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Friday, May 15, 2020 | History

3 edition of Summary of studies to reduce wing-mounted propfan installation drag on an M=0.8 transport found in the catalog.

Summary of studies to reduce wing-mounted propfan installation drag on an M=0.8 transport

Ronald C. Smith

Summary of studies to reduce wing-mounted propfan installation drag on an M=0.8 transport

by Ronald C. Smith

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  • 30 Currently reading

Published by National Aeronautics and Space Administration, Scientific and Technical Information Branch, For sale by the National Technical Information Service] in [Washington, D.C.], [Springfield, Va .
Written in English

    Subjects:
  • Transport planes.,
  • Drag (Aerodynamics)

  • Edition Notes

    StatementRonald C. Smith, Alan D. Levin, and Richard D. Wood.
    SeriesNASA technical paper -- 2678.
    ContributionsLevin, Alan D., Wood, Richard D., United States. National Aeronautics and Space Administration. Scientific and Technical Information Branch.
    The Physical Object
    FormatMicroform
    Pagination1 v.
    ID Numbers
    Open LibraryOL17658577M

    Inspired by flight in nature, work done by Lippisch, the Hortens, and Northrop offered a chance at achieving the efficiency of bird flight with swept-wing tailless aircraft. Tailless designs have been forced incorporate aerodynamic compromises for control, which have inhibited potential advantages. There are several big advantages in the "Blended Wing & Fuselage" design, the most important being the ‘Lift to Drag’ ratio which is expected to increase by an amazing 50%, resulting in an overall weight reduction of the aircraft by 25%, making it an estimated 33% more fuel efficient than the A, and thus making the Airbus's $13 Billion Dollar investment look pretty shaky.

    Question: A Man Attempts To Support A Stack Of Books Horizontally By Applying A Compressive Force Of F = N To The Ends Of The Stack With His Hands. Each Book Has A Mass Of Kg. The Coefficient Of Static Friction Between His Hands And A Book Is (?s)h = And Between Any Two Books (?s)b = Join Chegg Study and get: In studying the flow of a fluid around an object (such as an airplane wing), there arises a quantity called the drag coefficient, which is defined as C_F = F/(1/2 rho v^2 L^2). In this equation, F is. It is tied to the transport using chain DE. Draw the free-body diagram of the top truck; be sure to include.

    Report discussing an investigation to determine the drag of a configuration with a body of fitness ratio 12 with stabilizing tail surfaces and a percent-thick degree swept-forward wing using the free-fall method. The drag oft he wing and the total drag were measured separately and compared. The swept-forward wing was found to greatly increase the effect of drag on the body-tail combination. In this paper, flapping-wing propulsion as a means of drag reduction for light sailplanes is investigated numerically. The feasibility of markedly improving minimum sink and L/D max performance parameters in light sailplanes by flapping their flexible, high aspect ratio wings at their natural frequencies is considered.


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Summary of studies to reduce wing-mounted propfan installation drag on an M=0.8 transport by Ronald C. Smith Download PDF EPUB FB2

Studies, showed vastly improved performance for the modified-wing configuration. The installed power plant drag was reduced from 20% to 5% of the total airplane drag. Both wing-mounted configurations caused unstable pitching moments in combination with a negative shift in Cmo of about A brief unpowered.

Get this from a library. Summary of studies to reduce wing-mounted propfan installation drag on an M= transport. [Ronald C Smith; Alan D Levin; Richard D Wood; United States.

National Aeronautics and Space Administration. Scientific and Technical Information Branch.]. Summary of studies to reduce wing-mounted propfan installation drag on an M = transport / By Ronald C. (Ronald Carlton) Smith, Richard D.

Wood, Alan D. Levin and Ames Research Center. Abstract. Results of the tests indicate a large reduction in installed drag for the modified configuration. The wing-mounted power plant caused destabilizing pitching moments. Kulfan’s [35] hybrid approach using both CFD(panel) and far-field method is used to optimize the drag of the supersonic transport aircraft as shown in Fig.

More specifically, sting correction of wind-tunnel experiment [36] had been conducted which is importantly considered in the previous part. The data in Fig. 10 show fuel savings of turboprop (or propfan) aircraft relative to turbofan aircraft.

Because of different study aircraft configuration assumptions, the propfan aircraft fuel savings range from 8 to 28 Vo for a stage length. The largest fuel saving is for the propfan derivative. Powerplant installation losses for an advanced, high-speed, turboprop transport have been investigated in the Ames Research Center Transonic Wind Tunnels as a part of the NASA Advanced Turboprop.

Analysis of stationary deformation behavior of a semi-infinite rigid-perfect plastic beam subjected to moving distributed loads of finite width to reduce wing-mounted propfan installation drag.

His book on aircraft preliminary design provides more information on the importance of high-lift design for transport jets.

Wing-mounted engine nacelles, while very attractive for overall configuration loadability and ease of maintenance, usually involve the use of structural struts or pylons, which have a significant effect on the flow around. Installation Drag'; this is tho external normal-prcssuro drag caused by adding number of the whole aircraft was l-2 but, in order to reduce the risk of a drag peck at sonic spood, tho area-rule calculations NerG bnsod on a design Mach number of the wing-mounted nacelles, but no ccrmpensation vas made for the nacelles on.

The investigation was conducted at Mach numbers from to and jet total-pressure ratios from 3 to Three different boattails were tested: an 8-degree conical afterbody, a 16degree circular-arc afterbody, and a third afterbody having a linear area variation with length.

A cylindrical afterbody also was tested for comparison purposes. Full text of "NASA Technical Reports Server (NTRS) Advanced Propfan Engine Technology (APET) definition study, single and counter-rotation gearbox/pitch change mechanism design" See other formats. Induced drag is directly driven by the span load that the aircraft is flying at.

The tools by which to calculate and predict induced drag we use were created by Ludwig Prandtl in Within a decade after Prandtl created a tool for calculating induced drag, Prandtl and his students had optimized the problem to solve the minimum induced drag for a wing of a given span, formalized and written Reviews: 1.

ON THE EFFECTS OF A INSTALLED PROPELLER SLIPSTREAM ON A WING BOUNDARY LAYER Figure 2 Force and Moment Test Set-up for the pusher case. Tractor set-up: The same Wortmann FX profile was used to construct the two wings with a chord of m These two wings were attached to the nacelle which had a cylindrical shape, Fig.

The nacelle is. Chapter 4 - Small Fixed Wing Aircraft Operational Weight and Balance Computations Weight and balance data allows the pilot to determine the loaded weight of the aircraft and determine whether or not the loaded CG is within the allowable range for the weight.

Figure Weight. Filed under: V Osprey (Transport plane) The V Osprey: costs, capabilities, and challenges: hearing before the Committee on Oversight and Government Reform, House of Representatives, One Hundred Eleventh Congress, first session, J Drag versus speed.

Drag Speed of the flow increases with distance from the surface until the P a r a s i t e d r a g Figure Streamlined airfoil designs greatly reduce form drag by reducing the amount of airflow separation. Streamlined shape: 10% of the form drag of a flat plate H L L Cylinder: 50% of the form drag of a flat plate Flat plate.

Fundamentals of Flight. STUDY. PLAY. How many types of motion are there pertaining to flight. Acceleration. The rate of change of the speed and or velocity of matter with time. Drag. The force that tends to hold the aircraft back. Thrust. Force that acts in the forward direction produced by the engine.

With the Transport Wing in the E.T.O. [Unit historian] on *FREE* shipping on qualifying offers. With the Transport Wing in the E.T.O. When a type rating is to be added to an airline transport pilot certificate, and the practical test is schedule in an approved flight simulator and an aircraft, the applicant is Required to have at least a current third class medical certificate.

effect on the configuration of modern transport aircraft. For the present over-the-wing engine mount configuration, however, the engine is positioned aft of the elastic axis of the wing and the aeroelastic characteristics are, therefore, considered to be critical.

Also the aerodynamic effect on the flutter.Summary of the Geometry, Weight, Drag Polar, and Performance Sizing Data for the Mega-Transport 71 Nondimensional Stability and Control Derivatives for the Mega-Transport 74 Longitudinal Transfer Functions for the Mega-Transport - Cruise Condition 77 ix.Installation Guide # Wing Extension and Spar Reinforcement Installation For Cessnaand models modified in accordance with Transport Canada STC SA and FAA STC SANY.

Issue # 9, Nov. 14, Page 1 of 23 Qualified aviation maintenance personnel must perform the procedures documented herein.

All.