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| Author | : |
| Publisher | : |
| Total Pages | : 83 |
| Release | : 2004 |
| Genre | : |
| ISBN | : |
| Author | : James D. Brown |
| Publisher | : |
| Total Pages | : 160 |
| Release | : 1988 |
| Genre | : |
| ISBN | : |
The U.S. Army Aviation Engineering Flight Activity conducted an Airworthiness and Flight Characteristics evaluation of the UH-1H aircraft with an Improved Engine Air Filtration System (IEAFS) installed and with the standard filter installed between 16 September 1987 and 29 February 1988. Aircraft performance and handling qualities, engine-air induction system compatibility, and engine performance with the IEAFS installed were evaluated. This evaluation was conducted at Edwards AFB, California. Twenty-five flights were conducted for a total of 20.1 productive flight hours. The aircraft performance and handling qualities, engine vibrations, and inlet temperature characteristics with the IEAFS installed are not significantly different from those of the standard UH-1H. The inlet pressure distortion and engine installation losses with the IEAFS installed are less than those of the standard UH-1H. One deficiency, the poor reliability of the IEAFS latch rivets, was identified. One shortcoming, the poor reliability of the latch lever locking device, was identified. Both the deficiency and the shortcoming should be corrected before production. Engine installation losses, Engine vibrations, Engine air filtration system, Inlet pressure distortion, Inlet temperature characteristics, Performance, Handling qualities, Standard filter. (mjm).
| Author | : Robert M. Buckanin |
| Publisher | : |
| Total Pages | : 42 |
| Release | : 1977 |
| Genre | : |
| ISBN | : |
The United States Army Aviation Engineering Flight Activity conducted a Preliminary Airworthiness Evaluation of the EH-1H Helicopter Quick Fix Phase 1A to determine the effects of the installation of the AN/ARQ-33 radio countermeasures system and its associated equipment on aircraft handling qualities. The helicopter was tested from 18 through 23 August 1977 at Naval Air Station, Pensacola, Florida. During the tests, nine flights totaling 8.5 productive flight hours were flown. The handling qualities of the EH-1H helicopter were determined to be satisfactory with the exception of inadequate directional control in right sideward flight. An enhancing characteristic noted was the simultaneous antenna retraction systems. Inadequate directional control at right sideward velocities between 5 and 15 knots true airspeed was a deficiency. Two shortcomings were noted: the susceptibility to damage of the right FM 10-120 homing antenna during preflight/maintenance operations and the susceptibility to damage of the FM 10-242 communications antenna during running takeoff/landing maneuvers. (Author).
| Author | : Victor Hwa |
| Publisher | : |
| Total Pages | : 51 |
| Release | : 2015 |
| Genre | : |
| ISBN | : |
The Bell Boeing V-22 Osprey Tiltrotor has seen significant deployment to austere environments where airborne sand and dust is generated due to aircraft operation on, or near, the ground. Current V-22 production aircraft are equipped with an engine air particle separator (EAPS) to remove larger particles of sand and dust, but finer particulates remain an issue for engine combustion air. A prototype engine inlet barrier filter (EIBF) has been developed as a more robust particle filtration solution. Inlet air filtration with the prototype EIBF is expected to quadruple engine time-on-wing by preventing nearly all fine particulates from entering the engine. The prototype EIBF was installed on the left side of an MV-22 aircraft and was flight tested at the Bell Xworx facility in Arlington, TX with an inlet rake installed at the compressor face of the left-handside engine (#1 engine) to measure inlet pressures and temperatures. The author used this data to quantify inlet pressure recovery and inlet flow distortion. Measured data were correlated with analytical results obtained from Computational Fluid Dynamics (CFD); however, this thesis will focus on the flight test aspect of the test and omit technical details regarding the comparison between flight test and CFD. The inlet distortion analysis showed that stable engine operation was achieved with the inlet barrier filter installed. Engine performance was quantified by using Power Assurance Check data generated by the V-22 Vibration, Structural Life, and Engine Diagnostic System (VSLED) on-board the aircraft, where the treated engine (inlet barrier filter installed) was compared to the baseline production inlet configuration. Austere (sand environment) flight tests were conducted at Albuquerque, NM and salt water environment tests were conducted at Pensacola, FL. The inlet barrier filter treatment resulted in a system that maintained engine performance significantly longer than the baseline air particle separator.
| Author | : Richard Shepherd Shevell |
| Publisher | : Pearson Education India |
| Total Pages | : 468 |
| Release | : 1989 |
| Genre | : Aerodynamics |
| ISBN | : 9788177587425 |
| Author | : J. Seddon |
| Publisher | : AIAA (American Institute of Aeronautics & Astronautics) |
| Total Pages | : 440 |
| Release | : 1999 |
| Genre | : Science |
| ISBN | : |
"Intake Aerodynamics, Second Edition" presents computational advancements and discoveries in intake aerodynamics. A companion volume to "Practical Intake Aerodynamic Design," this important text considers the problem of airflow, both internal and external to air intake, as applied to civil and military aircraft. It covers the aerodynamics of subsonic and supersonic intakes in real flows, maintaining a progression through the transonic range. Also considered is the joint perspective of the airframe designer and the propulsion specialist in practical cases. Readers will gain insight into the fluid mechanics behind the deceleration of air from free stream to engine velocity, and an understanding of air compression and external drag in extensively revised chapters reflecting progress in the field. More than 300 drawings and diagrams help to illustrate the points defined throughout the book. Copublished with Blackwell Science Ltd. Outside the United States and Canada, order from Blackwell Science Ltd., United Kingdom, tel 44 1865 206 206.
| Author | : Wayne Johnson |
| Publisher | : Cambridge University Press |
| Total Pages | : 949 |
| Release | : 2013-04-29 |
| Genre | : Technology & Engineering |
| ISBN | : 1107355281 |
A rotorcraft is a class of aircraft that uses large-diameter rotating wings to accomplish efficient vertical take-off and landing. The class encompasses helicopters of numerous configurations (single main rotor and tail rotor, tandem rotors, coaxial rotors), tilting proprotor aircraft, compound helicopters, and many other innovative configuration concepts. Aeromechanics covers much of what the rotorcraft engineer needs: performance, loads, vibration, stability, flight dynamics, and noise. These topics include many of the key performance attributes and the often-encountered problems in rotorcraft designs. This comprehensive book presents, in depth, what engineers need to know about modelling rotorcraft aeromechanics. The focus is on analysis, and calculated results are presented to illustrate analysis characteristics and rotor behaviour. The first third of the book is an introduction to rotorcraft aerodynamics, blade motion, and performance. The remainder of the book covers advanced topics in rotary wing aerodynamics and dynamics.
| Author | : |
| Publisher | : |
| Total Pages | : 296 |
| Release | : 1991 |
| Genre | : Aeronautics |
| ISBN | : |
| Author | : Ahmed F. El-Sayed |
| Publisher | : Springer |
| Total Pages | : 1025 |
| Release | : 2016-05-25 |
| Genre | : Technology & Engineering |
| ISBN | : 1447167961 |
This book provides a comprehensive basics-to-advanced course in an aero-thermal science vital to the design of engines for either type of craft. The text classifies engines powering aircraft and single/multi-stage rockets, and derives performance parameters for both from basic aerodynamics and thermodynamics laws. Each type of engine is analyzed for optimum performance goals, and mission-appropriate engines selection is explained. Fundamentals of Aircraft and Rocket Propulsion provides information about and analyses of: thermodynamic cycles of shaft engines (piston, turboprop, turboshaft and propfan); jet engines (pulsejet, pulse detonation engine, ramjet, scramjet, turbojet and turbofan); chemical and non-chemical rocket engines; conceptual design of modular rocket engines (combustor, nozzle and turbopumps); and conceptual design of different modules of aero-engines in their design and off-design state. Aimed at graduate and final-year undergraduate students, this textbook provides a thorough grounding in the history and classification of both aircraft and rocket engines, important design features of all the engines detailed, and particular consideration of special aircraft such as unmanned aerial and short/vertical takeoff and landing aircraft. End-of-chapter exercises make this a valuable student resource, and the provision of a downloadable solutions manual will be of further benefit for course instructors.
| Author | : Franklin Fisher |
| Publisher | : CreateSpace |
| Total Pages | : 564 |
| Release | : 2012-07-13 |
| Genre | : |
| ISBN | : 9781478241522 |
This book is an attempt to present under one cover the current state of knowledge concerning the potential lightning effects on aircraft and that means that are available to designers and operators to protect against these effects. The impetus for writing this book springs from two sources- the increased use of nonmetallic materials in the structure of aircraft and the constant trend toward using electronic equipment to handle flight-critical control and navigation function.
