[ Oran/NASAChatHost - 1
- 09:29:19 ]
Hello to our early arriving chat participants! Today's Aerospace Team Online
Chat with Mary Reveley from NASA Glenn Research Center will begin at 10:00
a.m. Pacific Daylight Time. Be sure you have read Mary's profile at http://quest.arc.nasa.gov/aero/team/reveley.html
to prepare your questions.
[ Oran/NASAChatHost - 2 - 09:29:35
Once the chat begins, Mary will attempt to answer as many of your questions
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[ Oran/NASAChatHost - 3 - 09:29:54
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[ Oran/NASAChatHost - 4 - 09:30:09
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[ Oran/NASAChatHost - 7 - 09:58:49
Hello and welcome to today's Aerospace Team Online chat with Mary Reveley
from NASA Glenn Research Center! Mary works in the Propulsion Systems
Analysis Office (PSAO), which is a systems analysis group. The group uses
different methods to try to predict how aircraft and engine designs will
perform. Mary is also responsible for determining the cost of manufacturing
new propulsion and aviation technologies, as well as how they will affect
[ Oran/NASAChatHost - 8 - 09:59:10
And now, here is Mary Reveley to answer your questions.
[ MaryReveley/GRC - 13 - 10:04:30
RE: [JenAlexa/internalDrive] As a working
Mom, what sort of activities do you enjoy doing the most with your girls
when you are not working?
things I like doing with my girls: going to the park, bike riding, playing
games, going to places like museums. All the things that parents like
doing with their kids.
[ MaryReveley/GRC - 14 - 10:06:45
RE: [Lara] Does your work involve mostly
private business aircraft (like aircraft design companies) or public aircraft
The group I work in deals mostly with commercial aircraft like ones used
by the airlines. Also we look at new concepts such as the high speed aircraft
that could be used to fly long distances in a short time. Current aircraft
like this would be like the Concord or SST.
[ MaryReveley/GRC - 15 - 10:09:15
RE: [JenAlexa/internalDrive] As a female,
did you find it at all difficult to break into the world of math and science?
I don't think it was difficult to be in the world of math and science
depending on what area is being studied. There are quite a few women doctors,
biologists, etc. Where it has gotten tough is when you narrow it down
to engineering which is a male-dominated field. I graduated with my bachelor's
degree in engineering in 1984 and things have improved over the last 15
[ MaryReveley/GRC - 19 - 10:13:30
RE: [JenAlexa/internalDrive] Do you
feel that women approach Math and Science differently? Consequently, do
you feel that we need more women in Science and Technology?
I believe that women and men have brains that are "wired" differently
and yes probably do look at math and science with a different perspective.
I believe that having a diversity of ways of looking at problems can offer
many new and sometimes better solutions. It seems to me that the way math
and science is taught (at least when I have taken classes) has been more
from the male perspective and in a way that makes it easier for boys/men
to learn. Everyone has different ways of learning: some are better visual
learners, some are better verbal learners, and so on. Yes, we need more
women in science and technology!
[ MaryReveley/GRC - 22 - 10:16:23
I've been reading about recent NASA cutbacks in the aeronautics division
to fund the International Space Station. Has this affected you at all?
yes, the cutbacks have affected us. Our high speed research program and
advance subsonic research programs will be cancelled as of the end of
September. The total amount of funding has been cut. This seems to have
happened quite a bit over the last few years. I'm all for space-related
research, but not at the expense of aeronautics research. Our country
currently preeminence in the aeronautics area due to research done by
NASA. That is in jeopardy if these funding cuts continue. Its all very
[ MaryReveley/GRC - 23 - 10:17:37
Are you involved in the orbiter project?
which orbitor are you referring to - the international space station?
I'm currently not involved in any space-related research. Everything I
do is related to aircraft that fly within the Earth's atmosphere.
[ MaryReveley/GRC - 26 - 10:19:28
What is SST?
SST stands for supersonic transport- an aircraft that flies faster that
Mach 1 (or faster than the speed of sound) The aircraft that are flow
by the airlines are all flow at subsonic speeds (less than Mach 1 or less
than the speed of sound)
[ Oran/NASAChatHost - 28 - 10:21:26
RE: [Ariel/WYESRPANAMA] Thanks Oran!
WYESR kids are on classes now. Don't worry! =) But they want to be here!
I'm sure of that!
No problem, Ariel. We were certainly happy to be able to reach so many
of the students in Central America with our international event. By the
way, an archive of the forum is available at http://quest.arc.nasa.gov/space/chats/archive.
Check it out!
[ MaryReveley/GRC - 30 - 10:23:52
RE: [ArielPerez/WYESRPanama] Hello Oran!
Hello Mary Revely, nice to meeting you! What fuel has probe to be the
most complete in terms of performance? more flying time for less fuel?
Are there any project to find new fuels?
Hello it's nice to chat with you too! My group doesn't specifically study
new fuels and fuel properties. We look at new ways to design the airframe
(different shaped wings, tails, etc. ) and also look at different ways
to design engines. We take much of the ideas of researchers and analyze
them to tell them how all their new technologies will affect the performance
and cost of the aircraft. A small change in one part of a plane or engine
which seems like a good improvement may possible cause some other part
of the plane to change which might be bad. The entire aircraft has to
be looked at as a system.
[ MaryReveley/GRC - 34 - 10:24:40
RE: [Ariel/WYESRPANAMA] I saw a video
where a designer use a computer to design a plane and then a machine makes
a replica in a plastic material like acrilic... What's the name of this
I'm not sure what that design tooled is called. Probably some kind of
"rapid prototyping" tool.
[ MaryReveley/GRC - 35 - 10:25:50
RE: [Bailey/PineGrove] How long have
you been doing your NASA job?
I'm glad to be getting so many good questions! I have worked here at NASA
for 9 years. I've been in my current job of propulsion analysis for only
[ MaryReveley/GRC - 38 - 10:28:00
RE: [josh/PineGrove] why aren't you
a pilot yet?
Josh, good question. I guess I have to make that a priority. When I was
in college it was because I didn't have the money needed to get my pilot's
license. Recently it has been because I have two small children who take
up a lot of my time. I'm glad you asked this question- on need to get
moving on that. Sometimes people forget what the important things are
because they get to busy doing other things.
[ Oran/NASAChatHost - 40 - 10:29:13
RE: [Ariel/WYESRPANAMA] yes, we have
visited already. I invite you to our web page. http://campus.fortunecity.com/depaul/30
is under construction but we will be posting many cool links!
Ariel, that's great. I will certainly visit your web page as well!
[ MaryReveley/GRC - 41 - 10:30:36
RE: [Christina/PineGrove] How do you
Christina- I use air to breathe! :-) Sorry- couldn't resist. Engines in
airplanes use air to burn the fuel. Just like if you lit a candle and
put a jar over the flame. In a very short time the candle will go out
because the burning of the wick of the candle needs the oxygen in air
to burn. So do the fuels used by jet engines. That is why the space shuttle
doesn't use jet engines. rockets use fuel that doesn't need air to burn.
The oxygen is built right into the fuel.
[ MaryReveley/GRC - 43 - 10:32:02
RE: [Ryan/PineGrove] Where does your
piping you design fit into the engine?
I don't design piping anymore. That was the job I was doing before I came
to my new job. Engines do have piping of sorts though that deliver the
fuel to the combuster. The combuster in the engine is where the fuel is
burned to make the energy needed to make the engine go.
[ Oran/NASAChatHost - 46 - 10:34:35
Everyone, don't forget to let us know how we're doing with our chats these
days. After today's chat, be sure to share your thoughts with us at http://quest.arc.nasa.gov/qchats.
[ MaryReveley/GRC - 47 - 10:35:46
RE: [Ariel/WYESRPANAMA] What are the
major problems you find in designing a new plane? How do wind tunnel helps
you to correct those problems?
Designing a new plane is the work of many people. You have the aerodynamics
to consider to make sure the plane has the proper "lift and drag" properties.
I has to have a strong enough structure to withstand all the forces brought
on by flight, it has to have good "control" properties so that it can
be controlled when flying and it needs a means of propulsion (engines)
to move it through the air. All of these need to work together. Using
a wind tunnel to test the aerodynamic performance of the airplane helps
greatly. It's not always possible to predict with a computer how an aircraft
will perform. Wind tunnels have also been used to test cars, trucks, windmills,
etc. Wind tunnels are very useful
[ MaryReveley/GRC - 48 - 10:37:50
RE: [Ariel/WYESRPANAMA] how do you simulate
the low oxigen level in high atmosphere to test the engines?
There are special test facilities for the different kinds of engines.
Some are like vacuum chambers to simulate the upper atmosphere of the
earth. Some of the test facilities are quite large- big enough to test
full size rocket engines. They are pretty impressive to see because of
[ MaryReveley/GRC - 52 - 10:40:55
RE: [Ryan/PineGrove] Why did you choose
to design piping instead of a lot of other jobs you could have done?
Ryan- actually I didn't plan on designing piping systems when I was a
kid or even in college. I really wanted to work at NASA and the job that
was available was designing pipes. Sometimes you have to wait to get to
what you really want to do. Also I have had the opportunity to work on
some exciting project while I was designing pipes. I worked on a solar
simulator which simulates the sun in testing of orbital vehicles. I have
also worked in support of jet engine testing and wind tunnel testing.
[ MaryReveley/GRC - 53 - 10:42:32
RE: [Ariel/WYESRPANAMA] Are you currently
using infrared light in the small wind tunnel to see the areas of the
plane more susceptible to the wind force? If so, how that tool improve
I'm not actively involved in the operation/testing of the wind tunnels.
I do know that lasers are used for visualization of the flow. I would
assume that the lasers would verify or discredit calculations of the flow
[ MaryReveley/GRC - 54 - 10:43:39
RE: [Ryan/PineGrove] Do you like being
an enginneer or do you just kind of like it?
Ryan, yes I like being and engineer, especially here at NASA because there
are so many neat things to see. Engineering involves problem solving which
[ MaryReveley/GRC - 55 - 10:46:50
RE: [josh/PineGrove] how long does it
take to design piping?
Josh, how long it takes to design piping depends on what the piping needs
to do. I have been on some jobs that lasted two years. This is because
it take a while for everyone to decide what they want the piping to do
sometimes. I have designed piping for water used to cool hot things (such
as the solar simulator). I have designed piping to move very hot air (1200
degree Fahrenheit) and very cold air (-60 degrees Fahrenheit) and I have
designed piping to carry oil for lubricating a helicopter gear box. Some
of the piping systems have pipes that are very big (4 feet in diameter)
or very small (1/8" tubing)
[ MaryReveley/GRC - 59 - 10:49:04
RE: [Lara/PineGrove] What kinds of metals
are used in supersonic aircraft engine design? I know they have to be
able to withstand high temperatures.
Lara- usually various kinds of steel or nickel. Often times in the combuster
where it gets very hot, ceramic liners are used. The temperature that
existing materials can take are one of the limiting factors for the design
of engines. If we had a material that could withstand 2000 F, then we
could have an engine that performed much better.
[ MaryReveley/GRC - 60 - 10:50:51
RE: [Bailey/PineGrove] How long does
it take from start to finish to design a airplane?
Bailey- It depends on how different the plane is from existing designs.
It can take a long time for new concepts- say like a new kind of jet fighter
for the air force. Often times the aircraft that you see in use now were
actually designed up to 25 years ago. It takes a long time for a "really
new" aircraft to go from design to use
[ MaryReveley/GRC - 64 - 10:52:26
RE: [Ariel/WYESRPANAMA] How many thrust
power generates a standard yet engine?
There are all different sizes of engines. Some are very small and have
2000 pounds of thrust, some are very large and can have up to 100,000
pounds of thrust. The standard engine in 300 passenger commercial airline
jet can have engines of up to 90,000 pounds thrust.
[ MaryReveley/GRC - 65 - 10:54:11
RE: [Ariel/WYESRPANAMA] If something
go wrong during a test, do you have an override system? Is it possible
to stop a jet engine sudenly once started?
Good question! We are very serious about safety here. All test operations
have many backups for all possible failures that might possibly occur
during testing. Some systems are automatic and will shut down the test
(engine) if certain things go wrong. Yes the engine can be stopped during
testing if something goes wrong.
[ MaryReveley/GRC - 66 - 10:54:35
RE: [josh/PineGrove] how long did you
Josh, I designed piping for about 7 1/2 years.
[ MaryReveley/GRC - 70 - 10:56:35
RE: [Ryan/PineGrove] How long have you
been doing your new job and what do you do when your at work?
Ryan - I have been at my new job for 1 year. I have been spending time
learning some software analysis programs that help me to figure out the
costs involved with changing the jet engines and also how that would change
the costs of the making and using the entire aircraft. I have also been
meeting with others on projects involved in estimating costs of new technologies
[ MaryReveley/GRC - 71 - 10:57:11
RE: [Ryan/PineGrove] Are you still working
with liquids or are you working with something else in your new job?
Ryan- I'm working with jet engines now, so the "liquid" that I work with
[ MaryReveley/GRC - 72 - 10:57:49
Do you work on Brazillian twin engine planes?
Christina- nope. We look at what the U.S. would be using
[ Oran/NASAChatHost - 75 - 10:59:42
We have just a few more minutes left with Mary Reveley today. As she answers
the final questions, we again invite you to share your thoughts with us
[ MaryReveley/GRC - 77 - 11:00:32
RE: [Ryan/PineGrove] How long does it
take to design and build the parts you need to on a jet or airplane?
Ryan- Design of the parts- well, probably depends on the part. I would
say anywhere from a few months to a couple of years.
[ MaryReveley/GRC - 78 - 11:01:27
RE: [josh/PineGrove] Do you design biplanes?
josh, no I don't design biplanes. Those were mostly used in the early
part of this century. I believe now that are used for air shows and for
[ MaryReveley/GRC - 80 - 11:02:13
RE: [Lara/PineGrove] Mary, thank you
for taking the time to do this chat. My fourth grade students have had
fun asking questions and reading answers from you. So have I!
Lara- you're welcome! They have a lot of good questions. They show a lot
of imagination! Keep up the good work everyone!
[ MaryReveley/GRC - 81 - 11:02:42
RE: [Ariel/WYESRPANAMA] What is the
injection system of a jet engine? continue flow or demand flow? or a combination
I'm not very knowledgeable about fuel injection systems for jet engines.
[ Oran/NASAChatHost - 82 - 11:03:42
We will now be ending our chat with Mary Reveley. We would like to thank
everyone for joining us today. Our special thanks to Mary for sharing
her career experience and expertise with us.
[ MaryReveley/GRC - 83 - 11:03:51
RE: [Ariel/WYESRPANAMA] Thanks you for
takinn time to answer my questions. I will share it with WYESR Kids. Greetings
You are welcome! Greetings from Ohio, USA. It's been exciting being able
to chat with you Mary
[ Oran/NASAChatHost - 84 - 11:03:58
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[ Oran/NASAChatHost - 86 - 11:04:56
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[ Oran/NASAChatHost - 88 - 11:06:41
RE: [Ariel/WYESRPANAMA] see you Oran
in the next chat! I will share this with my kids! Let's keep in touch!
Ariel, absolutely! So long for now!