Copyright 2008-Purdue University

Slides:

Advertisements

Similar presentations

Vector Operations in R 3 Section 6.7. Standard Unit Vectors in R 3 The standard unit vectors, i(1,0,0), j(0,1,0) and k(0,0,1) can be used to form any.

Advertisements

Lift Coefficient & Lift Quantity Momentum, Flaps, Slots, Slats,& Spoilers Lecture 5 Chapter 2.

Aircraft Motion and Control

Lecture # 3 Airfoil Aerodynamics.

Basic Aerodynamic Theory

Basic Aerodynamics and Stability Presented by: Mr Jamie Presser.

Lesson 37 Longitudinal Static Stability

Lesson 13 Airfoils Part II

Aero Engineering 315 Lesson 12 Airfoils Part I. First things first…  Recent attendance  GR#1 review  Pick up handout.

Aerodynamic Theory Review 3

School of Aviation Safety

2D Airfoil Aerodynamics

ITA – Instituto Tecnológico de Aeronáutica

AirfoilCambered Camber (% Ch)3 Thickness (% Ch)8 Chord (m)2 Span (m)10 Surface Area (m2) 20 Angle of attack (deg) -5 AtmosphereStd. Earth Cp Distribution.

February 24, Dynamics & Controls 1 PDR Michael Caldwell Jeff Haddin Asif Hossain James Kobyra John McKinnis Kathleen Mondino Andrew Rodenbeck Jason.

Theory of Flight All are demonstrated by the flight of the bird!

ROTARY WING AERODYNAMICS

Purdue Aeroelasticity

AAE 556 Aeroelasticity Lecture 12

Purdue Aeroelasticity 4-1 AAE 556 Aeroelasticity Lecture 4 Reading:

AAE 556 Aeroelasticity Lecture 7 – Control effectiveness (2)

“Adde parvum parvo magnus acervus erir” Ovid Purdue Aeroelasticity

AAE 556 Aeroelasticity Lecture 17

AAE 556 Aeroelasticity Lecture 12

Purdue Aeroelasticity

AAE 556 Aeroelasticity Lecture 11 Swept wing aeroelasticity Reading Sections 3.1 through Purdue Aeroelasticity.

Aeroelasticity (made simple)

AAE 556 Aeroelasticity Lecture 28, 29,30-Unsteady aerodynamics 1 Purdue Aeroelasticity.

AAE 556 Aeroelasticity Lecture 23 Representing motion with complex numbers and arithmetic 1 Purdue Aeroelasticity.

© 2009 Aviation Supplies & Academics, Inc. All Rights Reserved. The Pilot’s Manual – Ground School Aerodynamics Chapter 1 Forces Acting on an Airplane.

AAE556 – Spring Armstrong AAE 556 Aeroelasticity Lecture 5 Reading: text pp

Purdue Aeroelasticity

AAE556 Lectures 34,35 The p-k method, a modern alternative to V-g Purdue Aeroelasticity 1.

Transportation Unit 3 - Flight. Introduction Fixed Wing Heavier than air, atmospheric transportation vehicles sustain flight by utilizing the scientific.

AAE 556 Aeroelasticity Lecture 6-Control effectiveness

The concept of the airfoil (wing section)

Purdue Aeroelasticity

Short introduction to aeroelasticity

CGS Ground School Principles Of Flight Controls © Crown Copyright 2012

AAE 556 Aeroelasticity Lecture 6

Airfoil Any surface that provides aerodynamic force through interaction with moving air Aerodynamic force (lift) Moving air Airfoil.

AAE 556 Aeroelasticity Lectures 22, 23

Purdue Aeroelasticity

Presentation on Optical Computing

Purdue Aeroelasticity

Purdue Aeroelasticity

AAE 556 Aeroelasticity Lecture 6 – Multi-DOF systems

c/Maj Christopher Greves

Gliders and Flight David Wagner.

Pre-Solo Training Program

AAE 556 Aeroelasticity Lecture 7-Control effectiveness

Theory and its application

Purdue Aeroelasticity

Purdue Aeroelasticity

Alfred Lynam February 21, 2008 Dynamics and Control D&C simulation code compatibility test with trajectory code. AAE 450 Spring 2008 Dynamics and Control.

AAE 556 Aeroelasticity Lecture 22

Purdue Aeroelasticity

Purdue Aeroelasticity

Grab their Attention with Active Learning!

AAE 556 Aeroelasticity Lecture 8

AAE 556 Aeroelasticity Lectures 10 and 11

AAE 556 Aeroelasticity Lecture 10

AAE 556 Aeroelasticity Lecture 9

AAE 556 Aeroelasticity Lecture 13

AAE 556 Aeroelasticity Lecture 14

Forging new generations of engineers

Dynamics & Controls PDR 2

Multi-degree-of-freedom systems

AAE 556 Aeroelasticity Lecture 4

Presentation transcript:

Copyright 2008-Purdue University AAE 556 Aeroelasticity Control effectiveness-part 2 11/23/2018 Copyright 2008-Purdue University AAE556 – Spring 2008 - 8

Copyright 2008-Purdue University Summary Control surfaces generate less lift because the control deflection creates a nose-down pitching moment as it generates lift. At a special dynamic pressure (a combination of airspeed and altitude) the deflection of an aileron creates more downward lift due to nose-down deflection than upward lift 11/23/2018 Copyright 2008-Purdue University AAE556 – Spring 2008 - 8

Two different ways to compute the pressure distribution resultants 11/23/2018 Copyright 2008-Purdue University AAE556 – Spring 2008 - 8

Copyright 2008-Purdue University Force equivalence definition producing the same effect with different models Solve for the distance d from the AC = Ld d e A lift force at d produces the same result as a lift force and moment at the AC 11/23/2018 Copyright 2008-Purdue University AAE556 – Spring 2008 - 8

Resultant lift position mid-chord small flap Distance aft of 1/4 chord big flap AC Flap to chord ratio 11/23/2018 Copyright 2008-Purdue University AAE556 – Spring 2008 - 8

Reversal in terms of divergence parameters 11/23/2018 Copyright 2008-Purdue University AAE556 – Spring 2008 - 8

Copyright 2008-Purdue University lift effectiveness expression when divergence dynamic pressure is less than reversal <1 11/23/2018 Copyright 2008-Purdue University AAE556 – Spring 2008 - 8

Plots of aileron effectiveness as functions of reversal q when R<1 11/23/2018 Copyright 2008-Purdue University AAE556 – Spring 2008 - 8

Aileron effectiveness when R>1 11/23/2018 Copyright 2008-Purdue University AAE556 – Spring 2008 - 8

Summary aileron deflection creates ... (a shift in zero lift line due to "camber" created by control surface deflection) twisting downward if lift vector due control deflection is behind section shear center downward 11/23/2018 Copyright 2008-Purdue University AAE556 – Spring 2008 - 8

Torsional divergence a classical model Idealizations 11/23/2018 Copyright 2008-Purdue University AAE556 – Spring 2008 - 8

Copyright 2008-Purdue University 11/23/2018 Copyright 2008-Purdue University AAE556 – Spring 2008 - 8

Copyright 2008-Purdue University 11/23/2018 Copyright 2008-Purdue University AAE556 – Spring 2008 - 8

Copyright 2008-Purdue University 11/23/2018 Copyright 2008-Purdue University AAE556 – Spring 2008 - 8

Copyright 2008-Purdue University 11/23/2018 Copyright 2008-Purdue University AAE556 – Spring 2008 - 8

Copyright 2008-Purdue University 11/23/2018 Copyright 2008-Purdue University AAE556 – Spring 2008 - 8

Copyright 2008-Purdue University Divergence 11/23/2018 Copyright 2008-Purdue University AAE556 – Spring 2008 - 8

Copyright 2008-Purdue University 11/23/2018 Copyright 2008-Purdue University AAE556 – Spring 2008 - 8