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Monday, April 20, 2020 | History

3 edition of In-flight aerodynamic measurements of an iced horizontal tailplane found in the catalog.

In-flight aerodynamic measurements of an iced horizontal tailplane

In-flight aerodynamic measurements of an iced horizontal tailplane

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  • 23 Currently reading

Published by National Aeronautics and Space Administration, Lewis Research Center, National Technical Information Service, distributor in [Cleveland, Ohio], [Springfield, Va .
Written in English

    Subjects:
  • Aerodynamic characteristics.,
  • Horizontal tail surfaces.,
  • Flight characteristics.,
  • Aerodynamics.,
  • Wind tunnel tests.,
  • Aircraft icing.

  • Edition Notes

    Other titlesIn flight aerodynamic measurements of an iced horizontal tailplane.
    StatementThomas P. Ratvasky, Judith Foss Van Zante.
    SeriesNASA/TM -- 1999-208902., NASA technical memorandum -- 208902.
    ContributionsVan Zante, Judith Foss., Lewis Research Center.
    The Physical Object
    FormatMicroform
    Pagination1 v.
    ID Numbers
    Open LibraryOL18134755M


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In-flight aerodynamic measurements of an iced horizontal tailplane Download PDF EPUB FB2

In-Flight Aerodynamic Measurements of an Iced Horizontal Tailplane Thomas P. Ratvasky Lewis Research Center, Cleveland, Ohio Judith Foss Van Zante Dynacs Engineering Company, Inc., Brook Park, Ohio Prepared for the 37th Aerospace Sciences Meeting and Exhibit sponsored by the American Institute of Aeronautics and Astronautics Reno, Nevada   In-flight aerodynamic measurements of an iced horizontal tailplane.

Experimental Investigation of the In-flight aerodynamic measurements of an iced horizontal tailplane book of the Shape of Ice Outgrowths on the Aerodynamic Characteristics of the Wing. 30 April | Journal of Engineering Physics and Thermophysics, Vol. 92, No. 2 Investigation of dynamic flight maneuvers with an iced :// Get this from a library.

In-flight aerodynamic measurements of an iced horizontal tailplane. [Thomas P Ratvasky; Judith Foss Van Zante; Lewis Research Center.] In-Flight Aerodynamic Measurements of an Iced Horizontal Tailplane dynamic flight maneuvers were performed over the full range of angles of attack and wing flap settings with each iced tailplane configuration.

This paper presents results from the quasi-steady state flight conditions and describes the range of flow fields at the horizontal   NASA/FAA Tailplane Icing Program overview.

Thomas Ratvasky, Parameter Identification of Tailplane Iced Aircraft Based on Maximum Likelihood Method. 1 July | Applied Mechanics and Materials, Vol. In-flight aerodynamic measurements of an iced horizontal :// Thomas P.

In-flight aerodynamic measurements of an iced horizontal tailplane book has written: 'In-flight aerodynamic measurements of an iced horizontal tailplane' -- subject(s): Flight characteristics, Aircraft icing, Aerodynamics, Wind tunnel tests   Iced Aircraft Flight Data for Flight Simulator Validation NASA/TM— instrumentation for cloud physics and flight dynamics measurements and 2) NASA owns and operates the rudder, and wing flaps.

The horizontal tailplane has a fixed stabilizer with an elevator and trim tab. INSTRUMENTATION SYSTEMS The research data acquisition The tailplane stall has received very little attention in aviation training venues, and because of this, it is not well understood by most pilots.

But before we explore the aerodynamics of the tailplane stall, we first have to know that the term means. A “tailplane stall” refers to the stalling of an airplane’s horizontal It was postulated that the extension of full flaps could cause an iced-up stabilizer to stall.

Flight Tests. Armed with this theory, NASA and the Airline Pilots Association decided to conduct flight tests to investigate whether full flaps on a high-wing airplane with an iced-up stabilizer could cause a tailplane   Aerodynamics of Flight Chapter 3. Figure Vector components of lift, drag, and weight (gravity).

a Lift Thrust Vertical Weight Flightpath a a Horizontal Drag Aircraft angle Forces of Flight There are four forces that act upon an aircraft during straight-and-level flight.

They are lift, gravity, thrust, and drag. Lift counters gravity Aircraft flight characteristics in icing conditions. In-flight aerodynamic measurements of an iced horizontal tailplane, AIAA PaperGoogle Scholar A.H. RonaldHelicopter flight characteristics in icing conditions.

Aeronaut. J., () (), pp. Google Scholar Based on the detailed aerodynamic measurements taken on iced airfoils and wings sinceand primarily sincethis section presents the current understanding of these flowfields.

This discussion is divided into four parts based on representative ice geometries: (1) roughness, (2) horn ice, (3) streamwise ice, and (4) spanwise-ridge :// Numerical simulations are conducted on the DHC-6 Twin Otter wing and horizontal tailplane to explore the aerodynamic penalties that affect airfoil performance in heavy rain :// Airfoil Ice-Accretion Aerodynamic Simulation.

and “iced flight baseline” (IFB). In-Flight Aerodynamic Measurements of an Iced Horizontal Tailplane. :// /_Airfoil_Ice-Accretion_Aerodynamic_Simulation. significant trim change between the united and iced horizontal stabilizer. Such a trim change can pro- vide one part of a method for detecting horizontal stabilzer icing.

Flight Test The NASA Lewis twin otter Icing Research Aircraft was used to conduct flight tests with different cases of tailplane ://. In the simulations, the longitudinal and lateral dynamics of an Airbus A aircraft model are considered, and the stability derivatives affected by icing are identified.

The simulation results show the successful NN identification of the icing parameters and the reconfigured flight dynamics having the   Secondly, in respect of tailplane stall due to ice build-up on the undersurface of the horizontal stabilizer and elevator (whether asymmetric or not).

Note that Q does not have a variable incidence tailplane: The problem is that wing and tailplane stalls have opposite recovery   Flap deflection of 0, 8, 20 and 40 degrees were tested with the clean and iced tail to investigate the effect of wing downwash on the aerodynamic performance of the clean and iced contaminated tailplane.

In general, tail stall occurred progressively earlier as the flap deflection was increased from 0 to 40 :// Розроблено методологію розрахунку параметрів пневматичної протиобледенювальної системи   The basic design was tested with the tailplane set at + 1 deg, -- 1 deg and -- 5 deg to the fuselage horizontal datum, and with the tailplane removed, but the tests on the modified designs included only the cases with the tailplane set at -- 1 deg and with the tailplane Aerodynamic Effects – Tail.

The lower surface of the horizontal tailplane is as aerodynamically critical as the upper surface of the wing. Contamination near the leading edge of the tailplane’s lower surface can cause a pitch upset. Contamination in tail-elevator gap could restrict your ability to maneuver the aircraft.

Further Information   The horizontal stabiliser, or tailplane, of an aircraft is an aerofoil that provides a downward force to overcome the aircraft's normal nose-down pitching moment.

The further forward the Centre of Gravity is from the Center of Pressure, the greater the nose down moment and, thus, the greater the amount of down-force that must be generated by This paper addresses the effects of propeller installation on the aerodynamic performance of a tailplane featuring tip-mounted propellers.

A model of a low aspect ratio tailplane equipped with an elevator and a tip-mounted propeller was installed in a low-speed ://   While the horizontal tailplane provides the necessary amount of longitudinal stability on a conventional plane, it is the wing, which stabilizes an unswept wing.

In most cases, airfoils with reflexed (s-shaped) mean lines are used on flying wing models to achieve a longitudinally stable model.

Some important Aerodynamic and Mechanical Facts   Tailplane Icing. Ice formations on the horizontal tail of certain aircraft are known to cause pitch handling problems, especially in a landing configuration.

The Twin Otter was known to have these problems, making it an ideal aircraft for investigating the aerodynamic effects of tailplane ://   Effect of Ice Accretion on Aircraft Flight Dynamics measured on natural and simulated iced aircraft is presented. A review of earlier computational methods is also included.

Then, the aircraft models for an iced accretion attached to the horizontal and vertical tail was determined, Purpose – The purpose of this paper is to maintain safe flight and to improve existing deicing (in‐flight removal of ice) and anti‐icing (prevention of ice accretion) systems under in‐flight icing conditions.

Design/methodology/approach – A recent academic research on aircraft icing phenomenon is presented. Several wind tunnel tests of an experimental aircraft provided by NASA are Cloud type or structure is determined by whether the air is stable or unstable within the layer forced upward.

When stable air is forced upward, the air tends to retain horizontal flow and any cloudiness is flat and stratified. When unstable air is forced upward, the disturbance grows, and resulting cloudiness shows "heaped" or cumulus ://   Flight Gear (present version ) Graphics Sky Clouds Main Scenery Devices Audio Joystick Flight Dynamics Module FDM Weather Flight Dynamics Module Smart Icing Systems NASA Review, JuneFlight Gear FDM JSBsim LaRCsim  › 百度文库 › 行业资料.

Full text of "[Tail Plane Icing]" which occurs due to increased angle-of-attack of the horizontal tailplane resulting in tailplane stall.

Typically, this phenomenon occurs when lowering the flaps during final approach while operating in or recently departing from icing conditions. These tests resulted in a database of the aerodynamic   No ice was found on the aircraft during a post-flight inspection but analysis by the manufacturer concluded that, from the start of the flight until the latter stages of the descent, the airflow over the horizontal tailplane and elevator was disrupted by ice ://?bookId=   The specified load may be expected in terms of aerodynamic forces, as in turns.

In level flight in undisturbed air, the wings are supporting not only the weight of the aircraft, but centrifugal force as well. As the bank steepens, the horizontal lift component increases, centrifugal force increases, and the load factor :// Most icing research focuses on the high Reynolds number regime and manned aviation.

Information on icing at low Reynolds numbers, as it is encountered by wind turbines and unmanned aerial vehicles, is less available, and few experimental datasets exist that can be used for validation of numerical tools. This study investigated the aerodynamic performance degradation on an S airfoil with 3D Blade element momentum (BEM) is the basis of blade structural studies.

The accuracy and limitations of this method in icing condition are assessed in the present study. To this purpose, a computational study on the aerodynamic performance of the full-scale NREL 5 MW rotor is :// /Wind-Turbine-Aerodynamic-Modeling-in-Icing. Cobra is not a break of aerodynamic rules, it is just a manoeuvre where the delay caused by hysteresis of vortex burst offers to the Su pilot the window to bring back the jet to horizontal flight.

Now i will tell you what features allow the Su to do the ://   simulated on the horizontal tail, pitching moment data predicts a very sudden unstable pitch break above angle of attack = This tendency models the pitch tendency described in the literature for a similar configurations with an iced horizontal tail.

Thus, a quick method has been developed to handle a full configuration with viscous ://   This page shows the parts of an airplane and their functions.

Airplanes are transportation devices which are designed to move people and cargo from one place to another. Airplanes come in many different shapes and sizes depending on the mission of the aircraft. The airplane shown on this slide is a turbine-powered airliner which has been chosen as a representative ://   B.

Balloon — In aeronautics, a balloon is an unpowered aerostat, which remains aloft or floats due to its buoyancy.A balloon may be free, moving with the wind, or tethered to a fixed point.

It is distinct from an airship, which is a powered aerostat that can propel itself through the air in a controlled manner.; Ballute — (a portmanteau of balloon and parachute) is a parachute-like braking Consideration of helicopter moments has not been necessary up to this point in the book.

To go further we need to define the functions of the horizontal tailplane and vertical fin and the nature of direct head moment. 1 This chapter makes liberal use of unpublished papers by B.

Pitkin, Flight Mechanics Specialist, Westland   In fluid dynamics, a stall is a reduction in the lift coefficient generated by a foil as angle of attack increases. This occurs when the critical angle of attack of the foil is exceeded.

The critical angle of attack is typically about 15 degrees, but it may vary significantly depending on the fluid, foil, and Reynolds number. Stalls in fixed-wing flight are often experienced as a sudden (aviation). The basic requirements for wing design are associated with performance and operational aspects, flying characteristics and handling, structural design and considerations of general layout design.

C L in flight condition with horizontal fuselage reference line \({C_{{L_\alpha }}}\) dC L /dα lift-curve slope. C p. horizontal tailplane. n   Prelims-Htex 11/7/ 13 Page v Contents Preface to the first edition ix Preface to the second edition xi Acknowledgements xiii Nomenclature xv 1.

Introduction 1 Ov~scp/scp/ocw/aerospace/AEAircraft flight dynamics.