scholarly journals Next Generation 2 MW Turboshaft and Turboprop Engines

1993 ◽  
Author(s):  
Robert L. Vogt ◽  
Arun Sehra
Keyword(s):  
Air Force ◽  
Low Cost ◽  
Advanced Technology ◽  
Next Generation ◽  
Us Army ◽  
Us Air Force ◽  
Us Navy ◽  
Near Term ◽  
Turboshaft Engine ◽  
The U.S

Textron Lycoming of Stratford, Connecticut is incorporating the latest in advanced technology into turboshaft and turboprop engines for near term commercial service. The level of cold section technology being incorporated is the already demonstrated next generation of axi-centrifugal compressor beyond that which was developed for the U.S. Army T800, 0.9 MW turboshaft engine in the late 1980s. The compressor evolution is given special emphasis. The hot section technology is a robust, simplified, low cost, commercial endurance derate of the tri-service; US Army, US Navy, US Air Force and Textron Lycoming joint core engine [1] now on test. The new 2 MW commercial engine has substantially reduced fuel consumption, is lighter, and is smaller than today’s best engines. Engineering development is now underway and certification is slated to be completed in 1996.

Development of Microwave Interferometry Nondestructive Testing Solution for Complex Materials

2011 ◽  
Author(s):  
Karl Schmidt ◽  
Jack Little
Keyword(s):  
Air Force ◽  
Research Laboratory ◽  
Nuclear Power ◽  
Ceramic Composite ◽  
Manufacturing Defects ◽  
Us Army ◽  
Us Air Force ◽  
Composite Armor ◽  
Ceramic Composite Armor ◽  
Air Force Research Laboratory

Application of engineered ceramic materials in high temperature environments of advanced propulsion systems in high performance aircraft; structural demands in ceramic-composite armor; application of high density polyethylene in piping, and reinforced rubber in nuclear power service; and fiber reinforced resin overwraps for piping, all present demanding nondestructive testing challenges. A new technology, Evisive Scan™, has been recently developed that allows condition monitoring in these challenging materials. The internationally patented Evisive Scan™ method is based on microwave interferometry. It utilizes microwaves to interrogate dielectric materials, including material with complex internal structure. The microwaves are reflected at areas of changing dielectric constant. The reflected energy and the interrogating beam are combined to form an interference pattern which is measured in the transceiver as a signal voltage. The method requires access to only one surface, does not require contact or a coupling medium. The signal voltage is sampled at many positions in the inspection area. This point cloud is displayed as an Evisive Scan™ image, which presents volumetric detail of the inspected part. This data is rich with information which is processed in near real time for advanced analysis. The technology has been successfully applied to Ceramic Matrix Composites where it is used to measure density and porosity and identify manufacturing defects. The technology has been demonstrated to be applicable to ceramic composite armor made of monolithic ceramic tiles in complex, multilayer, dielectric structures. The technology is being used to detect manufacturing defects in composite resin structures. The technology has been successfully demonstrated on fiber reinforced resin pipe overwraps, and the technology has been used for condition monitoring of reinforced rubber flexible couplings in nuclear power plants. The nuclear power plant application is performed under a fully qualified, US nuclear quality assurance 10CFR50 App B and NQA-1 compliant program. Examples of these applications are presented, with explanation of the operating principles of the technology and illustrations of the individual applications. Work included in the report is supported by the US Air Force Research Laboratory, US Army Tank-Automotive Research, Development and Engineering Center (TARDEC), US Army Research Laboratory and US Air Force Research Laboratory. Evisive would like to acknowledge project participation and support by Argonne National Laboratory, and Saudi Aramco.

Applying Virtual Environment Technology to the Design of Fighter Aircraft Cockpits: Pilot Performance and Situation Awareness in a Simulated Air Combat Task

1994 ◽  
Vol 38 (1) ◽  
pp. 115-118 ◽  
Author(s):  
Lawrence J. Hettinger ◽  
W. Todd Nelson ◽  
Michael W. Haas
Keyword(s):  
Virtual Environment ◽  
Air Force ◽  
Situation Awareness ◽  
Current Experiment ◽  
Pilot Performance ◽  
Fighter Aircraft ◽  
Us Air Force ◽  
Air Combat ◽  
To Receive ◽  
The U.S

The use of multi-sensory displays for fighter aircraft cockpits is being investigated at the U.S. Air Force's Armstrong Laboratory as a means of enhancing pilot performance. The current experiment was conducted to evaluate the effect of employing such displays on the performance of a simulated air combat task. Each of four experienced US Air Force F-16 pilots flew 12 simulated missions which required them to locate and destroy four enemy bombers whose flight path was pre-programmed. Simultaneously, two other pilots were assigned to auxiliary cockpits in the laboratory and flew enemy fighter aircraft in an attempt to intercept and shoot down the primary pilot. Therefore there were three active participants in each air combat scenario. Each pilot flew six trials using a cockpit comprised of conventional F-15 flight instruments and six trials using a modified, multi-sensory cockpit. The results indicated that pilot performance and situation awareness were generally superior with the multi-sensory cockpit as opposed to the conventional cockpit, although statistical differences between the two were at best marginally significant. Nevertheless, the results suggest that if pilots were to receive advance training with the multi-sensory cockpit their performance may exceed that in the highly overlearned conventional cockpit by even more substantial amounts.

An evaluation of pilot uplook for a US Air Force and US Navy helmet-mounted cueing system.

1997 ◽  
Author(s):  
Sherri U. Blackwell ◽  
Tina R. Brill ◽  
Gregory F. Zehner ◽  
Philip J. Krauskopf ◽  
Glenn C. Robbins
Keyword(s):  
Air Force ◽  
Us Air Force ◽  
Us Navy

„Unexplained physiological events“ in Hochleistungsflugzeugen

2018 ◽  
Vol 25 (06) ◽  
pp. 255-260
Author(s):  
Carla Ledderhos
Keyword(s):  
Air Force ◽  
Us Air Force ◽  
Us Navy

ZUSAMMENFASSUNGSeit 2008 klagten F-22-Raptor-Piloten wiederholt über hypoxieähnliche Symptome im Flugbetrieb, die unter dem Begriff „hypoxia-like events“ in die Literatur eingegangen sind. Nach Verlusten von Piloten und Maschinen hatte im Mai 2011 die gesamte F-22-Flotte der USA Startverbot. Gleichzeitig sind intensive Untersuchungen zu möglichen Ursachen der Zwischenfälle eingeleitet worden, die bis heute andauern. Indessen häuften sich diese Ereignisse auch bei weiteren Hochleistungsflugzeugen. Alle Versuche der US Air Force, US Navy und NASA, die Ursachen der nunmehr als „unexplained physiological events“ (UPEs) oder „physiological events“ (PEs) bezeichneten Vorfälle aufzuklären, schlugen ungeachtet intensiver Bemühungen fehl. Momentan stellen PEs eine der größten Herausforderungen für die Flugmedizin überhaupt dar, die es in Zusammenarbeit mit Piloten, Ingenieuren sowie anderen Fachleuten auf diesem Gebiet zu lösen gilt. Ohne Fortschritte beim physiologischen Inflight-Monitoring und Anpassung des Trainings der Piloten wird dies jedoch unmöglich.

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