Advanced Technology Programs for Small Turboshaft Engines: Past, Present, Future

1991 ◽  
Vol 113 (1) ◽  
pp. 33-39 ◽  
Author(s):  
E. T. Johnson ◽  
H. Lindsay

This paper addresses approximately 15 years of advanced technology programs sponsored by the United States Army Aviation Applied Technology Directorate and its predecessor organizations and conducted by GE Aircraft Engines (GEAE). Included in these programs is the accomplishment of (1) the 1500 shp demonstrator (GE12), which led to the 1700, and (2) the 5000 shp Modern Technology Demonstrator Engine (MTDE/GE27). Also included are several advanced technology component programs that have been completed or are ongoing through the early 1990s. The goals for the next generation of tri-service small advanced gas generator demonstration programs are shown. A prediction is thus made of the advancements required to fulfill the aircraft propulsion system established by the DoD/NASA Integrated High-Performance Turbine Engine Technology (IHPTET) initiative through the year 2000.

Author(s):  
Edward T. Johnson ◽  
Howard Lindsay

This paper addresses approximately 15 years of advanced technology programs sponsored by the United States Army Aviation Applied Technology Directorate and its predecessor organizations and conducted by GE Aircraft Engines (GEAE). Included in these programs is the accomplishment of (1) the 1,500 shp demonstrator (GE12) which led to the T700, and (2) the 5,000 shp Modern Technology Demonstrator Engine (MTDE/GE27). Also included are several advanced technology component programs which have been completed or are ongoing through the early 1990’s. The goals for the next generation of tri-service small advanced gas generator demonstration programs are shown. A prediction is thus made of the advancements required to fulfill the aircraft propulsion system established by the DoD/NASA Integrated High Performance Turbine Engine Technology (IHPTET) initiative through the year 2000.


2021 ◽  
Author(s):  
David Richard Toepler ◽  
Nathan Leightner

The United States Army operates several classes of landing craft, which provide combatant commanders with waterborne maneuver capabilities essential for accomplishing a range of critical missions unique to the Army. These missions involve transport of personnel, cargo, and equipment from advanced bases and large sealift ships to ports, inland riverine regions, as well as remote undeveloped coastlines and beaches. Recognizing the significant roles these vessels play and will continue to play in achieving Army objectives, Army leadership allocated funding to design and build a new class of high performance landing craft: Maneuver Support Vessel (Light) (MSV(L)). The primary mission of MSV(L) is to conduct movement and maneuver of combat-configured Brigade Combat Team force elements such as one M1A2 main battle tank, or two Stryker vehicles, or four Joint Light Tactical Vehicles, each with its crew. MSV(L) will have beaching capability and be able to operate at speeds significantly in excess of any current Army landing craft. The Army Watercraft Systems organization was tasked with overseeing development of requirements and specifications, source selection and acquisition, along with contract, finance, and engineering management of the MSV(L) Program. A contract to develop the detailed design and build a series of vessels was awarded in September 2017. Launch of the initial vessel is planned during the fourth quarter of 2021.


Author(s):  
R. E. Annati ◽  
J. R. Smyth

The Multipurpose Small Power Unit (MPSPU) Advanced Development Program is providing the United States Army and other Department of Defense branches with advanced technology for current and future auxiliary power units (APUs)/secondary power systems (SPSs) in aircraft, combat vehicles, and mobile shelters. The design includes low specific fuel consumption (SFC), weight and volume, acquisition and life cycle costs (LCC), and high reliability and durability. The Garrett Auxiliary Power Division (GAPD) Model GTP50-1 MPSPU has demonstrated major advances in small gas turbine power unit design and manufacturing technologies. Component test rigs have completed extensive development testing. Power unit operation of 214 hours, with 557 starts, has been accumulated. Power unit and rig testing has demonstrated program goals and identified areas for continued technical development. The program has demonstrated 77.6 kW (104 shp), corrected to sea level standard day, at an SFC of 0.5 kg/kW-hr (0.8 lb/hp-hr).


Author(s):  
Pamela Hamblin-Smoske

Boiler tube failures remain the leading cause of lost availability in power boilers across global markets. The need for strategic planning in regard to inspections, preventative maintenance and targeted replacements has never been greater. Identifying the root problem(s) is essential and must be properly managed for continued safety, reliability and availability. The process associated with integrating a boiler management program can be viewed as an insurmountable obstacle for many utility operators and owners. In many cases, the cookie cutter approach that is often used results in insufficient reliability recovery. However, using modern technology and tactics to strategically manage and properly identify specific operating and design conditions has proven exceedingly successful in reducing a unit’s forced outage rate [EFOR]. Specific challenges plants are faced with include the reduction of onsite engineers, aging workforces and equipment, and the need to remain competitive in a challenging global energy market. Plant managers are routinely faced with the complex task of determining the current condition of their equipment, forecasting outage budgets and schedules, and performing risk assessments. Additionally, insurance companies are increasingly requiring inspection and maintenance records that are not always up-to-date or readily available. The solutions to reducing the EFOR of a unit involves taking a comprehensive approach to boiler management utilizing unit specific operational training, advanced data management, and strategic inspection, maintenance and replacement prioritization. Implementing this comprehensive approach has awarded millions in savings for plant managers that have adopted this strategy. Implementing a unit specific, target driven, and strategic plan enables utility owners and operators to succeed in today’s competitive market by increasing the unit’s reliability and availability without sacrificing safety or environmental standards. Thielsch Engineering, Inc. developed a program titled: 4-SYTE System Strategy that is currently utilized in more than 60 power plants within the United States and Canada. Unit specific strategic planning is necessary for all facilities that rely on these critical components. Advanced technology must be adopted by all energy producers to ensure they remain competitive and profitable.


2007 ◽  
Vol 6 (4_suppl) ◽  
pp. 1-7
Author(s):  
James M. Slater

From October 18 to 20, 2006, a symposium, Developing and Understanding a Hospital-based Proton Facility: Bringing Physics Into Medicine, was held at the Renaissance Esmeralda Resort and Spa, Indian Wells, California. The event was offered by the Department of Radiation Medicine at Loma Linda University (LLU), supported by the Telemedicine and Advanced Technology Research Center (TATRC) and the United States Army Medical Research and Materiel Command (USAMRMC). The meeting was intended to discuss factors involved in planning, developing, and operating a hospital-based proton treatment center. It brought together some of the most distinguished physicists, radiation biologists, and radiation oncologists in the world, and more than 100 individuals participated in the three-day educational offering. This overview reports on the event and introduces several papers written by many of the speakers from their presentations, for publication in this issue of Technology in Cancer Research and Treatment. Both the symposium and the papers are appropriate for this journal: exploitation of technology was one of the underlying themes of the symposium.


Author(s):  
Terry Pyle ◽  
Dan Aldrich

Garrett Engine Division of Allied-Signal Aerospace, Inc., which supplies small-to-medium size gas turbine propulsion engines to the fixed-wing aviation market, is expanding its product line to include the small-to-medium turboshaft engine for the rotary wing (helicopter) aviation market. The recent win of the T800-LHT-800 down-select formed a firm foundation for this expansion. Garrett is developing the T800 in a partnership with the Allison Gas Turbine Division of General Motors Corporation, under the company name of Light Helicopter Turbine Engine Company (LHTEC). The T800 turboshaft engine (1300-shp, 1000-kW class), which has superior performance in this power class (10 to 30 percent better specific fuel consumption and power-to-weight than current production turboshaft engines), is designed to power the U.S. Army’s LHX light attack helicopter. Garrett is pursuing complementary technologies focused on serving a full spectrum of turboshaft engine requirements for the 1990s and beyond. Garrett is also teamed with General Electric Aircraft Engines (GEAE), for the Joint Turbine Advanced Gas Generator (JTAGG) demonstrator program. JTAGG supports the Integrated High Performance Turbine Engine Technology (IHPTET) initiative of doubling propulsion system capabilities by the year 2003. New technologies incorporated in the T800, and emerging technologies and concepts applicable to future turboshafts, are discussed.


Author(s):  
Michael J. Zoccoli ◽  
Kenneth P. Rusterholz

The T407/GLC38 is a modern technology 6000 SHP class turboshaft/turboprop gas turbine engine which is being developed jointly by Textron Lycoming (Stratford, Connecticut), General Electric Aircraft Engines (Lynn, Massachusetts), Bendix Controls (South Bend, Indiana), and Ruston Gas Turbines (Great Britain). The gas generator core for the T407/GLC38 engine series is also common to the CFE738, a new generation turbofan which is being developed by General Electric and the Garret Engine Division. The T407 (military)/GLC38 (commercial) is a derivative of the highly successful U.S. Army/GE27 MTDE engine which has been redesigned to meet commercial engine life standards. The design philosophy for this engine was directed at achieving high output power per unit airflow, reliability from reduced parts count, ease of maintenance via extensive modularity, and state-of-the-art SFC levels that are up to 25% below those of existing 5000–6000 SHP powerplants. The latter characteristic manifests itself in reduced life cycle and direct operating costs and (where applicable) tradeoff versatility amongst range, time on station, and payload increase. This paper is a continuation in a documentary series on the T407/GLC38 design and development. It traces the evolution of the T407/GLC38 program from First Engine to Test, wherein all thermodynamic and mechanical objectives were essentially achieved or exceeded, through full system turboprop evaluation, turbofan development testing, and qualification/certification testing completed to date. A comprehensive review of the test objectives, testing requirements, setup, and basic results are provided; in addition, the relevancy and impact of each phase of engine testing towards the goal of qualification/certification and ultimately production is provided.


Author(s):  
James L. Pettigrew

This paper describes observations and analysis of data recorded on operating helicopter engines using advanced technology data recording systems. The US Army began the test on TS3 engines in 1986 and expanded it to their T55, T63, T700, and T703 helicopter engines in 1990. These engines have a gas generator with a free turbine for power production. A portable instrumentation system is used to do inflight helicopter engine tests and electronically record performance information. A PC based data analysis system uses artificial intelligence to change the data into diagnostic information for the test engine’s capability to perform the missions. The data output presents this information in an easily understandable format that allows the decision maker to see differences in the condition of individual engines and rank them on their relative capability. The resulting data base clearly shows each engine’s on-condition status. Valid knowledge of each engine’s condition is very valuable as the basis for decisions that direct the limited resources to the least capable engines. Rejection criteria for installed engine deterioration does not fully agree with observed operational behavior. Observations that are different are: (1) a deteriorated engine’s gas generator slows down when running at rated power yet no minimum speed limit exists and (2) a deteriorated engine operates at a lower SFC than a newly overhauled one yet no minimum limit exists, instead, both conditions are considered indications of better engines.


Author(s):  
Michael J. Zoccoli ◽  
David D. Klassen

The T407/GLC38 turboprop/turboshaft engine is a 6000 shaft horsepower (SHP) class gas turbine engine currently under joint development by Textron Lycoming of Stratford, Connecticut, and GE Aircraft Engines of Lynn, Massachusetts, with Bendix Control of South Bend, Indiana, a division of Allied Signal; Ruston Gas Turbines Limited of Great Britain, part of GEC ALSTHOM; and Steel Products Engineering Company (SPECO) of Springfield, Ohio. The powerplant is derived from the highly successful GE27 Modern Technology Demonstrator Engine (MTDE) program, which was conducted under the auspices of the U.S. Army in the mid-1980s. The T407 turboprop is currently under development for the U.S. Navy’s new P-7A anti-submarine warfare (ASW) aircraft. The P-7A will replace the P-3 and is under contract to Lockheed Aeronautical Systems Company (LASC). A T407 turboshaft model is also in development. The GLC38 commercial turboprop version, planned for both business and commuter aircraft, draws considerably on lessons learned through GE and Textron Lycoming’s extensive commercial experience, thereby ensuring the latest state of the art in maintainability, life, reliability, and ease of operation. The T407/GLC38 engine development program, scheduled for completion in December 1991, is uniquely defined to meet the stringent requirements of both Federal Aviation Administration (FAA) regulations and Military Specification MIL-E-008593E. The engine’s primary identity will be commercial, however, as per agreement with the U.S. Navy. The engine’s gas generator core is also part of a joint venture between the Garrett Engine Division of Allied Signal Corporation and GE. Garrett is responsible for developing the fan and power turbine for a new generation turbofan engine, the CFE738. This paper describes the key features of the T407/GLC38 engine design, performance, and development program.


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