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Effects of Aircraft Integration on Compact Nacelle Aerodynamics
Eects of Aircraft Integration on Compact Nacelle Aerodynamics Fernando Tejeroa,∗, Ioannis Goulosa, David G MacManusa, Christopher Sheafb aCentre for Propulsion Engineering, School of Aerospace, Transport and Manufacturing, Craneld University, Bedfordshire, MK43 0AL bRolls-Royce plc., P.O. box 31, Derby, United Kingdom, DE24 8BJ Abstract To reduce specic fuel consumption, it is expected that the next generation of aero-engines will operate with higher bypass-ratios, and therefore fan diame- ters, than current in-service architectures. These new propulsion systems will increase the nacelle size and incur in an additional overall weight and drag con- tribution to the aircraft. In addition, they will be installed more closely-coupled with the airframe, which may lead to an increase in adverse installation eects. As such, it is required to develop compact nacelles which will not counteract the benets obtained from the new engine cycles. A comprehensive investigation of the eects of nacelle design on the overall aircraft aerodynamic performance is required for a better understanding on the eects of aero-engine integration. This paper presents a method for the multi-objective optimisation of drooped and scarfed non-axisymmetric nacelle aero-engines. It uses intuitive Class Shape Tranformations (iCSTs) for the aero-engine geometry denition, multi-point aerodynamic simulation, a near-eld nacelle drag extraction method and the NSGA-II genetic algorithm. The process has been employed for the aerody- namic optimisation of a compact nacelle aero-engine as well as a conventional nacelle conguration. Subsequently, the designed architectures were installed on a conventional commercial transport aircraft and evaluated at dierent in- stallation positions. -
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. -
Aerosport Modeling Rudder Trim
AEROSPORT MODELING RUDDER TRIM Segment: MOBILITY PARTS PROVIDERS | Engineering companies Application vertical: MOBILITY AND TRANSPORTATION | AircraFt Application type: FINAL PART: Short runs THE CUSTOMER FINAL PART: SHORT RUNS AEROSPORT MODELING RUDDER TRIM COMPANY DESCRIPTION APPLICATION TRADITIONAL MANUFACTURING Some planes are equipped with small tabs on the control surfaces (e.g., rudder trim Assembly of 26 different machined and standard parts Aerosport Modeling & Design was established in tabs, aileron tabs, elevator tabs) so the pilot can make minute adjustments to pitch, September 1996, and since then, they have worked to yaw, and roll to keep the airplane flying a true, clean line through the air. This produce the highest-possible quality prototypes, improves speed by reducing drag from the larger, constant movements of the full appearance models, working models, and machined rudder, aileron, and elevator. parts, and to meet or exceed client expectations. The company strives to be seen as a partner to their Many airplanes also have rudder and/or aileron trim systems. On some, the rudder clients and an extension of their design and trim tab is rigid but adjustable on the ground by bending: It is angled slightly to the development team, not just a supplier of prototyping left (when viewed from behind) to lessen the need for the pilot to push the rudder services. pedal constantly in order to overcome the left-turning tendencies of many prop- driven aircraft. Some aircraft have hinged rudder trim tabs that the pilot can adjust Aerosport Products spun off from sister company in flight. Aerosport Modeling & Design in 2009 to develop products for experimental aircraft, the first of which When a servo tab is employed, it is moved into the slipstream opposite of the was the RV-10 Carbon Fiber Instrument Panel. -
IIIHIHIIIHIIII O US005143329A United States Patent (19) 11 Patent Number: 5,143,329 Coffinberry (45) Date of Patent: Sep
IIIHIHIIIHIIII O US005143329A United States Patent (19) 11 Patent Number: 5,143,329 Coffinberry (45) Date of Patent: Sep. 1, 1992 (54) GASTURBINE ENGINE POWERED AIRCRAFT ENVIRONMENTAL CONTROL FOREIGN PATENT DOCUMENTS SYSTEM AND BOUNDARY LAYER BLEED 0065855 5/1982 European Pat. Off. (75) Inventor: George A. Coffinberry, West Chester, g 32 E." Ohio 143598 4/1953 United Kingdom. (73) Assignee: General Electric Company, 744923 5/1954 United Kingdom. 774695 4/1955 United Kingdom . Cincinnati, Ohio 846358 6/1958 United Kingdom. 21 Appl. No.: 738,985 1530330 1/1976 United Kingdom . 202.7874 2/1980 United Kingdom ............. 24418.5 22 Filed: Aug. 1, 1991 2074654 4/1980 United Kingdom . 2076897 12/1981 United Kingdom ............. 244/118.5 Related U.S. Application Data 2127492 6/1983 United Kingdom . 62 Division of Ser. No. 531,718, Jun. 1, 1990. Primary Examiner-Joseph F. Peters, Jr. 5 Assistant Examiner-Christopher P. Ellis O2,207. Attorney, Agent, or Firm-Jerome C. Squillaro 244/53 R; 45.4/71 57 ABSTRACT 58) Field of Search ..................... 244/118.5, 207, 208, 244/209 53 R. 60/39. 142 39.07, 39.15, 39.183: An aircraft gas turbine engine is provided with a start s A 4-y 9. '987 ing air turbine that is directly connected through the starter gearbox to the high pressure (HP) shaft and is 56) References Cited provided with an apparatus to extract excess energy U.S. PATENT DOCUMENTS from engine compressor bleed air, return it to the en 2,734,443 2/1956 Wood ..................................... oss gine, and to start the engine with compressed air from 2,777,301 1/1957 Kuhn ..... -
Anti-Servo/Trim Tab Drive Pin Replacement
Anti-servo/trim tab drive pin replacement Classification - Mandatory Applicability All Europa aircraft (stage1 kits supplied prior to 1st December 2000) Compliance Inspection - before the next flight Incorporation - Within the next 15 flying hours Parts pro vided 1 x TP16P tab drive pin, 1 x TP16S tab drive pin In tro duc tion An incident occurred to the company demonstrator aircraft G-GBXS where one of the TP16 anti-servo/ trim tab drive pins became detached due to the plate it was welded to fracturing. The aircraft was on the ground when the failure occurred, probably during engine starting, and the resulting behaviour of the aircraft in flight was to pitch nose up. The pitch up force was containable by the pilot and a circuit and landing was successfully flown. The fracture was established to have been caused by fatigue due to repeated bending of TP16’s plate. The bending that this plate had been subjected to was likely to have been in excess of normal due to vibrations caused by an engine starting problem. The aircraft had completed 426 hours of flight which included 895 take-off and landings. It is important that the cause of unusual vibrations, for example engine starting problems or an unbalanced propeller, are resolved at the earliest opportunity. Samples of the TP16 component were taken from six aircraft which had flight times up to approximately 600 hours, and analysis revealed no cracking. However, since there has been a failure of part of the aircraft control system, it is necessary that the tab pin drive plates are replaced by a stronger design than the original. -
Helicopter Safety November-December 1988
F L I G H T S A F E T Y F O U N D A T I O N HELICOPTER SAFETY Vol. 14 No. 6 November/December 1988 Tiltrotor Offers A Choice Although the first flight of the V-22 Osprey tiltrotor has been delayed, the author has had the opportunity to fly Bell-Boeing’s simulator at Ft. Worth, Tex., U.S. Through his description of his simulator ride, it is apparent the tiltrotor will be a challenge for both fixed-wing and helicopter pilots. by Joe Mashman Bell Helicopter Textron, Inc. and Boeing Helicopter Com- Flying the Tiltrotor Simulator pany joined forces to develop the V-22 Osprey tiltrotor air- craft, based upon the Bell Model 301/XV-15, a two-seat tiltro- This pilot recently flew the Bell-Boeing engineering tiltrotor tor research aircraft. simulator, at Ft. Worth, Tex., U.S., and discovered the unique qualities of the tiltrotor aircraft. The all-composite (epoxy/graphite laminate) V-22 is 57.25 feet long and has a 46.5 foot wingspan. Its obstruction-free The simulator was configured with the U.S. Navy V-22 Os- cabin is 24 feet 2 inches long, 5 feet 11 inches wide and 6 feet prey control system and flight characteristics; the simulation high, and allows versatile configurations for personnel or called for 40,000 pounds maximum gross weight at sea level, cargo. Two Allison T406-AD-400 engines will deliver up to standard conditions. The handling qualities of the aircraft 6,150 shp to turn the two 38-foot diameter rotors. -
Actuator Saturation Analysis of a Fly-By-Wire Control System for a Delta-Canard Aircraft
DEGREE PROJECT IN VEHICLE ENGINEERING, SECOND CYCLE, 30 CREDITS STOCKHOLM, SWEDEN 2020 Actuator Saturation Analysis of a Fly-By-Wire Control System for a Delta-Canard Aircraft ERIK LJUDÉN KTH ROYAL INSTITUTE OF TECHNOLOGY SCHOOL OF ENGINEERING SCIENCES Author Erik Ljudén <[email protected]> School of Engineering Sciences KTH Royal Institute of Technology Place Linköping, Sweden Saab Examiner Ulf Ringertz Stockholm KTH Royal Institute of Technology Supervisor Peter Jason Linköping Saab Abstract Actuator saturation is a well studied subject regarding control theory. However, little research exist regarding aircraft behavior during actuator saturation. This paper aims to identify flight mechanical parameters that can be useful when analyzing actuator saturation. The studied aircraft is an unstable delta-canard aircraft. By varying the aircraft’s center-of- gravity and applying a square wave input in pitch, saturated actuators have been found and investigated closer using moment coefficients as well as other flight mechanical parameters. The studied flight mechanical parameters has proven to be highly relevant when analyzing actuator saturation, and a simple connection between saturated actuators and moment coefficients has been found. One can for example look for sudden changes in the moment coefficients during saturated actuators in order to find potentially dangerous flight cases. In addition, the studied parameters can be used for robustness analysis, but needs to be further investigated. Lastly, the studied pitch square wave input shows no risk of aircraft departure with saturated elevons during flight, provided non-saturated canards, and that the free-stream velocity is high enough to be flyable. i Sammanfattning Styrdonsmättning är ett välstuderat ämne inom kontrollteorin. -
Evaluation of V-22 Tiltrotor Handling Qualities in the Instrument Meteorological Environment
University of Tennessee, Knoxville TRACE: Tennessee Research and Creative Exchange Masters Theses Graduate School 5-2006 Evaluation of V-22 Tiltrotor Handling Qualities in the Instrument Meteorological Environment Scott Bennett Trail University of Tennessee - Knoxville Follow this and additional works at: https://trace.tennessee.edu/utk_gradthes Part of the Aerospace Engineering Commons Recommended Citation Trail, Scott Bennett, "Evaluation of V-22 Tiltrotor Handling Qualities in the Instrument Meteorological Environment. " Master's Thesis, University of Tennessee, 2006. https://trace.tennessee.edu/utk_gradthes/1816 This Thesis is brought to you for free and open access by the Graduate School at TRACE: Tennessee Research and Creative Exchange. It has been accepted for inclusion in Masters Theses by an authorized administrator of TRACE: Tennessee Research and Creative Exchange. For more information, please contact [email protected]. To the Graduate Council: I am submitting herewith a thesis written by Scott Bennett Trail entitled "Evaluation of V-22 Tiltrotor Handling Qualities in the Instrument Meteorological Environment." I have examined the final electronic copy of this thesis for form and content and recommend that it be accepted in partial fulfillment of the equirr ements for the degree of Master of Science, with a major in Aviation Systems. Robert B. Richards, Major Professor We have read this thesis and recommend its acceptance: Rodney Allison, Frank Collins Accepted for the Council: Carolyn R. Hodges Vice Provost and Dean of the Graduate School (Original signatures are on file with official studentecor r ds.) To the Graduate Council: I am submitting herewith a thesis written by Scott Bennett Trail entitled “Evaluation of V-22 Tiltrotor Handling Qualities in the Instrument Meteorological Environment”. -
Stabilizer PLUS 7-Channel Receiver Essential Instructions
Lemon RX Stabilizer PLUS Receiver – Essential Instructions v1.1 Lemon RX Stabilizer PLUS 7-Channel Receiver Essential Instructions Contents Introducing the Lemon StabPLUS ............................................................................................................ 2 Functions ........................................................................................................................................................ 2 Transmitter Requirements .............................................................................................................................. 2 Servos and Power Sources .............................................................................................................................. 3 Setting up the StabPLUS ......................................................................................................................... 4 Installation ...................................................................................................................................................... 4 Binding ............................................................................................................................................................ 5 Setting Failsafe ................................................................................................................................................ 5 Test Flying .............................................................................................................................................. 6 Preparing -
January 2012 Alerts
ADVISORY CIRCULAR 43-16A AVIATION MAINTENANCE ALERTS ALERT JANUARY NUMBER 2012 402 CONTENTS AIRPLANES BOMBARDIER...........................................................................................................................1 CESSNA ......................................................................................................................................4 DIAMOND ................................................................................................................................13 HELICOPTERS BELL..........................................................................................................................................15 POWERPLANTS PRATT & WHITNEY ...............................................................................................................18 ACCESSORIES AEROSEKUR FLOATS ...........................................................................................................19 KELLY ALTERNATOR...........................................................................................................19 AIR NOTES INTERNET SERVICE DIFFICULTY REPORTING (iSDR) WEB SITE...............................21 IF YOU WANT TO CONTACT US.........................................................................................22 AVIATION SERVICE DIFFICULTY REPORTS ...................................................................22 January 2012 AC 43-16A U.S. DEPARTMENT OF TRANSPORTATION FEDERAL AVIATION ADMINISTRATION WASHINGTON, DC 20590 AVIATION MAINTENANCE ALERTS The Aviation Maintenance -
09 Stability and Control
Aircraft Design Lecture 9: Stability and Control G. Dimitriadis Introduction to Aircraft Design Stability and Control H Aircraft stability deals with the ability to keep an aircraft in the air in the chosen flight attitude. H Aircraft control deals with the ability to change the flight direction and attitude of an aircraft. H Both these issues must be investigated during the preliminary design process. Introduction to Aircraft Design Design criteria? H Stability and control are not design criteria H In other words, civil aircraft are not designed specifically for stability and control H They are designed for performance. H Once a preliminary design that meets the performance criteria is created, then its stability is assessed and its control is designed. Introduction to Aircraft Design Flight Mechanics H Stability and control are collectively referred to as flight mechanics H The study of the mechanics and dynamics of flight is the means by which : – We can design an airplane to accomplish efficiently a specific task – We can make the task of the pilot easier by ensuring good handling qualities – We can avoid unwanted or unexpected phenomena that can be encountered in flight Introduction to Aircraft Design Aircraft description Flight Control Pilot System Airplane Response Task The pilot has direct control only of the Flight Control System. However, he can tailor his inputs to the FCS by observing the airplane’s response while always keeping an eye on the task at hand. Introduction to Aircraft Design Control Surfaces H Aircraft control -
10CAG/10CHG/10CG-2.4Ghz 10-CHANNEL RADIO CONTROL SYSTEM
10CAG/10CHG/10CG-2.4GHz 10-CHANNEL RADIO CONTROL SYSTEM INSTRUCTION MANUAL Technical updates and additional programming examples available at: http://www.futaba-rc.com/faq Entire Contents ©Copyright 2009 1M23N21007 TABLE OF CONTENTS INTRODUCTION ........................................................... 3 Curve, Prog. mixes 5-8 ............................................. 71 Additional Technical Help, Support and Service ........ 3 GYA gyro mixing (GYRO SENSE) ............................... 73 $SSOLFDWLRQ([SRUWDQG0RGL¿FDWLRQ ........................ 4 Other Equipment ....................................................... 74 Meaning of Special Markings ..................................... 5 Safety Precautions (do not operate without reading) .. 5 Introduction to the 10CG ............................................ 7 GLIDER (GLID(1A+1F)(2A+1F)(2A+2F)) FUNCTIONS . 75 &RQWHQWVDQG7HFKQLFDO6SHFL¿FDWLRQV........................ 9 Table of contents........................................................ 75 Accessories ............................................................... 10 Getting Started with a Basic 4-CH Glider ................ 76 Transmitter Controls & GLIDER-SPECIFIC BASIC MENU FUNCTIONS ........ 78 6ZLWFK,GHQWL¿FDWLRQ$VVLJQPHQWV ............................. 11 Model type (PARAMETER submenu) ........................... 78 Charging the Ni-Cd Batteries ................................... 15 MOTOR CUT ................................................................ 79 Stick Adjustments ....................................................