3 edition of Gust loads on Comet aircraft. found in the catalog.
Gust loads on Comet aircraft.
I W. Kaynes
|Series||Current papers -- 1247.|
Determining critical gust loads on aircraft structures using an evolutionary algorithm Conference Paper (PDF Available) June with Reads How we measure 'reads'. BOAC Flight was a de Havilland Comet passenger jet, operated by British Overseas Airways Corporation (BOAC), that crashed on 10 January after suffering an explosive decompression at altitude. The Comet crashed into the sea near Elba Island, off the Italian coast, killing all 35 people on aircraft, registered G-ALYP, had taken off shortly before from Ciampino Airport in Rome Flight origin: Kallang Airport, Singapore.
A subsequent inquiry into the BOAC crash found the probable cause of the disaster was that "the aircraft suddenly encountered abnormally severe turbulence which imposed a gust load considerably in excess of the design limit." David Learmount, operations and safety editor of Flight International magazine, said: "An event like this is the kind the aviation world hoped it would not see again. The following empirical formula from FAR- 25 , for the probability distribution function of the maximum value of the gust load factor, L, encountered over a time period of length T, was employed here where N (I) = N^p, exp(')+p,exp((11) (12) F^(l) is the probability distribution function of the gust load factor N (I) is the average up Cited by:
Structural Loads Handbook Pedro Albuquerque Alverca do Ribatejo October Abstract From the design viewpoint, the determination of the loads acting on an aircraft is of outmost relevance, because their critical combinations are the designer’s limit constraints. subject to gust loads coming from any direction and on any flight File Size: 1MB. A gust lock on an aircraft is a mechanism that locks control surfaces and keeps open aircraft doors in place while the aircraft is parked on the ground and non-operational. Gust locks prevent wind from causing unexpected movements of the control surfaces and their linked controls inside the aircraft, as well as aircraft doors on some aircraft.
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Out of 5 stars This is best and only book on aircraft gust loads. Reviewed in the United States on Octo The book covers historical development of gust loads criteria and analytical methods. The author is (rightly so) a leading proponent of power spectral (PSD) continuous turbulence methods for development of design gust loads 5/5(3).
GUST LOADS ON COMET AIRCRAFT I. Kaynes SUMMARY Counting accelerometers have been used to record normal accelerations on BOAC Comet 4 and RAP Comet 4C arcraft for flight distances of km and km respectively. Two Comet 4 aircraft carried instruments and a. The gust criteria presented in § consist of two models of atmospheric turbulence, a discrete model and a continuous turbulence model.
This AC focuses on the application of those gust criteria to establish design limit loads. The discrete gust model is used to represent single discrete extreme turbulence events.
The continuous turbulence File Size: KB. Continuous gusts or stochastic gusts are winds that vary randomly in space and time. Models of continuous gusts are used to represent atmospheric turbulence, especially clear air turbulence and turbulent winds in Federal Aviation Administration (FAA) and the United States Department of Defense provide requirements for the models of continuous gusts used in design and simulation of.
This book provides an authoritative and practical presentation of the determination of gust loads on airplanes, especially continuous turbulence gust loads.
The text emphasizes the basic concepts involved in gust load determination and enriches the material with discussion of important relationships, definitions of terminology and nomenclature, historical perspective, and explanations of.
- Dynamic Gust Loads Date Issued Decem Responsible Office ANM, Transport Airplane Directorate Description. This advisory circular (AC) describes acceptable means for showing compliance with the requirements of Ti Code of Federal Regulations (14 CFR)Gust and turbulence n specifies the discrete gust and continuous.
Gust Loads on Aircraft: Concepts and Applications. Frederic M. Hoblit. AIAA, - Airplanes - pages. 0 Reviews. Preview this book Page - An Approach to the Problem of Estimating Severe and Repeated Gust Loads for Missile Operations.
GUST-LOADS RESEARCH In the earliest stages of research on gust loads, an inmiediate practical answer to the n of appropriate design loads was needed. The problem was approached by recourse to the obvious and necessary expedient of measuring. This is a presentation of the determination of gust loads on airplanes, especially continuous turbulence gust loads.
It emphasizes the basic concepts involved and covers relationships, definitions of terminology and nomenclature, historical perspective and explanations of calculations.
(source: Nielsen Book Data). Buy Gust Loads on Aircraft: Concepts & Applications (AIAA Education) by Hoblit, Frederic M., F. Hoblit, Lockheed Company () Hardcover by (ISBN:) from Amazon's Book Store. Everyday low prices and free delivery on eligible orders.5/5(2).
The book covers historical development of gust loads criteria and analytical methods. The author is (rightly so) a leading proponent of power spectral (PSD) continuous turbulence methods for development of design gust loads and fatigue spectra.5/5. On the other hand, identifying these “worst-case gusts” is terribly important for aircraft designers because they need to ensure that aircraft are designed to withstand the dynamic loads associated with these turbulent gusts.
In this paper an evolutionary algorithm (EA) is Cited by: 9. Gust factor It is wise to do the same on half the gust factor to your normal lift-off speed, this should provide a safe margin from the stall.
gust conditions A gust or bump increases the load on the wings. The speed of the airplane should therefore be reduced when flying in gusty approaching to land, on the other hand, a little higher speed should be maintained to assure. The aircraft must also support an ultimate load (=limit load x safety factor) for at least 3 seconds.
The safety factor is generally taken to be Finally, Figure 3b shows a typical gust envelope. A gust alters the angle of attack of the lifting surfaces by an amount equal to where w is the vertical gust velocity. Since the lift scales with.
CALCULATION OF THE RESPONSE OF LINEAR AIRCRAFT 28 7. THE SDG1 AND SDG-AS-SC GUST MODELS 30 Introduction 30 The SDG1 Gust Model 31 The SDG-AS-SC Gust Model 32 Comparison of Loads From SDG1 and SDG-AS-SC With PSD Loads 33 Airbus-Type Aircraft 34 Turboprop-Type Aircraft 40 Trends in SDG and PSD Load Ratios 43File Size: 1MB.
A gust alleviation system is a control system fitted to some Fly-by-wire (FBW) aircraft that reduces the effect of gust loads on the aircraft by deflecting control surfaces such as ailerons, rudder and elevators. gust load formula for avertical gust is, essentially, n k UVa mg S 00 1 1 (5) in conjunction with k m S la g g g m 2.
Inclusion of the inertia forces associated with elastic-mode accelerations indicates dynamic gust loads. Since it is not clearly defined how the gust velocity varies with the gradient distance, the dynamic load Cited by: 3.
This book is probably the most comprehensive and authoritative yet on the Comet aircraft, giving detailed accounts of the aircrafts' design, construction and operation. It suffers a bit from appalling typographical errors throughout giving the impression that the text was not proof read before publication.
In the main however the book is /5(54). Gust load alleviation (GLA) control systems attempt to attenuate aircraft loads caused by the aircraft flying through turbulence. According to Mclean, the use of active control while the aircraft is in turbulence will lead to reduced airframe loads, reduced acceleration at particular aircraft stations, and improved flying qualities.
Several. NATIONAL ADVISORY COMMITTEE FOR AEBONAUTICS TECHNICAL NOTE A FWIISED FOIIMULA. FOR THE C-TION OF GUST LOADS By Kermit G. Pratt SUMMARY A revised gust-load formula with a new gust factor is derived to replace the gust.
THE concept of a “sharp-edged” gust in which the wing is assumed to obey the laws of steady flow has proved useful as a temporary expedient in setting up design criteria for gust loads. However, the trend toward construction of large, heavily loaded transport airplanes and Cited by: 9.The technical books below have proven useful during years of aircraft conceptual design experience in industry and during the writing of AIRCRAFT DESIGN: A Conceptual Approach, the RDS design software, and Dan Raymer's Simplified Aircraft Design for Homebuilders.I actually own almost every one of them and use them often.calculations of the gust alleviation factor for an aircraft with two degrees of freedom made in Refs.
1 and 2, the forces and moments acting on the fuselage, wing and tailplane are all taken into account. When the aircraft penetrates into a vertical up-gust, first of all the gust acting on in rapid estimation of gust loads on a given aircraft.