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Viewing 1 to 30 of 3461
2014-10-08
Standard
ARP5454B
This SAE Aerospace Recommended Practice (ARP) describes the multi-pass method for evaluating the filtration performance of fine lube filter elements, commonly utilized in aerospace power and propulsion lubrication systems: gas turbine engines, auxiliary power units (APUs), helicopter transmissions, constant speed drives (CSDs), and integrated drive generators (IDGs).
2014-10-06
WIP Standard
AS955A
This SAE Aerospace Standard (AS) covers high strength thin wall (commercial) metric sockets, universal metric sockets, metric box wrenches and metric torque adaptors which possess the strength, clearances, and internal wrenching design so configured that, when mated with 12 point fasteners conforming to the requirement of ISO 4095, they shall transmit torque to the fastener without bearing on the outer 5% of the fastener's wrenching points. This standard provides additional requirements beyond ASME B107.100 and B107.5M appropriate for aerospace use. Inclusion of dimensional data in this document is not intended to imply that all of the products described herein are stock production sizes. Consumers are requested to consult with manufacturers concerning lists of stock production sizes. The dimensional limits of box and combination wrench lengths have been established to provide configuration control for tool storage applications.
2014-10-05
Event
The SAE Chassis Brake Standards Committee plays a central role in the establishment of essential consensus-based industry standards. Each committee develops a full suite of standards that are related to quality, durability, environmental effects, and safety. The development or revision of SAE Standards need to incorporate the global perspective as a key success factor. This panel presentation and discussion will provide a direct insight into recent developments and activities from the SAE Chassis Brake Standards Committees. Additionally, the panel will include different regions and Standard Development Organizations including Asia-Pacific, Europe, and Latin America. The panel will provide an excellent platform to detect opportunities for integration and harmonization among SDOs from around the world.
2014-09-30
WIP Standard
AIR6334
This SAE Aerospace Information Report (AIR) examines the need for and the application of a power train usage metric that can be used to more accurately determine the TBO for helicopter transmissions. It provides a formula for the translation of the recorded torque history into mechanical usage. It provides examples of this process and recommends a way forward. This document of the SAE HM-1 IVHM Committee is not intended as a legal document and does not provide detailed implementation steps, but does address general implementation concerns and potential benefits.
2014-09-25
Event
This session shall include papers related to military manned aircraft and air vehicle electrical power management and distribution (relays, circuit breakers, SSPCs), control & protection, arc fault protection, power conversion (AC/DC, DC/DC/ AC/AC) and power conditioning. AC (fixed & variable frequency) and DC (28 VDC and 270 VDC) systems are planned for discussion.
2014-09-25
Event
This session shall include papers related to military manned aircraft and air vehicle electrical power management and distribution (relays, circuit breakers, SSPCs), control & protection, arc fault protection, power conversion (AC/DC, DC/DC/ AC/AC) and power conditioning. AC (fixed & variable frequency) and DC (28 VDC and 270 VDC) systems are planned for discussion.
2014-09-24
Event
This session is dedicated to topics dealing with the integration between the Powerplant system & the airframe. This session covers the physical & functional interfaces between the different components, and their aerodynamic, thermal, structural, loads & Dynamic integration. This session covers: the Engine, Nacelle, Pylon & associated local sub systems (Fuel, Bleed, Oil, Fire, Etc).
2014-09-24
Event
This session focuses on the use of the engines as novel flight effectors, including integrated control of flight path and engines, strategies and architectures for improved flight safety and fuel efficiency, engine and flight control interfaces, novel flight and engine control requirements and restrictions due to integration, flight and propulsion control law design, and model based control law design and validation.
2014-09-24
Event
This session focuses on the use of the engines as novel flight effectors, including integrated control of flight path and engines, strategies and architectures for improved flight safety and fuel efficiency, engine and flight control interfaces, novel flight and engine control requirements and restrictions due to integration, flight and propulsion control law design, and model based control law design and validation.
2014-09-23
Event
2014-09-23
Event
2014-09-16
Standard
ARP169B
This SAE Aerospace Recommended Practice (ARP) defines a method of numbering aricraft engine cylinders.
2014-09-16
Technical Paper
2014-01-2133
Darcy Allison, Edward Alyanak
Abstract For the design process of the class of aircraft known as an efficient supersonic air vehicle, particular attention must be paid to the propulsion system design as a whole including installation effects integrated into a vehicle performance model. The propulsion system assumed for the efficient supersonic air vehicle considered in this paper is a three-stream variable cycle engine. A computational model has been built with the Numerical Propulsion System Simulation (NPSS) software to analyze this engine. This engine model was based on the generic adaptive turbine engine model developed at the turbine engines division of the US Air Force Research Laboratory. Along with this variable cycle NPSS model, a three-ramp external compression inlet model meant for conceptual design has been developed. This model will be used to capture inlet installation effects, including those attributable to angle of attack changes at supersonic Mach numbers. These models have been integrated into the Service ORiented Computing EnviRonment (SORCER), which enables parallel execution of the installed NPSS model to rapidly evaluate a full flight envelope.
2014-09-16
Technical Paper
2014-01-2141
Christine Ross, Michael Armstrong, Mark Blackwelder, Catherine Jones, Patrick Norman, Steven Fletcher
Abstract The Turboelectric Distributed Propulsion (TeDP) concept uses gas turbine engines as prime movers for generators whose electrical power is used to drive motors and propulsors. For this NASA N3-X study, the motors, generators, and DC transmission lines are superconducting, and the power electronics and circuit breakers are cryogenic to maximize efficiency and increase power density of all associated components. Some of the protection challenges of a superconducting DC network are discussed such as low natural damping, superconducting and quenched states, and fast fault response time. For a given TeDP electrical system architecture with fixed power ratings, solid-state circuit breakers combined with superconducting fault-current limiters are examined with current-source control to limit and interrupt the fault current. To estimate the protection system weight and losses, scalable models of cryogenic bidirectional current-source converters, cryogenic bidirectional IGBT solid-state circuit breakers (CBs), and resistive-type superconducting fault current limiters (SFCLs) are developed to assess how the weight and losses of these components vary as a function of nominal voltage and current and fault current ratings.
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