Scale Model Helicopters PDF Download
Are you looking for read ebook online? Search for your book and save it on your Kindle device, PC, phones or tablets. Download Scale Model Helicopters PDF full book. Access full book title Scale Model Helicopters by Sean Brown. Download full books in PDF and EPUB format.
Author: Sean Brown
Publisher:
ISBN: 9781900371810
Category : Helicopters
Languages : en
Pages : 94
Get Book Here
Book Description
Author: Sean Brown
Publisher:
ISBN: 9781900371810
Category : Helicopters
Languages : en
Pages : 94
Get Book Here
Book Description
Author: Malcolm Messiter
Publisher: Traplet Publications
ISBN: 9781900371834
Category : Helicopters
Languages : en
Pages : 52
Get Book Here
Book Description
"This concise booklet guides the beginner through every aspect of getting started ion building, maintaining, and flying radio controlled model helicopters. ..."--Back cover.
Author: Sung K. Kim
Publisher:
ISBN:
Category :
Languages : en
Pages : 234
Get Book Here
Book Description
Author: Ioannis A. Raptis
Publisher: Springer Science & Business Media
ISBN: 9400700237
Category : Technology & Engineering
Languages : en
Pages : 210
Get Book Here
Book Description
There has been significant interest for designing flight controllers for small-scale unmanned helicopters. Such helicopters preserve all the physical attributes of their full-scale counterparts, being at the same time more agile and dexterous. This book presents a comprehensive and well justified analysis for designing flight controllers for small-scale unmanned helicopters guarantying flight stability and tracking accuracy. The design of the flight controller is a critical and integral part for developing an autonomous helicopter platform. Helicopters are underactuated, highly nonlinear systems with significant dynamic coupling that needs to be considered and accounted for during controller design and implementation. Most reliable mathematical tools for analysis of control systems relate to modern control theory. Modern control techniques are model-based since the controller architecture depends on the dynamic representation of the system to be controlled. Therefore, the flight controller design problem is tightly connected with the helicopter modeling. This book provides a step-by-step methodology for designing, evaluating and implementing efficient flight controllers for small-scale helicopters. Design issues that are analytically covered include: • An illustrative presentation of both linear and nonlinear models of ordinary differential equations representing the helicopter dynamics. A detailed presentation of the helicopter equations of motion is given for the derivation of both model types. In addition, an insightful presentation of the main rotor's mechanism, aerodynamics and dynamics is also provided. Both model types are of low complexity, physically meaningful and capable of encapsulating the dynamic behavior of a large class of small-scale helicopters. • An illustrative and rigorous derivation of mathematical control algorithms based on both the linear and nonlinear representation of the helicopter dynamics. Flight controller designs guarantee that the tracking objectives of the helicopter's inertial position (or velocity) and heading are achieved. Each controller is carefully constructed by considering the small-scale helicopter's physical flight capabilities. Concepts of advanced stability analysis are used to improve the efficiency and reduce the complexity of the flight control system. Controller designs are derived in both continuous time and discrete time covering discretization issues, which emerge from the implementation of the control algorithm using microprocessors. • Presentation of the most powerful, practical and efficient methods for extracting the helicopter model parameters based on input/output responses, collected by the measurement instruments. This topic is of particular importance for real-life implementation of the control algorithms. This book is suitable for students and researches interested in the development and the mathematical derivation of flight controllers for small-scale helicopters. Background knowledge in modern control is required.
Author: Susan Althoff Gorton
Publisher:
ISBN:
Category : Helicopters
Languages : en
Pages : 32
Get Book Here
Book Description
Development of advanced rotorcraft configurations has highlighted a need for high-quality experimental data to support the development of flexible and accurate analytical design tools. To provide this type of data, a test program was conducted in the Langley 14- by 22-Foot Subsonic Tunnel to measure the flow near the empennage of a 15-percent scale powered helicopter model with an operating tail fan. Three-component velocity profiles were measured with laser velocimetry (LV) one chord forward of the horizontal tail for four advance ratios to evaluate the effect of the rotor wake impingement on the horizontal tail angle of attack. These velocity data indicate the horizontal tail can experience unsteady angle of attack variations of over 30 degress due to the rotor wake influence. The horizontal tail is most affected by the rotor wake above advance ratios of 0.10. Velocity measurements of the flow on the inlet side of the tail fan were made for a low-speed flight condition using conventional LV techniques. The velocity data show an accelerated flow near the tail fan duct, and vorticity calculations track the passage of main rotor wake vortices through the measurement plane.
Author: Michael Anthony Capasso
Publisher:
ISBN:
Category :
Languages : en
Pages : 0
Get Book Here
Book Description
This thesis reports on the construction of a 1/12th scale model of the award winning Arapaho attack helicopter design and wind tunnel test to determine both the model and full scale equivalent flat plate area. Tests were conducted for lg level flight and included yawed flight conditions up to 10 degrees. The significance of equivalent flat plate area for helicopters is that it is the principal parameter that establishes rotor propulsive force requirements. The Model was constructed from the original design submitted by the 1993 NPS Helicopter Design Team and is 47.5 inches long with a 48-inch main rotor diameter. The model was tested in the NPS Low Speed Wind Tunnel to measure the drag force on the main body of the model at wind tunnel velocities up to 72 knots. Drag force on the model was also measured with the rotor head and longbow radome installed, and at various yaw angles up to 10 degrees. The equivalent flat plate area was then calculated from these measurements and compared to other helicopters. Recommendations for further wind tunnel testing were made.
Author: Bernard Mettler
Publisher: Springer Science & Business Media
ISBN: 1475737858
Category : Technology & Engineering
Languages : en
Pages : 237
Get Book Here
Book Description
Identification Modeling and Characteristics of Miniature Rotorcraft introduces an approach to developing a simple and effective linear parameterized model of vehicle dynamics using the CIFERâ identification tool created by the Army/NASA Rotorcraft Division. It also presents the first application of the advanced control system optimization tool CONDUITâ to systematically and efficiently tune control laws for a model-scale UAV helicopter against multiple and competing dynamic response criteria. Identification Modeling and Characteristics of Miniature Rotorcraft presents the detailed account of how the theory was developed, the experimentation performed, and how the results were used. This book will serve as a basic and illustrative guide for all students that are interested in developing autonomous flying helicopters.
Author: Russ Deakin
Publisher: Verlag für Technik und Handwerk
ISBN:
Category : Crafts & Hobbies
Languages : en
Pages : 301
Get Book Here
Book Description
Here the helicopter model pilot is guided from his first sightseeing flights to full-fledged aerobatics. Whether the goal is to specialize in the championship scene, scale or 3D aerobatics, or simply to pursue high-quality model flying, to realize one's full aeronautical potential, one needs sound guidance such as this. Based on his own extensive experience, Russ Deakin outlines what characteristics a helicopter must meet, what RC equipment is needed, how to set up and maintain the model. He reveals the secrets of modern remote controls and gyros, and describes how to set up or tune both the model and the motor. This is followed by a detailed training program that starts with the flying basics and leads step by step to sightseeing flights, nose hovering and other demanding hovering maneuvers. Finally, you'll dive into the incredibly exciting world of model helicopter aerobatics. Here, it is explained how to safely perform autorotation, fly loops, and succeed in turns. With its easy-to-understand text and more than 180 illustrations, this book is a valuable resource that will guide readers safely and confidently from their first sightseeing flights to any desired discipline of challenging model helicopter flying.
Author:
Publisher:
ISBN:
Category : Helicopters
Languages : en
Pages : 26
Get Book Here
Book Description
Author: Bernard Mettler
Publisher:
ISBN:
Category : Flight control
Languages : en
Pages : 25
Get Book Here
Book Description
Abstract: "Development of a reliable high-performance helicopter-based unmanned aerial vehicle (UAV) requires an accurate and practical model of the vehicle dynamics. This report describes the process and results of the dynamic modeling of a model-scale unmanned helicopter (Yamaha R-50 with 10 ft rotor diameter) using system identification. A complete dynamic model was derived for both hover and cruise flight conditions. In addition to standard helicopter flight characteristics, the model explicitly accounts for the stabilizer bar, which has a strong influence on the flight dynamics and is widely used in model-scale helicopters. The accuracy of the developed model is verified by the comparison between predicted and actual responses from the model and the flight experiments (in both frequency and time domains), and between key identified parameters and their theoretical values. Scaling of the main characteristics of the R-50 model-scale helicopter with respect to those of a UH-1H full-size helicopter was performed to determine how the size influences the flight dynamics of helicopters."
