Author: Ian P. Tracy
Publisher:
ISBN:
Category :
Languages : en
Pages : 47
Book Description
An experimental study was performed to design and analyze a "pusher" propeller for use by a small, expendable, autonomous unmanned aerial vehicle (UAV) whose mission was to descend from 30,000 feet to sea level at an approximately constant descent rate over a 3-hour mission duration. The entire propeller design process, from airfoil selection to final part generation in the computer-aided drafting program SolidWorks is described. QMIL and QPROP were the programs of choice for producing a propeller design focused on yielding minimum induced losses for optimal aerodynamic efficiency given a conservative aerodynamic design point. The TA22 airfoil defined the propeller cross section and NEU-012-030-4000 DC brushless motor was selected to power the propeller. The initial propeller design was modified to comply with size constraints set by the mission. Wind tunnel tests were conducted to determine the effect of fuselage blanketing on propeller performance. Of particular interest was comparing the power required to propel the aircraft at a given airspeed for a configuration in which the propeller was mounted behind the fuselage, and one in which the propeller was not obstructed by an upstream object and instead isolated in the incoming airstream. It was empirically found that fuselage blanketing had a significantly detrimental impact on each of the 4 propellers used in testing. It was therefore recommended that the hub section of the propeller be redesigned to mitigate drag and propulsive losses resulting from reduced momentum in the blanketed region of the propeller. This recommendation was applied to the included propeller design and propeller betas in the hub region were reduced using qualitative methods.
Propeller Design and Analysis for a Small, Autonomous UAV
Author: Ian P. Tracy
Publisher:
ISBN:
Category :
Languages : en
Pages : 47
Book Description
An experimental study was performed to design and analyze a "pusher" propeller for use by a small, expendable, autonomous unmanned aerial vehicle (UAV) whose mission was to descend from 30,000 feet to sea level at an approximately constant descent rate over a 3-hour mission duration. The entire propeller design process, from airfoil selection to final part generation in the computer-aided drafting program SolidWorks is described. QMIL and QPROP were the programs of choice for producing a propeller design focused on yielding minimum induced losses for optimal aerodynamic efficiency given a conservative aerodynamic design point. The TA22 airfoil defined the propeller cross section and NEU-012-030-4000 DC brushless motor was selected to power the propeller. The initial propeller design was modified to comply with size constraints set by the mission. Wind tunnel tests were conducted to determine the effect of fuselage blanketing on propeller performance. Of particular interest was comparing the power required to propel the aircraft at a given airspeed for a configuration in which the propeller was mounted behind the fuselage, and one in which the propeller was not obstructed by an upstream object and instead isolated in the incoming airstream. It was empirically found that fuselage blanketing had a significantly detrimental impact on each of the 4 propellers used in testing. It was therefore recommended that the hub section of the propeller be redesigned to mitigate drag and propulsive losses resulting from reduced momentum in the blanketed region of the propeller. This recommendation was applied to the included propeller design and propeller betas in the hub region were reduced using qualitative methods.
Publisher:
ISBN:
Category :
Languages : en
Pages : 47
Book Description
An experimental study was performed to design and analyze a "pusher" propeller for use by a small, expendable, autonomous unmanned aerial vehicle (UAV) whose mission was to descend from 30,000 feet to sea level at an approximately constant descent rate over a 3-hour mission duration. The entire propeller design process, from airfoil selection to final part generation in the computer-aided drafting program SolidWorks is described. QMIL and QPROP were the programs of choice for producing a propeller design focused on yielding minimum induced losses for optimal aerodynamic efficiency given a conservative aerodynamic design point. The TA22 airfoil defined the propeller cross section and NEU-012-030-4000 DC brushless motor was selected to power the propeller. The initial propeller design was modified to comply with size constraints set by the mission. Wind tunnel tests were conducted to determine the effect of fuselage blanketing on propeller performance. Of particular interest was comparing the power required to propel the aircraft at a given airspeed for a configuration in which the propeller was mounted behind the fuselage, and one in which the propeller was not obstructed by an upstream object and instead isolated in the incoming airstream. It was empirically found that fuselage blanketing had a significantly detrimental impact on each of the 4 propellers used in testing. It was therefore recommended that the hub section of the propeller be redesigned to mitigate drag and propulsive losses resulting from reduced momentum in the blanketed region of the propeller. This recommendation was applied to the included propeller design and propeller betas in the hub region were reduced using qualitative methods.
Optimizing Small Multi-Rotor Unmanned Aircraft
Author: Stephen D. Prior
Publisher: CRC Press
ISBN: 0429766769
Category : Technology & Engineering
Languages : en
Pages : 129
Book Description
This design guide was written to capture the author’s practical experience of designing, building and testing multi-rotor drone systems over the past decade. The lack of one single source of useful information meant that the past 10 years has been a steep learning curve, a lot of self-tuition and many trial and error tests. Lessons learnt the hard way are not always the best way to learn. This book will be useful for the amateur drone pilot who wants to build their own system from first principles, as well as the academic researcher investigating novel design concepts and future drone applications.
Publisher: CRC Press
ISBN: 0429766769
Category : Technology & Engineering
Languages : en
Pages : 129
Book Description
This design guide was written to capture the author’s practical experience of designing, building and testing multi-rotor drone systems over the past decade. The lack of one single source of useful information meant that the past 10 years has been a steep learning curve, a lot of self-tuition and many trial and error tests. Lessons learnt the hard way are not always the best way to learn. This book will be useful for the amateur drone pilot who wants to build their own system from first principles, as well as the academic researcher investigating novel design concepts and future drone applications.
Aerodynamic Design and Analysis of Propellers for Mini-remotely Piloted Air Vehicles: Ducted propellers
Author: Henry V. Borst
Publisher:
ISBN:
Category : Drone aircraft
Languages : en
Pages : 158
Book Description
Publisher:
ISBN:
Category : Drone aircraft
Languages : en
Pages : 158
Book Description
Propeller Design and Analysis for an Unmanned Aeronautical Vehicle
Author: Preston Buyers Schmauch
Publisher:
ISBN:
Category :
Languages : en
Pages : 144
Book Description
Publisher:
ISBN:
Category :
Languages : en
Pages : 144
Book Description
Aerodynamic Design and Analysis of Propellers for Mini-remotely Piloted Air Vehicles: Open propellers
Author: Henry V. Borst
Publisher:
ISBN:
Category : Drone aircraft
Languages : en
Pages : 270
Book Description
Publisher:
ISBN:
Category : Drone aircraft
Languages : en
Pages : 270
Book Description
Aerodynamic Design and Analysis of Propellers for Mini-remotely Piloted Air Vehicles
Author:
Publisher:
ISBN:
Category : Drone aircraft
Languages : en
Pages :
Book Description
Publisher:
ISBN:
Category : Drone aircraft
Languages : en
Pages :
Book Description
Aerodynamic Design and Analysis of Propellers for Mini-remotely Piloted Air Vehicles
Author: Henry V. Borst
Publisher:
ISBN:
Category :
Languages : en
Pages :
Book Description
Publisher:
ISBN:
Category :
Languages : en
Pages :
Book Description
Small Unmanned Aircraft
Author: Randal W. Beard
Publisher: Princeton University Press
ISBN: 1400840600
Category : Technology & Engineering
Languages : en
Pages : 317
Book Description
Autonomous unmanned air vehicles (UAVs) are critical to current and future military, civil, and commercial operations. Despite their importance, no previous textbook has accessibly introduced UAVs to students in the engineering, computer, and science disciplines--until now. Small Unmanned Aircraft provides a concise but comprehensive description of the key concepts and technologies underlying the dynamics, control, and guidance of fixed-wing unmanned aircraft, and enables all students with an introductory-level background in controls or robotics to enter this exciting and important area. The authors explore the essential underlying physics and sensors of UAV problems, including low-level autopilot for stability and higher-level autopilot functions of path planning. The textbook leads the student from rigid-body dynamics through aerodynamics, stability augmentation, and state estimation using onboard sensors, to maneuvering through obstacles. To facilitate understanding, the authors have replaced traditional homework assignments with a simulation project using the MATLAB/Simulink environment. Students begin by modeling rigid-body dynamics, then add aerodynamics and sensor models. They develop low-level autopilot code, extended Kalman filters for state estimation, path-following routines, and high-level path-planning algorithms. The final chapter of the book focuses on UAV guidance using machine vision. Designed for advanced undergraduate or graduate students in engineering or the sciences, this book offers a bridge to the aerodynamics and control of UAV flight.
Publisher: Princeton University Press
ISBN: 1400840600
Category : Technology & Engineering
Languages : en
Pages : 317
Book Description
Autonomous unmanned air vehicles (UAVs) are critical to current and future military, civil, and commercial operations. Despite their importance, no previous textbook has accessibly introduced UAVs to students in the engineering, computer, and science disciplines--until now. Small Unmanned Aircraft provides a concise but comprehensive description of the key concepts and technologies underlying the dynamics, control, and guidance of fixed-wing unmanned aircraft, and enables all students with an introductory-level background in controls or robotics to enter this exciting and important area. The authors explore the essential underlying physics and sensors of UAV problems, including low-level autopilot for stability and higher-level autopilot functions of path planning. The textbook leads the student from rigid-body dynamics through aerodynamics, stability augmentation, and state estimation using onboard sensors, to maneuvering through obstacles. To facilitate understanding, the authors have replaced traditional homework assignments with a simulation project using the MATLAB/Simulink environment. Students begin by modeling rigid-body dynamics, then add aerodynamics and sensor models. They develop low-level autopilot code, extended Kalman filters for state estimation, path-following routines, and high-level path-planning algorithms. The final chapter of the book focuses on UAV guidance using machine vision. Designed for advanced undergraduate or graduate students in engineering or the sciences, this book offers a bridge to the aerodynamics and control of UAV flight.
Analysis and Design of a Low Reynolds Propeller for Optimal Unmanned Aerial Vehicle (UAV) Flight
Author: Alan Mushynski
Publisher:
ISBN:
Category : Aerodynamics
Languages : en
Pages : 158
Book Description
Publisher:
ISBN:
Category : Aerodynamics
Languages : en
Pages : 158
Book Description
Aerodynamic Design and Analysis of Propellers for Mini-Remotely Piloted Air Vehicles. Volume 1 Open Propellers
Author: Henry V. Borst
Publisher:
ISBN:
Category :
Languages : en
Pages : 131
Book Description
This report prsents the design and anlysis of propellers applied to mini-remotely piloted vehicles. Modifications to the airfoil data used for predicting the profile drag losses were necessary to account for operation at the low reynolds number encountered by mini-RPV propellers. Due to the lack of two-dimensional airfoil data, the correction to the drag coefficient is ' Using the revised methods of propeller analysis, six optimum propellers were designed and analyzed for two different RPV's. The analysis showed that improved performance can be obtained with the new designs. A ducted propeller with sufficiently low blade tip clearances was also analyzed. This configuration appears to have superior performance to the open type propellers considered, as well as a potential for reduced noise. Propellers with variable blade angles also appear to offer advantages from both the noise and performance standpoints. Volume II presents the ducted-propeller design for the Mini-RPV.
Publisher:
ISBN:
Category :
Languages : en
Pages : 131
Book Description
This report prsents the design and anlysis of propellers applied to mini-remotely piloted vehicles. Modifications to the airfoil data used for predicting the profile drag losses were necessary to account for operation at the low reynolds number encountered by mini-RPV propellers. Due to the lack of two-dimensional airfoil data, the correction to the drag coefficient is ' Using the revised methods of propeller analysis, six optimum propellers were designed and analyzed for two different RPV's. The analysis showed that improved performance can be obtained with the new designs. A ducted propeller with sufficiently low blade tip clearances was also analyzed. This configuration appears to have superior performance to the open type propellers considered, as well as a potential for reduced noise. Propellers with variable blade angles also appear to offer advantages from both the noise and performance standpoints. Volume II presents the ducted-propeller design for the Mini-RPV.