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Journal Article

2-Stroke High Speed Diesel Engines for Light Aircraft

2011-09-11
2011-24-0089
The paper describes a numerical study, supported by experiments, on light aircraft 2-Stroke Direct Injected Diesel engines, typically rated up to 110 kW (corresponding to about 150 imperial HP). The engines must be as light as possible and they are to be directly coupled to the propeller, without reduction drive. The ensuing main design constraints are: i) in-cylinder peak pressure as low as possible (typically, no more than 120 bar); ii) maximum rotational speed limited to 2600 rpm. As far as exhaust emissions are concerned, piston aircraft engines remain unregulated but lack of visible smoke is a customer requirement, so that a value of 1 is assumed as maximum Smoke number. For the reasons clarified in the paper, only three cylinder in line engines are investigated. Reference is made to two types of scavenging and combustion systems, designed by the authors with the assistance of state-of-the-art CFD tools and described in detail in a parallel paper.
Article

2018-08-01
SaraniaSat, an aerospace startup in Los Angeles, won a three-year, $5.1 million NASA In-Space Validation of Earth Science Technologies (InVEST) contract to test and advance the company’s Hyperspectral Thermal Imager (HyTI), being touted as a unique, disruptive technology for hyperspectral remote sensing, a technology also known as imaging spectroscopy used to detect and identify minerals, vegetation, and manmade materials.
Article

2018-08-01
NASA Science Mission Directorate officials in Washington are funding three new projects selected from a pool of 25 received in response to the NASA Earth Science Technology Office’s (ESTO’s) solicitation for the In-Space Validation of Earth Science Technologies (InVEST) program element A.49 of ROSES (Research Opportunities in Space and Earth Sciences) 2017, supporting the Earth Science Division (Solicitation NNH17ZDA001N).
Article

2018-07-17
Officials at GE Aviation and Teradata are expanding their partnership to provide airlines with a framework that combines Teradata’s high-performance analytics in the cloud from with GE Aviation’s edge-connectivity services. Markets and Markets Research estimates the aviation analytics market is a $2.16 billion industry that will grow to an estimated $4.23 billion by 2021.
Article

2018-07-06
Connected aircraft means more than just in-flight movies, free texting, and Facebook posting with friends while in flight. In fact, the connected aircraft revolutionizes airline operations, dramatically improving fleet management, flight safety, passenger experience, maintenance, flight operations, aircraft turnaround time, and costs. For aircraft operators, connectivity presents a new set of operational benefits that were previously unavailable.
Article

2018-07-25
Counterfeit parts prevention is integral to an effective obsolescence management plan, and the focus of anti-counterfeit standards – including Counterfeit Avoidance Standard (AS5553) and Counterfeit Detection Standard (AS6081) – from SAE International in Warrendale, Pa. SAE International officials are bringing the anti-counterfeit discussion and sharing best practices, which include adherence to critical standards, to the Future of Obsolescence Management (FOM) event on October 10 and 11 in Washington.
Article

2019-04-04
In contrast to the stiff, rigid wings found on most commercial aircraft, flexible wing technology is considered essential to next generation, fuel efficient aircraft. However, flexible wings are susceptible to “flutter,” or highly destructive aeroelastic instability. To better understand and mitigate flutter, engineers at NASA’s Armstrong Flight Research Center (AFRC) equipped the X-56 with fiber optic sensing (FOS) technology.
Article

2019-02-14
As mobility software becomes increasingly complex and connected, so does the risk of human error and system safety. To combat this, New York-based software company AdaCore will work with Nvidia Corporation of Santa Clara, California to apply open-source Ada and SPARK programming languages for select software security firmware elements in highly-complex, safety-critical systems like Nvidia’s DRIVE AGX automated and autonomous vehicle solutions.
Article

2019-01-23
The Airbus Quantum Computing Challenge (AQCC) was initiated by the Toulouse-based aerospace corporation to bring quantum computing out of laboratories and apply it directly to challenges facing the aviation industry. The global competition is open to post-graduate students, academics, researchers, and professionals.
Article

2019-01-11
Engineers at Boeing and NASA are collaborating on a lightweight, ultra-thin Transonic Truss-Braced Wing (TTBW) concept, designed to be more aerodynamic and fuel efficient than current designs, as part of the Subsonic Ultra Green Aircraft Research (SUGAR) program focusing on innovative aerospace concepts that reduce noise and emissions while enhancing performance.
Article

2019-01-04
The collaborative development of digital twins will inform additive manufacturing (also known as 3D printing), advanced composites, assembly, and industry 4.0 processes at GKN Aerospace's Global Technology Centre in order to enable the high rate production of aircraft structures.
Article

2019-08-29
Rolls-Royce officials in London are optimizing maintenance, service, and product development using data gleaned from its Trent aircraft engines in service with airlines, with the help of global enterprise applications company IFS in Linkoping, Sweden. Rolls-Royce employs IFS Maintenix to exchange data with airlines operating its Trent 1000, Trent XWB, and Trent 7000 engines.
Article

2018-10-03
Software has transformed every operational asset of everything in life; artificial intelligence (AI) will have as big an impact on life, predicts Mark Roboff, vice president, aerospace and automotive at SparkCognition during the 2018 SAE Aerospace Standards Summit at LMI in McLean, Va.
Article

2018-11-06
The first Airbus A330-800 commercial jet, flight test aircraft MSN1888, took off today from Toulouse-Blagnac Airport on its maiden flight over southwestern France during which the aircraft performed dedicated flight-physics tests required for the variant.
Article

2018-10-29
Model-based systems engineering (MBSE) is taking off in aerospace engineering and systems integration workflows worldwide. Editors in SAE International’s Aerospace Product Group had the opportunity to discuss MBSE trends, tools, and benefits, as well as any impediments to adoption and whether MBSE is likely to transform aerospace systems engineering and integration with Dave Shanley, vice president of segment & product marketing management at Jama Software in Portland, Oregon.
Article

2018-08-23
Demand for high-performance plastics (HPPs) is up across the aerospace industry, driven by such key trends as growing performance requirements, increased use of additive manufacturing or 3D printing, supply chain globalization, and tightening environmental regulations. Growing passenger traffic coupled with the need to reduce emissions – being accomplished through lightweighting, engine downsizing, and vehicle electrification – present opportunities for HPPs, research analysts at Frost & Sullivan in San Antonio, Texas, explain.
Article

2018-10-18
To ensure safe aircraft takeoffs and landings, one of the most vital areas to inspect for possible fatigue cracking and heat damage is the wheel bead seat. Comprehensive examination of this critical area, where the rubber edge of a tire contacts the wheel, requires having the right wheel inspection equipment on hand for the job – and not all maintenance, repair, and overhaul (MRO) facilities do.
Article

2018-09-24
Officials at SAE International in Warrendale, Pa., and Airlines for America (A4A) in Washington are recognizing Karsten Kaiser of Lufthansa Technik and Michael Ernst of subsidiary 3D.aero for furthering the science and efficacy of nondestructive testing (NDT), having presented them with the 16th annual Nondestructive Testing (NDT) Innovation Award at A4A’s annual NDT Forum last week in Seattle.
Article

2018-08-16
Adhesive joining of structural components will assume an increasingly important role in designing and manufacturing lightweight structures for aerospace platforms. The latest book from SAE International, Adhesive Joining of Structural Components: New Insights and Technologies explores recent advancements in adhesive bonding, used in the manufacture of primary aircraft fuselage and wing structures since 1945.
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