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Aerospace & Defense Technology: April 2022

2022-04-01
Artificial Intelligence in the Battlespace Key Considerations for a New Way of Fighting War Machining Beryllium Electrified Propulsion for Aerospace Where to Start The Future of Managing Mission-Critical Systems Improving Battlefield Connectivity for the Modern Warfighter How to Test a Cognitive EW System Molded RF Materials for Hypersonic Sensors and Seekers AUVSI XPONENTIAL Multimode Optical Fiber Sensing Although the vast majority of fiber optic strain sensors use single mode fiber, multimode fiber has a higher nonlinear threshold that enables higher light levels and lower noise, while the diversity of spatial modes can be used to develop sensors that are inherently immune to signal fading.
Magazine

Aerospace & Defense Technology: August 2023

2023-08-03
Electrifying Aviation: The Path to Decarbonizing the Skies /Electric aviation mirrors the early stages of the electric vehicle revolution Advances in Military Avionics Technologies Create New Challenges for RF Test and Measurement Plasma Electrolytic Oxidation: The Future of Lightweight Designs in Aerospace and Defense Advanced RF Simulation Reduces Cost and Schedule Risk Assure 5G NTN Performance Before Launch In the complex and quickly evolving 5G NTN landscape, simulating, emulating, and evaluating RF systems boosts mission success. Qualification of Multi-Channel Direction Finding Radar Receivers in The Lab Bullet Impact Testing of Ammunition and Explosives at Picatinny Arsenal A bullet impact (BI) test for evaluating the response of energetically loaded items has been established at the U.S. Army Combat Capabilities Command (DEVCOM) Armaments Center (AC) Explosive Development Facility.
Magazine

Aerospace & Defense Technology: February 2021

2021-01-28
Empowering Soldiers Through ISPDS Dispensable Gels vs Gap Filler Pads An Analysis of Thermal Management Materials Electronic Warfare Vying for Control of the Electromagnetic Spectrum More Bang for the Buck A New Design and Manufacturing Method for Deep Penetrating Bomb Cases A Comprehensive Way to Use Bonding to Improve RF Performance of Low Noise Amplifiers Army and Universities Deploy New Warfighter Communication Technology Radiation Effects on Electronics in Aligned Carbon Nanotube Technology (RadCNT) Characterizing the fundamental mechanisms and charge transport phenomena governing the interactions between ionizing and non-ionizing radiation with carbon-based (nanotube and graphene) field-effect transistors (FETs) devices and integrated circuits (ICs).
Magazine

Aerospace Engineering & Manufacturing 2010-06-23

2010-06-23
Fast-track propulsion testing Whether it is compressor refinement or complete test programs for next-generation aircraft, the level of propulsion system development in Europe seems to be ever-increasing.
Magazine

Aerospace Engineering 2003-02-01

2003-02-01
Explosion suppressant arresting foam Technological refinements over three decades have enabled a family of polyerethane foams to aid in the prevention of catastrophic explosions caused by electrical arching, lightning strikes, and static electrical discharge. Improving SA via HUD Engineers from Honeywell and BAE Systems address the saftety and avionics issues inherent in the anticipated increase in air traffic.
Magazine

Aerospace Engineering 2003-09-01

2003-09-01
Fastener industry on fast track of change Technologies developed for fastening of metal aerospace parts are being transferred for bonding of composite parts. Moving toward sensor standardization One of the challenges facing aerospace developers is getting accurate test data from the many sensors used to monitor performance, simplifying setup and calibration. Wing design opens the envelope Technology presented at ACE describes a design process for a lightweight wing with an aerodynamic shape that is optimal for a large part of the cruise flight.
Magazine

Aerospace Engineering 2004-06-01

2004-06-01
Showing how it's done Engineers are using software to better manage product development data, and applying tools to a new class of problems. NASA goes deep The agency's new long-term space exploration program starts with a return to the moon and will ultimately enable future exploration of Mars and other solar system destinations. Farnborough preview In an event that happens just once every two years, bringing the multitudes together, it is important to get as much technology as possible into the open and to find solutions to hard problems. Seats under crash loading The FAA and academia have conducted aircraft seat drop tests to compare and contrast passenger crash protection. A fluid approach Aerospace engineers have started using CFD software earlier and earlier in the design process.
Technical Paper

Aerospace Plane Hydrogen Scramjet Boosting

1991-09-01
912071
The results of computational investigations carried out to clarify the possibilities of hydrogen scramjet thrust uprating in hypersonic flight (M >8) by adding to the fuel substances with higher density are presented. Thrust, specific impulse and density impulse are calculated while adding nitrogen, oxygen, water or inert liquated gases. ...For scramjet boosting in hypersonic flight it is suggested to add oxygen to stoichiometric part of hydrogen instead of excessive part of hydrogen.
Standard

Aircraft Tail Bumpers

2021-06-22
CURRENT
AIR1800B
This SAE Aerospace Information Report (AIR) covers the field of civilian, commercial and military airplanes and helicopters. This summary of tail bumper design approaches may be used by design personnel as a reference and guide for future airplanes and helicopters that require tail bumpers. Those described herein will consist of simple rub strips, structural loops with a wear surface for runway contact, retractable installations with replaceable shock absorbers and wear surfaces and complicated retractable tail landing gears with shock strut, wheels and tires. The information will be presented as a general description of the installation, its components and their functions.
Journal Article

Analytical Estimation of Infrared Signature of Converging and Converging-Diverging Nozzles of Jet Engine

2021-04-21
Abstract Jet engine hot parts (e.g., jet nozzle) are a crucial source of aircraft’s infrared (IR) signature from the rearview, in 1.9-2.9 μm and 3-5 μm bands. The exhaust nozzle design used in a jet aircraft affects its performance and IR signature (which is also affected just by performance) from the engine layout. For supersonic aircraft (typically for M ∞ > 1.5), a converging-diverging (C-D) nozzle is preferred over a convergent nozzle for optimum performance. The diverging section of the C-D nozzle has a full range of visibility from the rearview; hence, it was not considered a prudent choice for low IR observability. This theoretical study compares the IR signature of the C-D nozzle with that of the convergent nozzle from the rearview in 1.9-2.9 μm and 3-5 μm bands for the same thrust.
Magazine

Automotive Engineering International 2009-08-01

2009-08-01
Toyota punches innovations pedal From hybrids to robots, Toyota promises new ways of thinking to produce new and better products. Hyundai dreams As part of an internal competition, Hyundai designers let their minds wander through time, space, and perhaps some new dimension to conjure concepts that seem outlandish today. Maza fired up about internal combustion There is room in the market for hybrids and all-electric vehicles, but Mazda believes that internal-combustion engine offers the biggest bang for the buck. Helping hands Engineering consulting service providers expect to help OEMs meet greater fuel efficiency and tighter emissions standards. The upside ofdownsizing Hybrid powertrains are undergoing huge changes as successive generations emerge, increasing efficiency and offering better performance, with component sizes shrinking as engineers make changes that address cost.
Article

Boeing debuts first hypersonic passenger aircraft concept

2018-06-29
Officials and engineers at Boeing in Seattle are offering a glimpse into their vision for hypersonic air travel. They have released, for the first time, images of one of the company’s hypersonic air vehicle concepts for potential military and commercial passenger transport. ...They have released, for the first time, images of one of the company’s hypersonic air vehicle concepts for potential military and commercial passenger transport.
Article

Boeing partners with Aerion to speed development and testing of next-generation supersonic aircraft, accelerate supersonic travel

2019-02-05
The AS2 from Aerion in Reno, Nevada, will be the first supersonic business jet to market, Boeing officials in Chicago predict. Boeing (NYSE:BA) is providing engineering, industrial, and financial resources in partnership with Aerion to accelerate technology development and aircraft design, with the goal of bringing supersonic air travel to new markets.
Technical Paper

COMPRESSOR STALL PROBLEMS IN GAS-TURBINE-TYPE AIRCRAFT ENGINES

1957-01-01
570020
This paper was presented at the SAE National Aeronautic Meeting, New York, April 12, 1956. STALL of axial-flow-type compressors limits the flexibility of operation of 1- and 2-spool aircraft turbojet engines. Complete compressor stall or surge is a problem with regard to engine acceleration as well as low-and high-Mach-number flight at high altitudes. Deterioration of compressor performance due to low Reynolds numbers at extreme altitudes aggravates the stall problem. Inlet-flow distortions increase the severity of this problem, particularly for supersonic flight. Rotating stall at low values of equivalent rotative speed is a serious source of blade vibrational failure. This latter problem is also aggravated by inlet-flow distortions.
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