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Sept. 12, 1950 W
Sept. 12, 1950 W. ANGST 2,522,337 MACH METER Filed Dec. 9, 1944 2 Sheets-Sheet. INVENTOR. M/2 2.7aar alwg,57. A77OAMA). Sept. 12, 1950 W. ANGST 2,522,337 MACH METER Filed Dec. 9, 1944 2. Sheets-Sheet 2 N 2 2 %/ NYSASSESSN S2,222,W N N22N \ As I, mtRumaIII-m- III It's EARAs i RNSITIE, 2 72/ INVENTOR, M247 aeawosz. "/m2.ATTORNEY. Patented Sept. 12, 1950 2,522,337 UNITED STATES ; :PATENT OFFICE 2,522,337 MACH METER Walter Angst, Manhasset, N. Y., assignor to Square D Company, Detroit, Mich., a corpora tion of Michigan Application December 9, 1944, Serial No. 567,431 3 Claims. (Cl. 73-182). is 2 This invention relates to a Mach meter for air plurality of posts 8. Upon one of the posts 8 are craft for indicating the ratio of the true airspeed mounted a pair of serially connected aneroid cap of the craft to the speed of sound in the medium sules 9 and upon another of the posts 8 is in which the aircraft is traveling and the object mounted a diaphragm capsuler it. The aneroid of the invention is the provision of an instrument s: capsules 9 are sealed and the interior of the cas-l of this type for indicating the Mach number of an . ing is placed in communication with the static aircraft in fight. opening of a Pitot static tube through an opening The maximum safe Mach number of any air in the casing, not shown. The interior of the dia craft is the value of the ratio of true airspeed to phragm capsule is connected through the tub the speed of sound at which the laminar flow of ing 2 to the Pitot or pressure opening of the Pitot air over the wings fails and shock Waves are en static tube through the opening 3 in the back countered. -
No Acoustical Change” for Propeller-Driven Small Airplanes and Commuter Category Airplanes
4/15/03 AC 36-4C Appendix 4 Appendix 4 EQUIVALENT PROCEDURES AND DEMONSTRATING "NO ACOUSTICAL CHANGE” FOR PROPELLER-DRIVEN SMALL AIRPLANES AND COMMUTER CATEGORY AIRPLANES 1. Equivalent Procedures Equivalent Procedures, as referred to in this AC, are aircraft measurement, flight test, analytical or evaluation methods that differ from the methods specified in the text of part 36 Appendices A and B, but yield essentially the same noise levels. Equivalent procedures must be approved by the FAA. Equivalent procedures provide some flexibility for the applicant in conducting noise certification, and may be approved for the convenience of an applicant in conducting measurements that are not strictly in accordance with the 14 CFR part 36 procedures, or when a departure from the specifics of part 36 is necessitated by field conditions. The FAA’s Office of Environment and Energy (AEE) must approve all new equivalent procedures. Subsequent use of previously approved equivalent procedures such as flight intercept typically do not need FAA approval. 2. Acoustical Changes An acoustical change in the type design of an airplane is defined in 14 CFR section 21.93(b) as any voluntary change in the type design of an airplane which may increase its noise level; note that a change in design that decreases its noise level is not an acoustical change in terms of the rule. This definition in section 21.93(b) differs from an earlier definition that applied to propeller-driven small airplanes certificated under 14 CFR part 36 Appendix F. In the earlier definition, acoustical changes were restricted to (i) any change or removal of a muffler or other component of an exhaust system designed for noise control, or (ii) any change to an engine or propeller installation which would increase maximum continuous power or propeller tip speed. -
16.00 Introduction to Aerospace and Design Problem Set #3 AIRCRAFT
16.00 Introduction to Aerospace and Design Problem Set #3 AIRCRAFT PERFORMANCE FLIGHT SIMULATION LAB Note: You may work with one partner while actually flying the flight simulator and collecting data. Your write-up must be done individually. You can do this problem set at home or using one of the simulator computers. There are only a few simulator computers in the lab area, so not leave this problem to the last minute. To save time, please read through this handout completely before coming to the lab to fly the simulator. Objectives At the end of this problem set, you should be able to: • Take off and fly basic maneuvers using the flight simulator, and describe the relationships between the control yoke and the control surface movements on the aircraft. • Describe pitch - airspeed - vertical speed relationships in gliding performance. • Explain the difference between indicated and true airspeed. • Record and plot airspeed and vertical speed data from steady-state flight conditions. • Derive lift and drag coefficients based on empirical aircraft performance data. Discussion In this lab exercise, you will use Microsoft Flight Simulator 2000/2002 to become more familiar with aircraft control and performance. Also, you will use the flight simulator to collect aircraft performance data just as it is done for a real aircraft. From your data you will be able to deduce performance parameters such as the parasite drag coefficient and L/D ratio. Aircraft performance depends on the interplay of several variables: airspeed, power setting from the engine, pitch angle, vertical speed, angle of attack, and flight path angle. -
AC 91-79A CHG 1 Appendix 1 APPENDIX 1
U.S. Department Advisory of Transportation Federal Aviation Administration Circular Subject: Mitigating the Risks of a Runway Date: 4/28/16 AC No: 91-79A Overrun Upon Landing Initiated by: AFS-800 Change: 1 1. PURPOSE. This advisory circular (AC) provides ways for pilots and airplane operators to identify, understand, and mitigate risks associated with runway overruns during the landing phase of flight. It also provides operators with detailed information that operators may use to develop company standard operating procedures (SOP) to mitigate those risks. 2. PRINCIPAL CHANGES. This change to the AC aligns the runway condition reported by airports with the runway condition reported to the pilots per the Runway Condition Assessment Matrix (RCAM) in Appendix 1. It also includes updates to Appendix 3, Tables 3-2 and 3-3 that provide an accurate mathematical process that yields the depicted values, clarifies in the table titles what the tables present, and deletes the Table 3-3 Note to remove redundancy. Additional minor corrections were made to the AC. PAGE CONTROL CHART Remove Pages Dated Insert Pages Dated Appendix 1, Pages 1 thru 4 9/17/14 Appendix 1, Pages 1 thru 3 4/28/16 Appendix 2, Page 2 9/17/14 Appendix 2, Page 2 4/28/16 Appendix 3, Page 2 9/17/14 Appendix 3, Page 2 4/28/16 Appendix 3, Page 5 9/17/14 Appendix 3, Page 5 4/28/16 Appendix 3, Pages 7 and 8 9/17/14 Appendix 3, Pages 7 and 8 4/28/16 Appendix 4, Page 1 9/17/14 Appendix 4, Page 1 4/28/16 ORIGINAL SIGNED by /s/ John Barbagallo Deputy Director, Flight Standards Service U.S. -
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”. -
Introduction
CHAPTER 1 Introduction "For some years I have been afflicted with the belief that flight is possible to man." Wilbur Wright, May 13, 1900 1.1 ATMOSPHERIC FLIGHT MECHANICS Atmospheric flight mechanics is a broad heading that encompasses three major disciplines; namely, performance, flight dynamics, and aeroelasticity. In the past each of these subjects was treated independently of the others. However, because of the structural flexibility of modern airplanes, the interplay among the disciplines no longer can be ignored. For example, if the flight loads cause significant structural deformation of the aircraft, one can expect changes in the airplane's aerodynamic and stability characteristics that will influence its performance and dynamic behavior. Airplane performance deals with the determination of performance character- istics such as range, endurance, rate of climb, and takeoff and landing distance as well as flight path optimization. To evaluate these performance characteristics, one normally treats the airplane as a point mass acted on by gravity, lift, drag, and thrust. The accuracy of the performance calculations depends on how accurately the lift, drag, and thrust can be determined. Flight dynamics is concerned with the motion of an airplane due to internally or externally generated disturbances. We particularly are interested in the vehicle's stability and control capabilities. To describe adequately the rigid-body motion of an airplane one needs to consider the complete equations of motion with six degrees of freedom. Again, this will require accurate estimates of the aerodynamic forces and moments acting on the airplane. The final subject included under the heading of atmospheric flight mechanics is aeroelasticity. -
Chapter: 2. En Route Operations
Chapter 2 En Route Operations Introduction The en route phase of flight is defined as that segment of flight from the termination point of a departure procedure to the origination point of an arrival procedure. The procedures employed in the en route phase of flight are governed by a set of specific flight standards established by 14 CFR [Figure 2-1], FAA Order 8260.3, and related publications. These standards establish courses to be flown, obstacle clearance criteria, minimum altitudes, navigation performance, and communications requirements. 2-1 fly along the centerline when on a Federal airway or, on routes other than Federal airways, along the direct course between NAVAIDs or fixes defining the route. The regulation allows maneuvering to pass well clear of other air traffic or, if in visual meteorogical conditions (VMC), to clear the flightpath both before and during climb or descent. Airways Airway routing occurs along pre-defined pathways called airways. [Figure 2-2] Airways can be thought of as three- dimensional highways for aircraft. In most land areas of the world, aircraft are required to fly airways between the departure and destination airports. The rules governing airway routing, Standard Instrument Departures (SID) and Standard Terminal Arrival (STAR), are published flight procedures that cover altitude, airspeed, and requirements for entering and leaving the airway. Most airways are eight nautical miles (14 kilometers) wide, and the airway Figure 2-1. Code of Federal Regulations, Title 14 Aeronautics and Space. flight levels keep aircraft separated by at least 500 vertical En Route Navigation feet from aircraft on the flight level above and below when operating under VFR. -
Adaptive Trajectory Planning for Flight Management Systems
From: AAAI Technical Report SS-01-06. Compilation copyright © 2001, AAAI (www.aaai.org). All rights reserved. Adaptive Trajectory Planning for Flight Management Systems Igor Alonso-Portillo Ella M. Atkins Aerospace Engineering Department University of Maryland College Park, MD 20742 {alonsoip, atkins}@glue.umd.edu Abstract This paper describes an adaptive trajectory planner capable of computing new flight paths that take into Current Flight Management Systems (FMS) can account flight plan goals as well as system failures that autonomously fly an aircraft from takeoff through landing but may not provide robust operation to anomalous events. affect aircraft performance. We propose feedback of We present an adaptive trajectory planner capable of changing flight dynamics from the lower level control dynamically adjusting its world model and re-computing systems to the high level path-planning module. This feasible flight trajectories in response to changes in aircraft information can be crucial when there are variations in the performance characteristics. To demonstrate our approach, flight envelope of the aircraft that invalidate the presumed we consider the class of situations in which an emergency model. Based on dynamic parameter feedback, our path landing at a nearby airport is desired (or required) for planner adapts its performance model. Then, it either safety considerations. Our system incorporates a verifies that current trajectories are still safe or else constraint-based search engine to select and prioritize generates a new trajectory that allows continued emergency landing sites, then it synthesizes a waypoint- autonomous operation during post-failure flight. This based trajectory to the best airport based on post-anomaly flight dynamics. -
FAA-H-8083-3A, Airplane Flying Handbook -- 3 of 7 Files
Ch 04.qxd 5/7/04 6:46 AM Page 4-1 NTRODUCTION Maneuvering during slow flight should be performed I using both instrument indications and outside visual The maintenance of lift and control of an airplane in reference. Slow flight should be practiced from straight flight requires a certain minimum airspeed. This glides, straight-and-level flight, and from medium critical airspeed depends on certain factors, such as banked gliding and level flight turns. Slow flight at gross weight, load factors, and existing density altitude. approach speeds should include slowing the airplane The minimum speed below which further controlled smoothly and promptly from cruising to approach flight is impossible is called the stalling speed. An speeds without changes in altitude or heading, and important feature of pilot training is the development determining and using appropriate power and trim of the ability to estimate the margin of safety above the settings. Slow flight at approach speed should also stalling speed. Also, the ability to determine the include configuration changes, such as landing gear characteristic responses of any airplane at different and flaps, while maintaining heading and altitude. airspeeds is of great importance to the pilot. The student pilot, therefore, must develop this awareness in FLIGHT AT MINIMUM CONTROLLABLE order to safely avoid stalls and to operate an airplane AIRSPEED This maneuver demonstrates the flight characteristics correctly and safely at slow airspeeds. and degree of controllability of the airplane at its minimum flying speed. By definition, the term “flight SLOW FLIGHT at minimum controllable airspeed” means a speed at Slow flight could be thought of, by some, as a speed which any further increase in angle of attack or load that is less than cruise. -
Aircraft Performance: Atmospheric Pressure
Aircraft Performance: Atmospheric Pressure FAA Handbook of Aeronautical Knowledge Chap 10 Atmosphere • Envelope surrounds earth • Air has mass, weight, indefinite shape • Atmosphere – 78% Nitrogen – 21% Oxygen – 1% other gases (argon, helium, etc) • Most oxygen < 35,000 ft Atmospheric Pressure • Factors in: – Weather – Aerodynamic Lift – Flight Instrument • Altimeter • Vertical Speed Indicator • Airspeed Indicator • Manifold Pressure Guage Pressure • Air has mass – Affected by gravity • Air has weight Force • Under Standard Atmospheric conditions – at Sea Level weight of atmosphere = 14.7 psi • As air become less dense: – Reduces engine power (engine takes in less air) – Reduces thrust (propeller is less efficient in thin air) – Reduces Lift (thin air exerts less force on the airfoils) International Standard Atmosphere (ISA) • Standard atmosphere at Sea level: – Temperature 59 degrees F (15 degrees C) – Pressure 29.92 in Hg (1013.2 mb) • Standard Temp Lapse Rate – -3.5 degrees F (or 2 degrees C) per 1000 ft altitude gain • Upto 36,000 ft (then constant) • Standard Pressure Lapse Rate – -1 in Hg per 1000 ft altitude gain Non-standard Conditions • Correction factors must be applied • Note: aircraft performance is compared and evaluated with respect to standard conditions • Note: instruments calibrated for standard conditions Pressure Altitude • Height above Standard Datum Plane (SDP) • If the Barometric Reference Setting on the Altimeter is set to 29.92 in Hg, then the altitude is defined by the ISA standard pressure readings (see Figure 10-2, pg 10-3) Density Altitude • Used for correlating aerodynamic performance • Density altitude = pressure altitude corrected for non-standard temperature • Density Altitude is vertical distance above sea- level (in standard conditions) at which a given density is to be found • Aircraft performance increases as Density of air increases (lower density altitude) • Aircraft performance decreases as Density of air decreases (higher density altitude) Density Altitude 1. -
Effective Flight Plans Can Help Airlines Economize
While flight plan calculations are necessary for safety and regulatory compliance, they also provide airlines with an opportunity for cost optimization. Effective Flight Plans Can Help Airlines Economize By Steve Altus, Ph.D., Senior Scientist, Airline Operations Product Development, Jeppesen Every commercial airline flight begins with a flight plan. Over time, small adjustments to each flight plan can add up to substantial savings across a fleet. Optimal overall performance is influenced by many factors, including dynamic route optimization, accurate flight plans, optimal use of redispatch, and dynamic airborne replanning. While all airlines use computerized flight planning systems, investing in a higher-end system — and in the effort to use it to its full capability — has significant impact on both profitability and the environment. An operational flight plan is required to This article provides a brief overview of and lost revenue from payload that can’t ensure an airplane meets all of the flight planning and discusses ways that flight be carried. These variations are subject to operational regulations for a specific flight, planning systems can be used to reduce airplane performance, weather, allowed to give the flight crew information to help operational costs and help the environment. route and altitude structure, schedule them conduct the flight safely, and to constraints, and operational constraints. coordinate with air traffic control (ATC). FLIGHT PLanninG FUndaMentaLS Computerized systems for calculating OptiMIZinG FLIGHT PLans flight plans have been widely used for A flight plan includes the route the crew will decades, but not all systems are the fly and specifies altitudes and speeds.I t also While flight plan calculations are necessary same. -
ATP IFR Flight Planning Training Supplement
IFR Flight Planning Training Supplement ATPFlightSchool.com Revised 2018-12-03 Revised 2018-12-03 Copyright © 2018 Airline Transport Professionals. No part of this publication may be reproduced, stored in a retrieval system, or transmitted, in any form or by any means electronic, mechanical or otherwise, without the prior written permission of Airline Transport Professionals. To view recent changes to this supplement, visit: atpflightschool.com/changes/supp-ifr Contents Introduction .................................... 1 Pre- Planning Preparation .............. 2 Overview ..................................................... 2 Weather ....................................................... 3 NOTAMs ...................................................... 5 Preferred Routes ....................................... 5 Departure Segment Planning........ 6 Departure Airport Information ................... 6 Takeoff Minimums ...................................... 6 Departure Procedure ................................. 6 Top of Climb Calculations ........................... 7 Arrival Segment Planning .............. 8 Arrival Procedure ....................................... 8 Descent Planning ....................................... 9 Arrival Airport Information .......................10 Choosing an Alternate ..............................10 Enroute Segment Planning .......... 11 Federal Airway Routing .............................11 Direct Routing Between Navaids or Fixes 12 IFR Altitudes .............................................12 Cruise Performance