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- Dec 17, 2009
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Attention Tripoli Members!
The schedule for the Tripoli TRATECH Technical Conference and Summit 2021 that is being held during LDRS-39 in Wendover, UT has been established, and we have 12 outstanding presentations that will be made available to the membership on July 29th and 30th in the evenings during LDRS, at the LDRS host hotel. The conference will be conducted in the banquet room which will be divided in half for the presentations.
This year, the event is strictly "BETA", Tripoli will be recording the presentations and will "attempt" to broadcast them live. In-person attendance will be "first come, first served" but we fully expect enough room for everyone that plans to attend.
The schedule below is subject to change.
Here are the details on the presentations and the presenters:
Thursday 7/29, 6:30PM
Dr. Terry McCreary
“BASIC PROPELLANT FORMULATION AND PROCESSING”
Synopsis: This PowerPoint presentation is designed for those who are thinking of making APCP motors but have little or no background or knowledge of practical aspects. The discussion will focus on R45 and R20 binder systems. Topics to be covered include: aspects of safety; common ingredients (binder, curatives, oxidizers, auxiliary fuels, bonding agents, plasticizers, etc.) and their properties and uses; motor/propellant ballistic properties; aspects of basic processing; cleanup; record-keeping.
Bio: Dr. Terry McCreary is Professor Emeritus at Murray State University, having earned his B.S. (St. Francis University, PA), M.S. (University of Georgia), and Ph.D. (Virginia Tech) in chemistry. He taught chemistry and a few other subjects in higher education for over 40 years. He is the author of Experimental Composite Propellant, a monograph on making and testing APCP. He is also co-author of General Chemistry (4th ed) and of four editions of Chemistry for Changing Times (11th-15th ed.). Terry started in model rocketry in 1965, moving on to other pursuits after 1973. Like most of today's rocketeers he became a BAR and joined TRA in 1994. He was elected to the Tripoli BoD in 2003, serving for eleven years as a director and president of the organization for two years. He is certified L3 but is too cheap to fly big motors, at least not often. He is the winner of the "Most 4-inch Patriot Rockets Lost or Destroyed" award.
Thursday 7/29, 6:30PM
“THE SPACEPORT AMERICA CUP”
Synopsis: History and future of the world's largest University rocketry competition.
Bio: Andy lives in Houston Texas and is Level 3 certified member of TRA and NAR. He is an avid research motor mixer and has attended BALLS, LDRS and AIRFest for many years. He is a past Prefect of Tripoli Houston and is presently the Launch Director for the Spaceport America Cup. He is also the Vice President of the Experimental Sounding Rocket Association and Senior Technical Advisor for the Base11 $1M Space Challenge.
Thursday 7/29, 7:30PM
“UNDERSTANDING THE ENERGY REQUIREMENTS FOR ORBITAL INSERTION PART 1”
Synopsis: This two-session presentation will explore the energy requirements for inserting a payload into orbit. The first session will begin with a discussion of the tyranny of the Tsiolkovsky rocket equation of motion which relates the change in velocity, 𝚫𝒗, to the specific impulse of the propellant and the natural log of the ratio of the initial and final weight of the rocket. Using this equation, we will explore and reject the premise of designing a Single Stage to Orbit (SSTO) vehicle, discuss the benefits of staging, and explore the questions of how to determine the number of stages and the relative stage sizes for a specific vehicle design. The presentation will then provide a brief tutorial on orbits and how to determine the 𝚫𝒗 required to insert a payload into a specific orbit and how to determine the 𝚫𝒗 contribution provided by the launch site location. This contribution is a function of the latitude of the launch site and the inclination of the desired orbit.
Bio: Dr. H. Pat Artis is a Professor of Practice in the Kevin T. Crofton Department of Aerospace and Ocean Engineering at Virginia Tech. He holds degrees or certificates in Engineering Mechanics, Computer Sciences, Systems Engineering, and Flight Test Engineering. He started his engineering career in 1972 at Bell Laboratories, entered the startup ecosystem at Mornio Associates in the 1980s, and then founded and directed his own engineering company for more than thirty years before returning to Virginia Tech to teach aerospace engineering.
Within the department, Dr. Artis is the lead instructor for the sophomore Introduction to Aerospace Engineering and Aircraft Performance course, is co-instructor for two semester capstone aircraft senior design course series, and has authored and presents elective courses in Avionics Systems and Booster Design, Fabrication, and Operation. In addition to his teaching activities, he advises Virginia Tech’s NASA SLI, [email protected], and Orbital Launch Vehicle Team. Wherever possible, he incorporates a rocket design, build, and fly project in his courses.
Dr. Artis has been building and flying rockets since 1958. He has been a member of NAR for more than six decades, has been a member of Tripoli for two decades, is a TAP member, and continues to be an active flier.
Thursday 7/29, 7:30PM
“WORKING WITH AND MENTORING UNIVERSITY STUDENT ROCKET TEAMS”
Synopsis: A "tips and lessons learned" review of how to engage, guide, manage and support a University rocketry team. Includes overview of rocketry competitions, finances, EH&S concerns, legal and other potential challenges.
Thursday 7/29, 8:30PM
“UNDERSTANDING THE ENERGY REQUIREMENTS FOR ORBITAL INSERTION PART 2”
Synopsis: The second session will start by returning to Tsiolkovsky rocket equation to observe that it does not account for gravitational, aerodynamic drag, or other 𝚫𝒗 losses. The second session will focus on how to make first order estimates of 𝚫𝒗 losses resulting from gravity, aerodynamic drag, propulsive efficiency, and steering. Having focused on 𝚫𝒗, we will conclude with a discussion of how to determine the launch vehicle velocity vector required to achieve a desired orbit.
Thursday 7/29, 8:30PM
Cameron McCoy & Kevin Spiegelman
“PURDUE SPACE PROGRAM 6-DEGREES OF FREEDOM SIMULATION”
Synopsis: We will be presenting about the 6 degrees of freedom (6DOF) simulation used by the Purdue Space Program rocket team at Purdue University in Indiana. The PSP Liquid rocket team is planning to launch a liquid methane/liquid oxygen rocket to 40,000 feet in the fall to compete in the FAR-MARS competition. Our 6DOF is a MATLAB/Simulink program that we use to predict the trajectory of our rocket given vehicle and launch parameters. Our presentation will cover what a 6DOF is, how it works, how we use it, and its limitations. We will begin with a brief history of the various simulation methods used on our team over .me and how we came to develop and use our current 6DOF model. We will go over how the 6DOF differs from other simulation tools including a direct comparison with common hobby rocketry tools such as OpenRocket and RASAero. We will go over the high-level structure of the model and how Digital DATCOM is used for aerodynamic modeling. We will then talk about how single variable analysis and Monte Carlo methods are used in conjunction with the 6DOF. We use these methods to analyze how changing different design parameters effects the predicted performance and trajectory of the rocket. Lastly, we will talk about the limitations of our 6DOF and the assumptions that we make when using it. We will continue to take questions and if time remains we will share some “bloopers” from the 6DOF when it has produced funny trajectories while we are modifying the code.
Bio: The presenters will be members of the PSP Liquids Trajectory and Aerodynamics Team. The main presenters will be Cameron McCoy and Kevin Spiegelman. Cameron is a first-year student and Kevin is a second-year student, both are majoring in Aerospace Engineering. Starting in Fall 2021 Cameron will be taking over as the lead of the Trajectory and Aerodynamics team. This summer Kevin will be working on personal rocket projects and Cameron will working with Professor Monique McClain doing research on 3D printing energetic materials.