ADTO # 72 - July 29, 1999
Tuesday, August 17, 12:00 p.m. Pacific Daylight Time: Phillip Luan, mechanical 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. Register for this chat at http://quest.arc.nasa.gov/aero/chats/#chatting Read Phillip's profile and field journals prior to joining this chat. http://quest.arc.nasa.gov/aero/wright/team/luan.html
Follow a Wind Tunnel Test of the Airliner of the Future Meet the people from NASA who have been planning and working this test. Read their compelling field journals as they surmount problems and the test progresses. Learn more about High Speed Research. The model is in the tunnel, and air is about to start blowing.Make a bookmark at http://quest.arc.nasa.gov/aero/events/hsct.html - - - - - - - Summer Air Travel Contest This a special summer contest for Aerospace Team Online. This contest is open to all students between the grades of fourth through twelfth. The grade categories are as follows: 4th through 8th 9th through 12th For this contest, we ask students to help researchers here at NASA solve the air travel traffic problems. For more information go to http://quest.arc.nasa.gov/aero/events/contest - - - - - - - COUNTDOWN TO FLIGHT REPUBLISHED For teachers using the Wright Flyer Lesson Plans,Countdown to Flight in its expanded form will be available on or about September 1, and orders can be logged in advance. The best way to order is direct from the publishers, toExcel (spelled thusly). Their toll-free order number is 877-823-9235, The ordering department at toExcel is open 8:30-5:00 PST and outside of the US, the phone number is 408-260-3056. They'll take orders starting now and the books will be shipped as soon as they come off the press. After the middle of August, the book will be entered into the system of the major book distributor, Ingram. After that time, books can be ordered through any bookstore, which will get them from Ingram. Apparently, some school districts have direct accounts with Ingram, so they'll be able to skip the bookstore part, but Ingram doesn't deal directly with individual teachers. Either way, teachers can plan on having the book for the fall semester and thereafter, so they can make good use of the NASA study guide and start building a lesson plan now.
[Editor's Note: Mina Cappuccio is the NASA Ames research engineer on the low speed test of the High Speed Civil Transport Technology Concept Airplane model. Read her biography at http://quest.arc.nasa.gov/aero/team/cappuccio.html ]
PREPARING TO COLLECT DATA
By Mina Cappuccio
July 21, 1999 As the head researcher on the project, I choose the measurements that that will be taken during the test. So six weeks ago I submitted to the Test Manager, Jules Gustie, the data requirements and he has assigned the mechanics and engineers to accomplish this work. The model is just about to come out of the prep room. While it was in the prep room the balance was installed on the model and checkloaded. The model was assembled and the model was plumbed to the Electronic Scanned Pressures (ESP). During this test we will be measuring the air pressure on the surface of the model at over 300 locations on the wings. On one side of the plane the pressures are being measured on the top of the wing and on the other side of the plane we are measuring the pressures underneath the wing. At each of the locations where pressure is measured there is pinprick-sized hole which is attached to a tiny stainless steel tube which is attached to the ESP modules. There are five modules, each with 64 transducers, in the model. The ESP system takes the air pressure measurement as a voltage. The voltage is sent to the data acquisition system and converted to an air pressure measurement. Some of the data I have asked for is visual data, both video and digital still images. To collect this data we have painted the model. We do this before putting the model in the tunnel so we don't spill any paint in the tunnel. The data acquisition system has been customized for this test. This means that the constants for this particular model have been put into the computer program. Calibration constants for converting analog and digital signals have also been put in the program. These signals come from instruments like the balance, ESP modules, and motors that drive parts remotely like the canard. Today the model will be moved from the model prep room to the tunnel. This week will be spent making sure all the instruments are connected to the data acquisition system and are working properly. The model will also be put in its final configuration for when we are ready to run.
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