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Aerospace Team ONLINE

UPDATE #18 - April 3, 1998

PART 1: Upcoming Chats
PART 2: Early Bird Prize Winners
PART 3: Spanish Chats
PART 4: After the test - Final Thoughts
PART 5: Subscribing & Unsubscribing: How to do it

[Editor's Note: Aerospace Team Online takes a spring break next week (no chat and no update) and returns the week of April 13th.]


Tuesday, April 14, 10:00 a.m.- 11:00 a.m. Pacific Time:
Dave Korsmeyer, Senior Project Scientist

Dave is a project manager who develops advanced information
technology and systems like near real time remote access
to wind tunnel data.

Registration information is at
Read his biography prior to joining this chat.

Tuesday, April 21, 10:30 a.m.- 11:30 a.m.Pacific Time:
David Picasso, Deputy Director of Aeronautics.

David knows about all of the Aeronautics programs going on at Ames
Research Center.

Registration information is at
Read his biography prior to joining this chat.

Thursday, April 30, 1:00 p.m.- 2:00 p.m. Pacific Time:
Estela Hernandez, Flight Simulation Engineer

Estela is a flight simulation engineer. She uses math
to build computer models that simulate flying airplanes.
This chat will be in English and Spanish.

Registration information is at
Read her biography prior to joining this chat.


As you know we are holding two contests: "Draw a Picture of an
Airplane" and "Write an Essay Describing the Airplane You
Would Like to Design",

The early bird prize winners, whose entries were received
prior to March 30,  are Samuel Wood and James Wood of Marietta, GA
and Rodrigo Gomez-Ruis, Reynaldo Hellmund, Jaun Andres Cisneros,
Grade 6, Colegio Integral El Avila, Caracas, Venezuela

Congratulations and good luck in the contest!!


During April and May the Quest Project will host a series of
Spanish/English web chats.  Questions asked in Spanish will
be answered in Spanish, and questions asked in English will
be answered in English. These chats will help both native
Spanish and English speakers practice their second language
skills while learning about great jobs and careers at NASA.

Please join us for the next bilingual Aerospace Team Online
chat with Estella Hernandez, Thursday, April 30, 1998 1:00 to
2:00 p.m. Pacific.  Also check out some of the other great
bilingual chats featuring scientists and engineers from other
Sharing NASA projects.

To see a complete list of these special chats, visit:

[Editor's Note: Fanny Zuniga is an Aerospace Engineer who recently headed a wind tunnel test in the 12' Pressure Wind Tunnel at Ames Research Center. She wrote several journals about the preparations and events for this test. See them online with pictures at http://quest.arc.nasa.gov/aero/events/test.html ]


by Fanny Zuniga

March 25, 1988

Looking back now on my Supersonic Transport wind tunnel
test, I have some final thoughts to share with you. I
want to describe what we did after the test to wrap things
up, what we learned, and why we ran this test.

We spent the first few weeks after the test checking over
all of the data that was stored on the computer. There are
a bunch of corrections we make to the data, and we go through
all the data to make sure the corrections were made properly.
An example of this is correcting the airplane aerodynamic
loads to remove the effect of the wind tunnel walls. Normally,
air flows freely around an object, such as an airplane.
In a wind tunnel, the walls block some of the flow that
tries to go around the model which gives a slightly different
effect than in free air. For this reason, we calculate the
effect of the walls and adjust the measured forces so that
they more accurately represent what would happen in free air.

Now that we've checked all the data, we post it on the
internet! We do this because there are researchers all
over the country studying the data from this model. Sorry,
you can't go look at this data because we don't want
our results available to the whole world. Our data is
sensitive and I cannot freely share our specific results
with you and the general public. We are only allowed to
share our data and knowledge with the other members of
our High-Speed Research program. The members include NASA
and several U.S. airplane and engine companies. This program
is necessary because developing an airplane like this is a
huge investment for any one company to undergo alone. The
program members have agreed to protect the data so our U.S.
companies will be given the competitive edge they need to
build this supersonic airliner. This will also help ensure the
U.S. aerospace industry remain competitive and prosperous
in the world market. This will in return help the U.S. create
jobs and boost our economy.

We will study this data to learn as much about this model as
possible and help us continue to improve our design and meet
our project goals. A lot of what we learned is already being
used in planning the next test with this model. One of the
things we've learned from this test are which flaps on the
wings give us the best performance at takeoff and landing
conditions. Flaps are real important because they have a real
impact on noise, fuel usage, and most importantly airplane
weight. We also learned the effectiveness of the control surfaces
(horizontal tail, rudder, and ailerons) to make sure this
kind of aircraft can be flown safely. Basically, we will
continue to test and study this airplane to convince
ourselves that we can build one that is safe, affordable, and
environmentally friendly. Hopefully, if we are successful in our
endeavors, affordable supersonic travel and cargo delivery
will be available early in the next century.

Finally, since we are users of the wind tunnel, we spent some
time giving feedback to the people that run the tunnel.
For example, we recommended some important changes and
additions to the data plotting program which would make
it more useful for future research staff. We also spent
some time telling the wind-tunnel managers what we thought
worked well and what we thought needed some improvement.
We are part of the process for improving wind tunnel tests
in the future. If you want to improve something, you have to
talk to the people that use it.

I hope you have enjoyed learning about my wind tunnel test.
As for me, I have already started getting ready for the next
As for me, I have already started getting ready for the next
test of this model. This model will be modified some now and
will be tested again at NASA-Langley in their 14x22 ft. wind
tunnel. We have to modify the model to keep up with the current
design of this airplane and also to refurbish any parts that
may be worn. There's never a dull moment when you're racing to
complete the design of the next supersonic airplane.


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