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UPDATE #59 - April 9, 1999

PART 1: Upcoming Chat
PART 2: Project News
PART 3: The AIAA 1903 Wright Flyer Wind Tunnel Test Is Complete
PART 4: Subscribing & Unsubscribing: How to do it


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.

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.

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.

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.



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.

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


- - - - - - -

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 slee@mail.arc.nasa.gov

- - - - - - -
Right Flying Colaborative Projects

Several classes have shared their glider flight test results which are
Online at

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 ]


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

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

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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