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Cranfield University Xue Longxian Actuation
CRANFIELD UNIVERSITY XUE LONGXIAN ACTUATION TECHNOLOGY FOR FLIGHT CONTROL SYSTEM ON CIVIL AIRCRAFT SCHOOL OF ENGINEERING MSc by Research THESIS CRANFIELD UNIVERSITY SCHOOL OF ENGINEERING MSc by Research THESIS Academic Year 2008-2009 XUE LONGXIAN Actuation Technology for Flight Control System on Civil Aircraft Supervisor: Dr. C. P. Lawson Prof. J. P. Fielding January 2009 This thesis is submitted in fulfilment of the requirements for the degree of Master of Science © Cranfield University 2009. All rights reserved. No part of this publication may be reproduced without the written permission of the copyright owner. ABSTRACT This report addresses the author’s Group Design Project (GDP) and Individual Research Project (IRP). The IRP is discussed primarily herein, presenting the actuation technology for the Flight Control System (FCS) on civil aircraft. Actuation technology is one of the key technologies for next generation More Electric Aircraft (MEA) and All Electric Aircraft (AEA); it is also an important input for the preliminary design of the Flying Crane, the aircraft designed in the author’s GDP. Information regarding actuation technologies is investigated firstly. After initial comparison and engineering consideration, Electrohydrostatic Actuation (EHA) and variable area actuation are selected for further research. The tail unit of the Flying Crane is selected as the case study flight control surfaces and is analysed for the requirements. Based on these requirements, an EHA system and a variable area actuation system powered by localised hydraulic systems are designed and sized in terms of power, mass and Thermal Management System (TMS), and thereafter the reliability of each system is estimated and the safety is analysed. -
767, Awl, D622t001-9-01
767-200/300/300F/400ER AIRWORTHINESS LIMITATIONS 767-200/300/300F/400ER AIRWORTHINESS LIMITATIONS (AWLs) D622T001-9-01 JUNE 2019 This document has EAR data with an Export Control Classification Number (ECCN) of 9E991. Export of this technology is controlled under the United States Export Administration Regulations (EAR) (15 CFR 730-774). An export license may be required before it is used for development, production or use by foreign persons from specific countries. The controller of this data has the individual responsibility to abide by all export laws. Boeing claims copyright in each page of this document on to the extent that the page contains copyrightable subject matter. Boeing also claims copyright in this document as a compilation and/or collective work. This document includes proprietary information owned by the Boeing Company and/or one or more third parties. Treatment of the document and the information it contains is governed by contract with Boeing. For more information, contact the Boeing Company, P.O. Box 3707, Seattle WA 98124. Boeing, the Boeing signature, the Boeing symbol, 707, 717, 727, 737, 747, 757, 767, 777, 787, BBJ, DC-8, DC-9, DC-10, MD-10, MD-11, MD-80, MD-88, MD-90, and the red-white-blue Boeing livery are all trademarks owned by The Boeing Company; no trademark license is granted in connection with this document unless provided in writing by Boeing. COMPILED AND PUBLISHED BY: MAINTENANCE PROGRAMS ENGINEERING BOEING COMMERCIAL AIRPLANE GROUP SEATTLE, WASHINGTON D622T001-9-01 JUN 2019 BOEING PROPRIETARY - Copyright -
Glider Handbook, Chapter 2: Components and Systems
Chapter 2 Components and Systems Introduction Although gliders come in an array of shapes and sizes, the basic design features of most gliders are fundamentally the same. All gliders conform to the aerodynamic principles that make flight possible. When air flows over the wings of a glider, the wings produce a force called lift that allows the aircraft to stay aloft. Glider wings are designed to produce maximum lift with minimum drag. 2-1 Glider Design With each generation of new materials and development and improvements in aerodynamics, the performance of gliders The earlier gliders were made mainly of wood with metal has increased. One measure of performance is glide ratio. A fastenings, stays, and control cables. Subsequent designs glide ratio of 30:1 means that in smooth air a glider can travel led to a fuselage made of fabric-covered steel tubing forward 30 feet while only losing 1 foot of altitude. Glide glued to wood and fabric wings for lightness and strength. ratio is discussed further in Chapter 5, Glider Performance. New materials, such as carbon fiber, fiberglass, glass reinforced plastic (GRP), and Kevlar® are now being used Due to the critical role that aerodynamic efficiency plays in to developed stronger and lighter gliders. Modern gliders the performance of a glider, gliders often have aerodynamic are usually designed by computer-aided software to increase features seldom found in other aircraft. The wings of a modern performance. The first glider to use fiberglass extensively racing glider have a specially designed low-drag laminar flow was the Akaflieg Stuttgart FS-24 Phönix, which first flew airfoil. -
Problems of High Speed and Altitude Robert Stengel, Aircraft Flight Dynamics MAE 331, 2018
12/14/18 Problems of High Speed and Altitude Robert Stengel, Aircraft Flight Dynamics MAE 331, 2018 Learning Objectives • Effects of air compressibility on flight stability • Variable sweep-angle wings • Aero-mechanical stability augmentation • Altitude/airspeed instability Flight Dynamics 470-480 Airplane Stability and Control Chapter 11 Copyright 2018 by Robert Stengel. All rights reserved. For educational use only. http://www.princeton.edu/~stengel/MAE331.html 1 http://www.princeton.edu/~stengel/FlightDynamics.html Outrunning Your Own Bullets • On Sep 21, 1956, Grumman test pilot Tom Attridge shot himself down, moments after this picture was taken • Test firing 20mm cannons of F11F Tiger at M = 1 • The combination of events – Decay in projectile velocity and trajectory drop – 0.5-G descent of the F11F, due in part to its nose pitching down from firing low-mounted guns – Flight paths of aircraft and bullets in the same vertical plane – 11 sec after firing, Attridge flew through the bullet cluster, with 3 hits, 1 in engine • Aircraft crashed 1 mile short of runway; Attridge survived 2 1 12/14/18 Effects of Air Compressibility on Flight Stability 3 Implications of Air Compressibility for Stability and Control • Early difficulties with compressibility – Encountered in high-speed dives from high altitude, e.g., Lockheed P-38 Lightning • Thick wing center section – Developed compressibility burble, reducing lift-curve slope and downwash • Reduced downwash – Increased horizontal stabilizer effectiveness – Increased static stability – Introduced -
Issue No. 4, Oct-Dec
Focal Product Support: Commitment, Cooperation, Communication A SERVICE PUBLICATION OF The Lockheed Aeronautical Systems Company LOCKHEED AERONAUTICAL Product Support organization is determined to provide SYSTEMS COMPANY the highest level of service to each of our customers and every one of our airplanes. This level of support Editor is focused toward our personal commitment to our Charles I. Gale customers, quick and open lines of communication to provide information and receive feedback from our Art Director customers, and full cooperation with our customers Cathy E. Howard to develop a team approach to support. Vol. 20, No. 4, October-December 1993 The support arena has undergone vast change in John Gaffney recent years and LASC Product Support has had to CONTENTS evolve to keep pace and meet our customers’ needs. This evolution has resulted in the customer becoming 2 Focal Point more and more prominent in the market place, competition intensifying, and change John L. Gaffney, Director itself becoming constant. LASC Product Support Product Support has made changes and continues to make changes to respond 3 Ramp Hook Retainer to market conditions. Our customers indicated they wanted: Mislocation Playing mix and match with the A “one-stop shop” for all support services. We have become that “one- hook retainers makes cargo ramp stop shop.” Any element of support needed by a customer can be rigging an exercise in frustration. obtained from a single source within LASC Product Support. 10 Making a Ramp Hook Retainer Competitive prices. We are finalizing teaming arrangements which will Identification Tool allow us to offer customers a full spectrum of parts-new, used, and This locally manufactured shop aid overhauled-at competitive prices, all under the auspices of the original can correctly identify the retainers equipment manufacturer. -
Auxiliary Power Unit / Environmental Control Unit (APU/ECU) for the Multiple Launch Rocket System
Auxiliary Power Unit / Environmental Control Unit (APU/ECU) for the Multiple Launch Rocket System Multiple Launch Rocket System (MLRS) APU KEY FEATURES: − 8.5 kW 28 VDC Power Output − 18,500 BTU Net Cooling Capacity ECU Condenser GENERAL PRODUCT DESCRIPTION: The MLS Auxiliary Power Unit brushless, permanent magnet conditions. /Environmental Control Unit generator. The generator system (APU/ECU) has been designed to output and Engine power is The APU gross weight is under provide electrical power and controlled by a variable speed 330 pounds with the ECU cooling to the MLRS tracked governor which, depending on weighing 150 lbs. The System vehicle. Both systems can operate system load, optimizes the engine provides 18,500 Btu/hr cooling independently of one another. The operating speed. The vapor cycle capacity and 8.5 kW at 28-vDC ECU is completely electrically air conditioning system is power output (with voltage ripple driven and can be operated from designed to be in compliance with independent of the engine speed the main engine alternators or the the current environmental or load at less than 100 mV APU. regulations using R-134a RMS). refrigerant and is capable of The power plant is a Hatz 2G-40 operating in severe desert air-cooled diesel engine with a conditions. Its power draw is 150 shaft mounted three-phase amps at 28-vDC at full load APU/ECU FOR MILITARY APPLICATIONS Auxiliary Power Unit / Environmental Control Unit (APU/ECU) for the Multiple Launch Rocket System Condenser Assembly APU Evaporator Assembly Overall APU/ECU Specifications: Exterior Dimensions (L x W x H)........................................…........... -
Lockheed Martin F-35 Lightning II Incorporates Many Significant Technological Enhancements Derived from Predecessor Development Programs
AIAA AVIATION Forum 10.2514/6.2018-3368 June 25-29, 2018, Atlanta, Georgia 2018 Aviation Technology, Integration, and Operations Conference F-35 Air Vehicle Technology Overview Chris Wiegand,1 Bruce A. Bullick,2 Jeffrey A. Catt,3 Jeffrey W. Hamstra,4 Greg P. Walker,5 and Steve Wurth6 Lockheed Martin Aeronautics Company, Fort Worth, TX, 76109, United States of America The Lockheed Martin F-35 Lightning II incorporates many significant technological enhancements derived from predecessor development programs. The X-35 concept demonstrator program incorporated some that were deemed critical to establish the technical credibility and readiness to enter the System Development and Demonstration (SDD) program. Key among them were the elements of the F-35B short takeoff and vertical landing propulsion system using the revolutionary shaft-driven LiftFan® system. However, due to X- 35 schedule constraints and technical risks, the incorporation of some technologies was deferred to the SDD program. This paper provides insight into several of the key air vehicle and propulsion systems technologies selected for incorporation into the F-35. It describes the transition from several highly successful technology development projects to their incorporation into the production aircraft. I. Introduction HE F-35 Lightning II is a true 5th Generation trivariant, multiservice air system. It provides outstanding fighter T class aerodynamic performance, supersonic speed, all-aspect stealth with weapons, and highly integrated and networked avionics. The F-35 aircraft -
Preliminary Horizontal and Vertical Stabilizer Design, Longitudinal and Directional Static Stability
MSD : SAE Aero Aircraft Design & Build Preliminary Horizontal and Vertical Stabilizer Design, Longitudinal and Directional Static Stability Horizontal Stabilizer Parameters: 1. Ratio of horizontal tail-wing aerodynamic centers distance with respect to fuselage length 푙푎푐 /푙푓 2. Overall fuselage length 푙푓 3. Horizontal tail-wing aerodynamic centers distance 푙푎푐 4. Horizontal tail volume coefficient 푉퐻 5. Center of gravity location 푥푐푔 6. Horizontal tail arm 푙푡 7. Horizontal tail planform area 푆푡 8. Horizontal tail airfoil 9. Horizontal tail aspect ratio 퐴푅푡 10. Horizontal tail taper ratio 휆푡 11. Additional geometric parameters (Sweep Angle, Twist Angle, Dihedral) 12. Incidence Angle 푖푡 13. Neutral Point 푥푁푃 14. Static Margin 15. Overall Horizontal Stabilizer Geometry 16. Overall Aircraft Static Longitudinal Stability 17. Elevator (TBD in Control Surfaces Design) Vertical Stabilizer Parameters: 18. Vertical tail volume coefficient 푉푣 19. Vertical tail arm 푙푣 20. Vertical tail planform area 푆푉 21. Vertical tail aspect ratio 퐴푅푣 22. Vertical tail span 푏푣 23. Vertical tail sweep angle Λ푣 24. Vertical tail minimum lift curve slope 퐶 퐿훼 푣 25. Vertical tail airfoil 26. Overall Vertical Stabilizer Geometry 27. Overall Aircraft Static Direction Stability 28. Rudder (TBD in Control Surfaces Design) 1. l/Lf Ratio: 0.6 The table below shows statistical ratios between the distance between the wing aerodynamic center and the horizontal tail aerodynamic center 푙푎푐 with respect to the overall fuselage length (Lf). 2. Fuselage Length (Lf): 60.00 in Choosing this value is an iterative process to meet longitudinal and vertical static stability, internal storage, and center of gravity requirements, but preliminarily choose 푙푓 = 60.00 푖푛 3. -
Chapter 55 Stabilizers
EXTRA - FLUGZEUGBAU GmbH SERVICE MANUAL EXTRA 200 Chapter 55 Stabilizers PAGE DATE: 1. July 1996 CHAPTER 55 PAGE 1 EXTRA - FLUGZEUGBAU GmbH SERVICE MANUAL EXTRA 200 Table of Contents Chapter Title 55-00-00 GENERAL . 3 55-21-00 MAINTENANCE PRACTICES . 8 55-21-01 Horizontal Stabilizer . 8 55-21-02 Vertical Stabilizer . 10 PAGE DATE: 1. July 1996 CHAPTER 55 PAGE 2 EXTRA - FLUGZEUGBAU GmbH SERVICE MANUAL EXTRA 200 55-00-00 GENERAL The EXTRA 200 has a conventional empennage with stabilizers and moveable control surfaces. The spars con- sist of carbon roving caps, carbon fibre webs and PVC foam cores. The shells are built of honeycomb sandwich with glass fibre or optional carbon fibre laminate. Also buckling is prevented by plywood ribs. Deviating from this, the elevator is constructed in the same manner as the ailerons (refer to Chapter 57). On the R/H elevator half a trim tab is fitted with a piano hinge. The layer sequences of the stabilizers, the elevator and the rudder are shown in Figures 1-2. All composite parts, as protection against moisture and UV radiation, are coated with an unsaturated polyester gel- coat, an acrylic filler and finally with an acrylic paint. For repair of composite parts refer to Chapter 51. PAGE DATE: 1. July 1996 CHAPTER 55 PAGE 3 EXTRA - FLUGZEUGBAU GmbH GENERAL SERVICE MANUAL EXTRA 200 Layer Sequence Horizontal Tail Figure 1, Sheet 1 PAGE DATE: 1. July 1996 CHAPTER 55 PAGE 4 EXTRA - FLUGZEUGBAU GmbH GENERAL SERVICE MANUAL EXTRA 200 Layer Sequence Horizontal Tail Figure 1, Sheet 2 PAGE DATE: 1. -
Top Flite Models Inc
Product Support (Do Not Remove From Department) INTRODUCTION TOP FLITE MODELS, INC. is proud to introduce the new Elder 40. This design is a direct result of popular demand after the great little Elder 20 was introduc- ed. Modelers loved the design, still do, but wanted something "larger" and "while you're at it, give it ailerons." So, here it is and does it ever fly nice'. The Elder 40 was designed and sized expressly for .40 engines and this includes the popular .40- .45 and .49 engines. The design turns in great performance with the four-stroke power plants and there is plenty of power margin left over for the aerobatic- minded pilot. However, the real "kick" of this design, like its smaller brother, is the the design with 4-cycle engines is an absolute delight. realistic, slow-speed flights that allow you to actually Give it a try in your Elder 40. Note that the motor mount see the airplane instead of just a blur. we have provided in the kit may not fit some 4-cycle The design lends itself to all kinds of detailing, if you're engines and it may be necessary to visit your local retail so inclined. For the beginner, nothing fancy is needed; hobby shop to get the right one for your engine. go out and fly it. The Elder 40 makes a remarkably good training aircraft with gentle and totally honest flying IMPORTANT NOTE: characteristics. A big bonus here is that your trainer is TOP FLITE MODELS, INC. would certainly recommend just not going to look like everyone else's high-wing, the Elder 40 as a first R/C powered aircraft. -
The Market for Aviation APU Engines
The Market for Aviation APU Engines Product Code #F644 A Special Focused Market Segment Analysis by: Aviation Gas Turbine Forecast Analysis 2 The Market for Aviation APU Engines 2011 - 2020 Table of Contents Executive Summary .................................................................................................................................................2 Introduction................................................................................................................................................................2 Methodology ..............................................................................................................................................................2 Trends..........................................................................................................................................................................3 The Competitive Environment...............................................................................................................................3 Market Statistics .......................................................................................................................................................3 Table 1 - The Market for Aviation APU Engines Unit Production by Headquarters/Company/Program 2011 - 2020 ..................................................5 Table 2 - The Market for Aviation APU Engines Value Statistics by Headquarters/Company/Program 2011 - 2020.................................................10 Figure 1 - The Market -
A Historical Overview of Flight Flutter Testing
tV - "J -_ r -.,..3 NASA Technical Memorandum 4720 /_ _<--> A Historical Overview of Flight Flutter Testing Michael W. Kehoe October 1995 (NASA-TN-4?20) A HISTORICAL N96-14084 OVEnVIEW OF FLIGHT FLUTTER TESTING (NASA. Oryden Flight Research Center) ZO Unclas H1/05 0075823 NASA Technical Memorandum 4720 A Historical Overview of Flight Flutter Testing Michael W. Kehoe Dryden Flight Research Center Edwards, California National Aeronautics and Space Administration Office of Management Scientific and Technical Information Program 1995 SUMMARY m i This paper reviews the test techniques developed over the last several decades for flight flutter testing of aircraft. Structural excitation systems, instrumentation systems, Maximum digital data preprocessing, and parameter identification response algorithms (for frequency and damping estimates from the amplltude response data) are described. Practical experiences and example test programs illustrate the combined, integrated effectiveness of the various approaches used. Finally, com- i ments regarding the direction of future developments and Ii needs are presented. 0 Vflutte r Airspeed _c_7_ INTRODUCTION Figure 1. Von Schlippe's flight flutter test method. Aeroelastic flutter involves the unfavorable interaction of aerodynamic, elastic, and inertia forces on structures to and response data analysis. Flutter testing, however, is still produce an unstable oscillation that often results in struc- a hazardous test for several reasons. First, one still must fly tural failure. High-speed aircraft are most susceptible to close to actual flutter speeds before imminent instabilities flutter although flutter has occurred at speeds of 55 mph on can be detected. Second, subcritical damping trends can- home-built aircraft. In fact, no speed regime is truly not be accurately extrapolated to predict stability at higher immune from flutter.