This SAE Aerospace Recommended Practice (ARP)4294 is directed at life cycle cost (LCC) analysis of aerospace propulsion systems and supplements AIR1939. Specific topics addressed by ARP4294 are listed below: a Propulsion system LCC element structure. b Information exchange and relationships with: (1) Aircraft manufacturer (2) Equipment suppliers (3) Customer c The relationship of the LCC element structure to work breakdown structures. d The relationship between LCC analysis and other related disciplines (e.g., technical (performance analysis, weight control, component lives), reliability, availability and maintainability (RAM), integrated logistic support (ILS), production and finance). e Classification of the accuracy and applicability of LCC assessments.

LCLS Life Cycle Logistics Supportability

Data Formats and Practices for Life Cycle Cost Information

ARP4294A-TEST-REC (Historical)09/10/2021

LCLS Life Cycle Logistics Supportability

Capacitive Fuel Gauging System Accuracies

AIR1184B (Current)04/23/2021

This report is intended to identify the various errors typically encountered in capacitance fuel quantity measurement systems. In addition to identification of error sources, it describes the basic factors which cause the errors. When coupled with appraisals of the relative costs of minimizing the errors, this knowledge will furnish a tool with which to optimize gauging system accuracy, and thus, to obtain the optimum overall system within the constraints imposed by both design and budgetary considerations. Since the subject of fuel measurement accuracy using capacitance based sensing is quite complex, no attempt is made herein to present a fully-comprehensive evaluation of all factors affecting gauging system accuracy. Rather, the major contributors to gauging system inaccuracy are discussed and emphasis is given to simplicity and clarity, somewhat at the expense of completeness. An overview of capacitive fuel gauging operation can be found in AIR5691. This document also discusses how

AE-5A Aerospace Fuel, Inerting and Lubrication Sys Committee

Systems Engineering Capability Model Appraisal Method

EIA731_2A (Current)

03/16/2021

G-47 Systems Engineering

Systems Engineering Capability Model

EIA731_1A (Current)

03/16/2021

The purpose of this Standard is to support the development and improvement of systems engineering capability.

G-47 Systems Engineering

Systems Engineering Capability Model Appraisal Method

EIA731_2A-TEST-REC (Historical)03/16/2021

G-47 Systems Engineering

Systems Engineering Capability Model

EIA731_1A-TEST-REC (Historical)03/16/2021

The purpose of this Standard is to support the development and improvement of systems engineering capability.

G-47 Systems Engineering

Processes for Engineering a System

EIA632A (Current)

02/23/2021

The purpose of this Standard is to provide an integrated set of fundamental processes to aid a developer in the engineering or reengineering of a system. Use of this Standard is intended to help developers a) establish and evolve a complete and consistent set of requirements that will enable delivery of feasible and cost-effective system solutions; b) satisfy requirements within cost, schedule, and risk constraints; c) provide a system, or any portion of a system, that satisfies stakeholders over the life of the products that make up the system. NOTE—The term product is used in this standard to mean: a physical item, such as a satellite (end product), or any of its component parts (end products); a software item such as a stand-alone application to run within an existing system (end product); or a document such as a plan, or a service such as test, training, or maintenance support, or equipment such as a simulator (enabling products). d) provide for the safe and/or cost-effective

G-47 Systems Engineering

Processes for Engineering a System

EIA632A-TEST-REC (Historical)02/23/2021

G-47 Systems Engineering

025 - Method for Predicting Erosion Due to Cavitation of Outboard-Motor

SAE-PP-0015401/25/2021

When the planing craft with outboard motor is running, cavitation occurs around the surface of propeller and lower unit of outboard motor. Cavitation has been classified under several categories by the feature and cause of occurrence. Among them, cloud cavitation and root cavitation lead to erosion damage on the surface of lower unit and propeller. To prevent from poor appearance or performance deterioration of outboard motor by erosion damage, it is important problem to predict the erosion occurrence. Currently we can predict the cavitation phenomena sufficiently, but the area of cavitation does not necessarily correspond with the area of erosion. In this study, we present the new method to predict the area of erosion due to cavitation using CFD (computer fluid dynamics) analysis. In order to evaluate the accuracy of erosion occurrence simulation, the simulation results are compared against the result of a full-scale cruising test. Comparison between simulation and experiment suggests

Mutagaana, Festo

024 - Influence of the Kind of Fatty Acid Methyl Esters on Diesel Combustion and the Characteristics of Soot Formation in Single Droplet Combustion

SAE-PP-0015301/25/2021

This paper describes the influence of different kinds of FAME (fatty acid methyl ester) on the smoke emissions of a small single cylinder DI diesel engine and the soot formation characteristics in suspended single droplet combustion. The study used eight kinds of commercial FAME and diesel fuel blends. The tested FAMEs are saturated fatty acids with 8 to 18 carbon molecule chains, and with three different double bonds with C18. The results show that with all the FAME mixtures here, the brake thermal efficiencies with the FAME-diesel fuel blends were similar to neat diesel fuel operation while the smoke emissions with all of the tested FAME-diesel fuel blends were lower. To examine the differences in the soot formation characteristics, measurements of the formed soot mass were also performed with a basic experimental technique with suspended single droplet combustion. The soot was trapped on a glass fiber filter, and the mass of the filter was measured with an electronic microbalance

Mutagaana, Festo

Diagnosing COVID-19: Anatomy of an LFI Test Device

TBMG-3784710/01/2020

Every minute matters when an individual needs to know whether he or she has contracted COVID-19. Beyond social distancing and masks, COVID-19 testing solutions have an important role in preventing virus spread. By offering some certainty about the presence or absence of infection, diagnostic testing helps public health efforts to control the virus.

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