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New CEC Gasoline Direct Injection Fuels Test – Comparison of Deposits and Spray Performance from New and Used injectors.

Afton Chemical, Ltd.-Jonathan James Pilbeam
  • Technical Paper
  • 2019-28-2392
To be published on 2019-11-21 by SAE International in United States
The use of deposit control additives in European market gasoline is well documented for maintaining high levels of engine cleanliness and subsequent sustained fuel and emissions performance. Co-ordinating European Council (CEC) industry fuels tests have played a crucial role in helping to drive market relevant, effective and low-cost deposit control additives into European market fuels. Until now, there has not been a Gasoline Direct Injection engine test available to fuel marketers in any market globally. However, a new CEC engine test is currently being developed to address that gap. Based on an in-house VW injector coking test, it shows promise for becoming a useful tool with which to develop and measure the performance of deposit control additives. A key requirement of industry tests should be to replicate issues seen in consumer vehicles, thereby providing a platform for relevant solutions. For this paper, injectors from the new VW injector coking test in a clean and coked state were compared to injectors from vehicles in the market in respect of deposit geometry, elemental composition and injector spray…
 

Inspection and Maintenance of In-Use Motor Vehicles – Mitigating Environmental impact

International Centre For Automotive Tech-Aditya Gautam
International Centre For Automotive Tech.-Vijayanta Ahuja
  • Technical Paper
  • 2019-28-2427
To be published on 2019-11-21 by SAE International in United States
The existing rule no. 62 of CMVR, 1989 applies to various commercial vehicles and yet is unable to provide a promising template to have a concise format which will cover all the motor vehicles and their different components with more precise equipment plus virtual testing along with proper management of time during the bulk inspection of all the vehicles. This paper will include all the technicalities and the different course of actions which must be taken into account for the proper implementation of the desired regulations on the designated concern. The idea behind this paper is to have a compact procedural document for the periodical inspection and maintenance of all the motor vehicles running on the Indian Roads that adhere to the basic safety concerns of other on-road vehicles, the pedestrians and the surroundings. Concluding the fact that there are various aspects of environmental degradation henceforth we start by picking one of the hazards trying to execute a method to resolve every respective issue on a micro level, thus eliminating maximum threats onto the environment.…
 

Step & Repeat: Reduce Derivative Aircraft Development Risk with Design Reuse

Mentor-Muhammad Askar
  • Technical Paper
  • 2019-01-1871
To be published on 2019-09-16 by SAE International in United States
Designing derivative aircraft is a complex process with potentially large amounts of program risk. In this paper we present new technologies such as digital interface control documents, and generative design that can transform this process. Employing these types of technologies makes the process more verifiable and repeatable. The paper explains how the technologies can be adopted from the early definition of components & LRUs, to their aggregation into reusable subsystems, as well as the automation and validation processes that can be built around them to reduce the associated complexity and program risk.
 

Reconfigurable Jig Tooling and In-Process Metrology for High Accuracy Prototype Compound Helicopter Wing Assembly

University of Nottingham-Richard J. Crossley, Svetan Ratchev
  • Technical Paper
  • 2019-01-1877
To be published on 2019-09-16 by SAE International in United States
This paper documents the potential use of reconfigurable reusable jig tooling based on the box-joint system for use in the assembly of a prototype compound helicopter wing. Due to the aircraft configuration the wing design is pinned at both ends and therefore requires a higher degree of accuracy (typically 0.2mm), over the 4m length, than conventional wings. In this paper the cost benefit of reusable tooling in a low volume prototype scenario is examined followed by the design of the jig and location features to enable accurate build and metrology documentation. A prototype 4m test jig comprising of commercially available components and bespoke machined ‘pick-ups’ is presented here. Hardware and measurement process cost modelling is documented along with results for the positional and hinge-line concentricity setting accuracy that was achieved using a laser tracking system. Subsequent measurements over a 24hr period are also discussed along with potential sources of the observed reduction in jig accuracy over time.
 
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DESIGN STANDARD, NUT, SELF-LOCKING, ACCESSORY MOUNTING

E-25 General Standards for Aerospace and Propulsion Systems
  • Aerospace Standard
  • AS1050A
  • Current
Published 2019-08-15 by SAE International in United States
No Abstract Available.
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WASHER, KEY - 180 DEG, LOCKING, CRES, UNS S32100

E-25 General Standards for Aerospace and Propulsion Systems
  • Aerospace Standard
  • AS9276B
  • Current
Published 2019-08-15 by SAE International in United States
No Abstract Available.
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NUT, SELF LOCKING - DOUBLE HEXAGON, EXTENDED WASHER, UNS S66286, SILVER PLATED, UNJ THREAD

E-25 General Standards for Aerospace and Propulsion Systems
  • Aerospace Standard
  • AS3477B
  • Current
Published 2019-08-15 by SAE International in United States
No Abstract Available.
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NUT, SELF-LOCKING, PLATE - 2 LUG, FLOATING, COUNTERBORED, UNS S66286

E-25 General Standards for Aerospace and Propulsion Systems
  • Aerospace Standard
  • AS3262B
  • Current
Published 2019-08-15 by SAE International in United States
No Abstract Available.
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WASHER, KEY - 90 DEG, LOCKING, CRES, UNS S32100

E-25 General Standards for Aerospace and Propulsion Systems
  • Aerospace Standard
  • AS9581B
  • Current
Published 2019-08-15 by SAE International in United States
No Abstract Available.
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Hands-on Cybersecurity Studies: Multi-Perspective Analysis of the WannaCry Ransomware

Aerospace & Defense Technology: August 2019

  • Magazine Article
  • 19AERP08_10
Published 2019-08-01 by SAE International in United States

In-depth analysis of malware provides strategy to defend against future attacks.

Ransomware is malware that obstructs a user from accessing digital assets through various mechanisms. These assets are held hostage and inaccessible until the user pays a ransom. In most cases, this is accomplished using encryption where, once the malicious program executes, it will target and encrypt certain files and will release the decryption key at the time of payment. Some ransomware instances target only certain common user-generated files such as media and documents. In this case, system files and others required for the operating system to function correctly (user authentication, process execution, etc.) are unaffected. Others encrypt much more and seek to lock out entire systems.

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