-Andrew Wallington
Published 2017-09-19 by SAE International in United States
In the last several years, technical advances and regulatory pressures have motivated the need for flexible, simple, and performance-based solutions for conducting development assurance in support of a system safety assessment process. Additionally, the affected design space for commercial vehicles has been growing beyond the conventional regulations for airplanes, rotorcraft, engines, and propellers, addressed by current Aerospace Recommended Practices (ARPs). This space is beginning to include commercial technologies such as unmanned aerial systems, multi-stage spacecraft systems, and road-able aircraft. These developing areas are each accompanied with their own development assurance expectations in support of their safety criteria. Concurrently, the industry and regulators are working to simplify guidance for system safety and development assurance, which has been foundational in the aircraft industry for decades. From the 14 Code of Federal Regulations (CFR) Part 23 reorganization to the Streamlining Assurance Process Workshops, the existing regulations and guidance are under pressure to adjust to new expectations within these technical areas. There are several challenges with the existing development assurance guidance which complicates both its application to these new…
Annotation icon
 

Aircraft Thermal Management

Boeing Commercial Airplanes-Mark Ahlers
  • Progress In Technology (PT)
  • PT-177.SET
Published 2016-03-02 by SAE International in United States
This set is comprised of two titles, Aircraft Thermal Management: Systems Architectures and Aircraft Thermal Management: Integrated Energy Systems Analysis both edited by Mark Ahlers.
 

Aircraft Thermal Management: Integrated Energy Systems Analysis

Boeing Commercial Airplanes-Mark Ahlers
  • Progress In Technology (PT)
  • PT-178
Published 2016-03-02 by SAE International in United States
The simultaneous operation of all systems generating, moving, or removing heat on an aircraft is simulated using integrated analysis which is called Integrated Energy System Analysis (IESA) for this book. Its purpose is to understand, optimize, and validate more efficient system architectures for removing or harvesting the increasing amounts of waste heat generated in commercial and military aircraft. In the commercial aircraft industry IESA is driven by the desire to minimize airplane operating costs associated with increased system weight, power consumption, drag, and lost revenue as cargo space is devoted to expanded cooling systems. In military aircraft thermal IESA is also considered to be a key enabler for the successful implementation of the next generation jet fighter weapons systems and countermeasures. This book contains a selection of papers relevant to aircraft thermal management IESA published by SAE International. They cover both recently developed government and industry- funded thermal management IESA such as the Integrated Vehicle Energy Technology (INVENT) program, and older published papers still relevant today which address modeling approaches.
Annotation icon
 

Aircraft Thermal Management: Systems Architectures

Boeing Commercial Airplanes-Mark Ahlers
  • Progress In Technology (PT)
  • PT-177
Published 2016-03-02 by SAE International in United States
Aircraft thermal management (ATM) is increasingly important to the design and operation of commercial and military aircraft due to rising heat loads from expanded electronic functionality, electric systems architectures, and the greater temperature sensitivity of composite materials compared to metallic structures. It also impacts engine fuel consumption associated with removing waste heat from an aircraft. More recently the advent of more electric architectures on aircraft, such as the Boeing 787, has led to increased interest in the development of more efficient ATM architectures by the commercial airplane manufacturers. The ten papers contained in this book describe aircraft thermal management system architectures designed to minimize airplane performance impacts which could be applied to commercial or military aircraft. Additional information on Aircraft Thermal Management System Architectures is available from SAE AIR 5744 issued by the AC-9 Aircraft Environmental System Committee and the SAE book Aircraft Thermal Management Integrated Analysis (PT-178). SAE AIR 5744 defines the discipline of aircraft thermal management system engineering while Aircraft Thermal Management Integrated Analysis discusses approaches to computer simulation of the simultaneous operation…
Annotation icon
 

ERRATUM: Technology Innovations in World War 1 Airplane Design

SAE International Journal of Aerospace

Boeing Commercial Airplanes-Paul Dees
Independent Consultant-Scott Eberhardt
  • Journal Article
  • 2015-01-2581.01
Published 2015-09-15 by SAE International in United States
The original paper published mistakenly did not include Paul Dees, Boeing in the author listing.
Annotation icon
 

Average Probability Calculation Methods for System Safety Analysis

SAE International Journal of Aerospace

Boeing Commercial Airplanes-Anapathur V. Ramesh
  • Journal Article
  • 2015-01-2436
Published 2015-09-15 by SAE International in United States
Fault-tolerance in commercial aircraft applications is typically achieved by redundancy. In such redundant systems the primary component is checked before the start of a flight to see if it operates correctly. The aircraft will not take off unless the primary is functioning. Airplane manufacturers must certify the airplane systems to be safe for flight. One means of safety certification is by safety analysis which shows that the probability of failure in a typical flight is bounded. The probability bound requirement for a system is based on the criticality of system failure.Usually backup components are checked at intervals that span multiple flights. The first backup may be checked more frequently than the second or higher levels. This leads to flights where the system may have latent faults in the backup components. The probability of failure in such cases varies from flight to flight due to the different exposure times for components in the system. So we are led into the concept of “Average Probability of Failure per Flight”.AC/AMC 25.1309 and SAE ARP 4761 document simple formulas…
Annotation icon
 

Panel Assembly Line (PAL) for High Production Rates

SAE International Journal of Aerospace

Boeing Commercial Airplanes-Samuel Dobbs, Brian Stewart
Electroimpact Inc.-Michael Assadi, Sean Hollowell, Joseph Elsholz
  • Journal Article
  • 2015-01-2492
Published 2015-09-15 by SAE International in United States
Developing the most advanced wing panel assembly line for very high production rates required an innovative and integrated solution, relying on the latest technologies in the industry.Looking back at over five decades of commercial aircraft assembly, a clear and singular vision of a fully integrated solution was defined for the new panel production line. The execution was to be focused on co-developing the automation, tooling, material handling and facilities while limiting the number of parties involved. Using the latest technologies in all these areas also required a development plan, which included pre-qualification at all stages of the system development.Planning this large scale project included goals not only for the final solution but for the development and implementation stages as well.The results: Design/build philosophy reduced project time and the number of teams involved. This allowed for easier communication and extended development time well into the project.All design teams (machine, tooling, automation, controls) collocated and worked together on integration during all stages of development and implementation for the highest level of integration.Innovative integration of the tooling and…
Annotation icon
 

Studies of Cloud Characteristics Related to Jet Engine Ice Crystal Icing Utilizing Infrared Satellite Imagery

Boeing Commercial Airplanes-Terrance Tritz, Jeanne Mason, Melissa Bravin, Anna Sharpsten
Boeing-Matthew Grzych
Published 2015-06-15 by SAE International in United States
The significant problem of engine power-loss and damage associated with ice crystal icing (ICI) was first formally recognized by the industry in a 2006 publication [1]. Engine events described by the study included: engine surge, stall, flameout, rollback, and compressor damage; which were triggered by the ingestion of ice crystals in high concentrations generated by deep, moist convection.Since 2003, when ICI engine events were first identified, Boeing has carefully analyzed event conditions documenting detailed pilot reports and compiling weather analyses into a database. The database provides valuable information to characterize environments associated with engine events. It provides boundary conditions, exposure times, and severity to researchers investigating the ICI phenomenon. Ultimately, this research will aid in the development of engine tests and ICI detection/avoidance devices or techniques.This paper first provides a detailed examination of the ICI engine event database from a statistical perspective. Environments sampled during the 2014 HAIC-HIWC field campaign, based in Darwin, Australia, are compared to the ICI engine database and it is shown that test flights fell within the expected range of conditions.…
Annotation icon
 

An Investigation into Location and Convective Lifecycle Trends in an Ice Crystal Icing Engine Event Database

Boeing Commercial Airplanes-Melissa Bravin, Jeanne Mason
Met Analytics Inc.-J. Walter Strapp
Published 2015-06-15 by SAE International in United States
In the last several years, the aviation industry has improved its understanding of jet engine events related to the ingestion of ice crystal particles. Ice crystal icing has caused powerloss and compressor damage events (henceforth referred to as “engine events”) during flights of large transport aircraft, commuter aircraft and business jets. A database has been created at Boeing to aid in analysis and study of these engine events. This paper will examine trends in the engine event database to better understand the weather which is associated with events. The event database will be evaluated for a number of criteria, such as the global location of the event, at what time of day the event occurred, in what season the event occurred, and whether there were local meteorological influences at play. A large proportion of the engine events occur in tropical convection over the ocean. The Japan / South China Sea is shown to be an event-rich area, and hence a detailed analysis will be presented, studying the location of events inside the cloud structure, and…
Annotation icon
 

Automated Floor Drilling Equipment for the 767

SAE International Journal of Aerospace

Boeing Commercial Airplanes-Craig Sylvester
Electroimpact Inc.-Jason Rediger, Joseph Malcomb
  • Journal Article
  • 2014-01-2270
Published 2014-09-16 by SAE International in United States
A new portable floor drilling machine, the 767AFDE, has been designed with a focus on increased reach and speed, ease-of-use, and minimal weight. A 13-foot wide drilling span allows consolidation of 767 section 45 floor drilling into a single swath. A custom CNC interface simplifies machine operations and troubleshooting. Four servo-driven, air-cooled spindles allow high rate drilling through titanium and aluminum. An aluminum space frame optimized for high stiffness/weight ratio allows high speed operation while minimizing aircraft floor deflection. Bridge track tooling interfaces between the machine and the aircraft grid. A vacuum system, offline calibration plate, and transportation dolly complete the cell.
Annotation icon