UPDATE #59 - April 9, 1999
QuestChats require pre-registration. Unless otherwise noted, registration is at: http://quest.arc.nasa.gov/aero/chats/#chatting Wednesday, April 14, 1999, 10 AM Pacific Daylight Time: Mark Kilkenny, program planning specialist Over the past 16 years, Mark has worked in administrative positions for NASA. His current work focuses on John Glenn Research Center's administrative and business operations. He is responsible for conducting strategic planning for the center. He also helps the center determine how well it is progressing towards its long-term goals and objectives. Read Mark Kilkenny's profile prior to joining this chat. http://quest.arc.nasa.gov/aero/team/kilkenny.html Tuesday, April 20, 1999, 9:30 AM Pacific Daylight Time: Rich Coppenbarger, aerospace engineer Rich develops hardware and software systems to help air traffic controllers manage aircraft as they fly throughout the nation's skies. One of the software programs he is developing is called the CTAS, which helps air traffic move smoothly and without delays. The CTAS is part of the Advanced Air Transportation Technology (AATT) program, which is designed to help our nation's air transportation system function better and more safely, even with more aircraft flying in our skies. Read Rich Coppenbarger's profile prior to joining this chat. http://quest.arc.nasa.gov/aero/team/coppenbarger.html Tuesday, April 27, 1999, 11 AM Pacific Daylight Time: Ray Oyung, research coordinator, Fatigue Countermeasures Program Ray is part of a team that works in the Fatigue Countermeasures Program. The team tries to find ways to reduce the effects of fatigue, sleep loss, and disruptions to the body's internal clock on flight crews during flight operations. Ray is also part of a research team. As a member of the research team, Ray collects data from experiments focusing on certain aspects of fatigue and how they affect us. Read Ray Oyung's profile prior to joining this chat. http://quest.arc.nasa.gov/aero/team/ray.html Wednesday, April 28, 1999, 11 AM Pacific Time: Phillip Luan, instrumentation engineer Balances used in wind tunnel tests tell engineers how the force of the wind affects the model. Phillip is responsible for making sure that balances used for these tests are extremely accurate. He also helps determine how electrical signals received during the tests are related to the accuracy of the balances. Read Phillip Luan's profile and learn more about the Balance Calibration Lab prior to joining this chat. http://quest.arc.nasa.gov/aero/wright/team/luan.html http://quest.arc.nasa.gov/aero/wright/tunnels/balcallab.html
Wright Flyer Replica Wind tunnel Data Posted with Lesson Plans! See five runs worth of data and use it with the lesson plans to gain an understanding of the data. http://quest.arc.nasa.gov/aero/wright/teachers/angles/data.html Wind Tunnel Data Lesson Plans Do you "Know all the Angles"? Learn about lift and drag! Grades 4-8 Why is it important to "Get the Wright Pitch"? and "Watch your Attitude"! Grades 6-8 Getting "Up, up and Away" - learn what the Wright Brothers learned. Grades 9-12 http://quest.arc.nasa.gov/aero/wright/teachers - - - - - - - Share your classes' experience with the Wright Flyer Data Win a NASA Party Pack, (posters and lithographs), by sending a note describing your experience teaching with the Wind Tunnel Data Lesson Plans. We'd like to know how we can improve. Send a one page description to email@example.com - - - - - - - Right Flying Colaborative Projects Several classes have shared their glider flight test results which are Online at http://quest.arc.nasa.gov/aero/events/collaborative/gliders/index.html Look for their final results soon!
[Editor's Note: Jack Cherne is the Wright Flyer Project Manager for the Los Angeles Section of the American Institute of Astronautics and Aeronautics. Read his profile at http://quest.arc.nasa.gov/aero/wright/team/cherne.html ]
THE AIAA 1903 WRIGHT FLYER WIND TUNNEL TEST IS COMPLETE
by Jack Cherne
April 9, 1999 The wind tunnel test of the 1903 Wright Flyer Replica in NASA Ames Research Center 40 by 80 wind tunnel was everything we expected. We were able to collect most of the data points we planned to collect. We learned some things about the airplane and about the wind tunnel. Currently we are reducing the data. This means we are looking at all the data points, refining them and choosing which points to plot. When this step is complete we hope to know more about the pitch and rolling moments of the airplane compared to the various displacements of the control surfaces. One of the things I was surprised to learn was that the fabric on the wings of the airplane billowed considerably at high angles of attack when the wind was underneath the wing. This, in effect, changed the shape of the airfoil. We don't know why yet, it could be that the fabric relaxed in the humid environment, but I'm sure the Wright brothers would have encountered humid weather at Kitty Hawk too. We will be looking for clues to explain more about this when we go through the data. I was also pleasantly surprised that the drive system, the chain drive, worked as well as it did. I had my fingers crossed about that, but it worked well and we didn't have any difficulty until the last run and then we noticed that there was some heating of one of the bearings, and we shut it down. We only lost one data point. We were disappointed that we couldn't achieve the full rpm of the props due to an electrical problem. John Latz, one of our members, has all the data and he is inputing it into his computer which has some data reduction software. From this we will plot the measurements taken during the test. One of the common plots which we will be doing is lift versus drag another plot will describe the pitching moment. Then we will compare this data with the data from two other scale model tests for which we have data plots. We were very happy with the support we got we got from NASA. We were pleased that so many people took a personal interest in the test and pitched in.
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