Thank you to Adam Benabbou and Sean Sawaya for designing and constructing a new wing for the SPA aircraft. This wing uses the SD7062 airfoil with a balsa and spruce wing structure covered with Monokote. I am looking forward to a series of interesting missions with this aircraft-wing combination.
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On 19 March 2018, a tornado hit Jacksonville State University’s campus. The tornado caused widespread damage across the entire campus and the surrounding neighborhoods. The tornado was a direct hit through the quad, library, and almost all major buildings.
The Remote Sensing Center was asked to provide post tornado damage assessment of the campus buildings. We (Tim Leopard, Chris R. Simpson, and I) flew a series of flights over the campus. We wish JSU the best; we hope these helped.
The Civil Engineering CE 260 “Surveying” instructor for the Fall of 2017 asked me to give a guest lecture and flight demonstration of UAVs for civil engineering applications. The class began with a short lecture (CE260-UAV) and then transitioned to Bryce Lawn for a demonstration flight over the University of Alabama’s old chapel building. My laboratory took the photos and created a 3D reconstruction of the building suitable for civil engineering analysis.
We concluded with an aerial class photo.
Thank you to the CE 260 class and the Civil Engineering department, especially Profs. Graettinger and Stogner.
For reference, the full raw flight video is here. The careful viewer should note that this flight was conducted in accordance with FAA regulations and University of Alabama requirements. Please don’t replicate this flight without first talking to UA compliance, UA Grounds, and the Tuscaloosa ATC tower.
Today, we learn the basics of aircraft inlet design.
This November, I was asked to provide a substitute lecture to a senior level propulsion class (AEM 408). For this lecture, I attempted to provide the basics of inlet design by discussing the relevant physics and constraints.
Inlet fan face total pressure was introduced as a way to quantify the performance of an inlet and to diagnose common issues.
The concept of boundary layer growth with the inlet’s adverse pressure gradient was reinforced from an earlier Aerodynamics I course.
The lecture notes are available here: https://charles-oneill.com/docs/InletTalkAEM408.pdf
Thanks and best wishes to the UA Aero 2018 Seniors.
On 27 Sept 2017, I gave a servo lecture to the UA senior design teams.
The lecture notes are at: ServoTalk
Recently, someone asked a good question.
How can I find the aerodynamic properties of an airfoil?
Here’s my quick suggestion:
Simple low-fidelity incompressible (camber line only, but works amazingly well):
- Thin airfoil theory (Anderson, Fundamentals of Aerodynamics, Chapter 4)
- Lesson 13 at https://charles-oneill.com/aem313/
Medium low fidelity incompressible (camber and thickness)
- Panel methods (Katz & Plotkin book is best…)
- Lesson 12 at https://charles-oneill.com/aem614/
Numerical incompressible with boundary layers
- XFOIL software (free MIT software. My students have coupled it with other solvers. Lesson 12 at https://charles-oneill.com/aem313/)
- CFD (don’t unless you need a compressible viscous solution)
- Flight Stability and Automatic Control, R. Nelson, McGraw-Hill, 2nd ed, 1998.
- Aircraft Performance and Design, John Anderson, McGraw-Hill, 1999.
By the end of the course, students should be able to:
- Understand basic aircraft performance and stability and control (S&C) terminology
- Estimate aircraft performance in steady and accelerated flight mission phases
- Size S&C surfaces of an aircraft
- Demonstrate a physical and mathematical understanding of aircraft flight modes
We will cover S&C and performance topics in the textbooks. Selected topics and sources supplement the text.
- Aircraft Nomenclature, Atmosphere, Instruments
- Static stability and control (FSAC, Chap 1)
- Aircraft equations of motion (FSAC, Chap 2)
- Longitudinal motion (FSAC, Chap 3)
- Lateral motion (FSAC, Chap 4)
- Steady Flight (APD, Chap 5)
- Accelerated Flight (APD, Chap 6)
- Aircraft Performance and Control Projects
In the Fall of 2016, I taught AEM 313 Aerodynamics I.
Objectives: Introduction to subsonic aerodynamics, including properties of the atmosphere; aerodynamic characteristics of airfoils, wings, and other components; lift and drag phenomena; and topics of current interest.
Required Book: Fundamentals of Aerodynamics, John Anderson, McGraw-Hill, 5th ed, 2010
We will cover subsonic and transonic topics in the textbook. Selected topics and sources supplement the text.
- Conservation Equations
- Similarity Parameters
- Flow Kinematics
- Euler and Bernoulli Equation
- Velocity Potential and Stream Function
- Elementary Potential Flows
- Laminar and Turbulent Boundary Layers
- Airfoil and Wing Geometry
- Thin Airfoil Theory
- Lifting Line Theory (Example: Lesson16-PrandtlLiftingLine)
- Lift, Drag and Pitching Moment
- Low-Re and High-Alpha Effects
- Subsonic Compressible Flow
- Transonic and Supercritical Airfoils
- Aircraft Aerodynamic Design Project (MemoAEM313Project)
Student Evaluations (Fall 2016): 16C Charles O’Neill (AEM 313-001 Aerodynamics)