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Welcome everybody our guest today Mina Cappuccio is an expert in Propulsion
[ Mina/Ames - 3
- 11:59:17 ]
Hello Everyone. I am looking forward to talking to you all.
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RE: [Carl/homeschooled] Hi Susan!
- 5 - 12:02:02 ]
How will the engines sit on the HSCT?
[ Mina/Ames - 6
- 12:02:49 ]
RE: [Susan/NASAChatHost] Hi Carl!
Hi Susan, The engines sit under the wing just like any other commercial
jetliner. The only difference is they will sit closer to the wing.
[ Mina/Ames - 7
- 12:03:58 ]
Hi Carl, So far you are the only one on this chat. How old are you and
do you like to be home schooled?
[ Carl/homeschooled - 9 - 12:06:18 ]
I"m 17 and yes I like it.
[ Mina/Ames - 10
- 12:06:58 ]
RE: [Carl/homeschooled] What metal will they be using for
the main airframe of the HSCT?
The material that will be used for most of the airplane will be aluminum,
but there will be parts made of titanium to take the higher temperatures.
[ Mina/Ames - 12
- 12:09:00 ]
RE: [Carl/homeschooled] Will the engins be in external pods
like a 747 or will the wings be big enough to hold them?
The engines will be in external pods that are very closely tied to the
wing. The wing is too thin to actually hold the engines.
[ Mina/Ames - 13
- 12:10:28 ]
Carl, Have you ever seen pictures of the Concorde. The HSCT (High Speed
Civil Transport) will look very similar to it.
[ Mina/Ames - 17
- 12:11:52 ]
RE: [Joey-Joey/homeschool] On the plane you described in
you bio. How many engins will it have?
Hi Joey, The airplane will have 4 engines. 2 on each wing that are separate
and not attached to each other.
[ Mina/Ames - 18
- 12:12:34 ]
RE: [Carl/homeschooled] Is there going to be fuel in the
wings or will it be in a climate controled container some where els?
The fuel will be distributed in tanks in the wing. I am sure these tanks
will be climate controlled.
[ Mina/Ames - 20
- 12:14:21 ]
RE: [Susan/NASAChatHost] What
are you working on now Mina?
Susan, I am currently working on 2 projects for the HSCT. One is an upcoming
wind tunnel test that will take place in Virginia. I will be testing an
HSCT configuration that has been optimized to give lower drag on a computer.
The other project is going to produce a wind tunnel model where propulsion
induced effects can be measured.
[ Mina/Ames - 22
- 12:16:13 ]
RE: [Joey-Joey/homeschool] How fast will this airplane be
able to fly?
Joey, The HSCT will fly at 2.4 times the speed of sound or approximately
1632 miles per hour.
[ Mina/Ames - 24
- 12:18:31 ]
RE: [Carl/homeschooled] Do you know much about the engins?
like how manny pounds of thrust and weight? I"m building up to a bigger
The thrust the engines have to be able to put out is equivalent to the
maximum takeoff weight of the airplane. Right now the weight is around
[ Joey-Joey/homeschoo - 23 - 12:16:48 ]
How soon do you think it will be before it will be ready for commerical
[ Mina/Ames - 26
- 12:19:17 ]
We are hoping the airplane will be available for commercial use in the
[ Mina/Ames - 27
- 12:20:57 ]
RE: [Joey-Joey/homeschool] How will it compair to the Concord?
The wing airfoil shapes will be different than the Concorde as well as
the planform because of the Mach number it flys at. The engine will also
be better and not podded.
[ Mina/Ames - 30
- 12:22:30 ]
RE: [Susan/NASAChatHost] What
is the Planform?
The planform shape is the shape of the wing if you look down on it from
[ Mina/Ames - 32
- 12:23:53 ]
RE: [Carl/homeschooled] Wow if each engin is making around
200,000 pounds of thrust is it going to have to have thrust reversable
The engines will not have thrust reversers on them. The only need for
thrust reversers is to stop sooner on a runway. All airplanes have to
certified without thrust reversers.
[ Mina/Ames - 34
- 12:24:52 ]
RE: [Joey-Joey/homeschool] Personally, how fast have you
I have not been lucky enough to fly on a Concorde. My roommate has. She
said that the airplane makes you jerk back into your seat when it goes
faster than the speed of sound.
[ Mina/Ames - 38
- 12:29:25 ]
RE: [Joey-Joey/homeschool] What is the estimated cost of
I am not sure the exact amount. But I think it will cost over 100 million
[ Mina/Ames - 40
- 12:30:21 ]
RE: [Susan/NASAChatHost] How big
will this airplane be?
The airplane will be approximately 400 ft long and 120 ft wide.
[ Mina/Ames - 42
- 12:31:22 ]
RE: [Joey-Joey/homeschool] How much more runway will this
plane need compaired to the Concord?
This airplane will probably use around the same amount of runway as the
Concorde. The airports will have to be able to take this airplane without
any changes to their runways.
[ Mina/Ames - 43
- 12:32:30 ]
RE: [Carl/homeschooled] Have there been any magor shape changes
in the HSCT since the model was put into wind tunnels?
Not many changes. The model I will be putting in the tunnel was designed
last year. The designers are trying to make changes that will improve
the drag even more, but they are not done yet.
[ Mina/Ames - 46
- 12:33:56 ]
RE: [Susan/NASAChatHost] Mina,
do you share information with people who are looking a different aspects
of the HSCT?
We only share information within the HSR (High Speed Research) community.
This a proprietary project, so detailed information can only be shared
within the project.
[ Mina/Ames - 48
- 12:35:44 ]
RE: [Joey-Joey/homeschool] At the price you quoted what do
you think the price of a ticket will be?
The ticket is targeted to be no more than 20% over a current ticket. The
Concorde charges $2000 for a roundtrip between NY and Paris.
[ Mina/Ames - 49
- 12:37:24 ]
RE: [Joey-Joey/homeschool] About how many runways around
the wourld will take it?
The airplane is supposed to be certified to fly over land and water, so
that many runways across the globe can take it. The way this will be accomplished
is to reduce the sonic boom sound level and reduce engine noise and emmissions.
[ Mina/Ames - 52
- 12:39:32 ]
RE: [Susan/NASAChatHost] What
kind of propulsion induced effect do you have to look at in the HSCT
Propulsion induced effects that will be looked at are the amount of inlet
spillage and its effect on the drag of the airplane; nozzle thrust vectoring
and its effect on the stability and controls of the aircraft; etc.
[ Mina/Ames - 53
- 12:40:01 ]
RE: [Joey-Joey/homeschool] About how many people will it
This airplane plans to hold over 300 passengers.
[ Mina/Ames - 54
- 12:40:48 ]
RE: [Mina/Ames] Not much changes.
The model I will be putting in the tunnel was designed last year. The
designers are trying to make changes that will improve the drag even more,
but they are not done yet.
Carl, Where are you? You had a bigger question for me.
[ Mina/Ames - 57
- 12:42:41 ]
RE: [Carl/homeschooled] Will it be hard to replace an engin
or sevral magor parts or will this be like an F-22 that you can take out
the whole engin and put one in with 3 wrenches in 30 minutes?
The reliability and maintainability of this aircraft have to be as good
or better than commercial jetliners. The airlines will need to be able
to turn around the aircraft quickly for its next flights.
[ Mina/Ames - 59
- 12:43:52 ]
RE: [Susan/NASAChatHost] Have
you done CFD (Computational Fluid Dynamic) studies of the propulsion induced
Some CFD (Computational Fluid Dynamic) studies have begun to look at propulsion
induced effects. It is a difficult problem because of the added complexity
of chemistry in the problem. This is an issue that has not been mastered
in CFD (Computational Fluid Dynamic) yet.
[ Mina/Ames - 60
- 12:45:27 ]
RE: [Carl/homeschooled] Well I was thinking about the structural
design problems of 800,000 pounds of thrust forward or backward.
The structural aspects of the problem are a challenge. Many types of materials
are being looked at to take the loads. One of the materials being looked
at is graphite composites.
[ Mina/Ames - 62
- 12:48:01 ]
RE: [Susan/NASAChatHost] Why do
you have to go to Langley for your next test?
I have to go to Langley in Virginia for my next test because the wind
tunnels at Ames are being refurbished. The tunnels at Ames won't be coming
back up until 1999.
[ Mina/Ames - 66
- 12:50:26 ]
RE: [Susan/NASAChatHost] What
is inlet spillage and how does it cause drag?
Inlet spillage is when the engine is not taking in all the air coming
toward it. The air spills around the engine pod because of some physical
or flow phenomena. If the engine doesn't take in all the air it needs,
it could flame or stall out. The results of air spilling is more drag
for the airplane.
- 67 - 12:51:09 ]
RE: [Joey-Joey/homeschool] Mina thank you vary
much I enjoyed chatting with you. Susan, I think there was two different
times schedule for this chat.
Where did you see the different times, thank you
[ Mina/Ames - 68
- 12:52:13 ]
RE: [Carl/homeschooled] How do graphite composits hold up
to heat? I know thats one of the good points about titanium.
Graphite composites would make up the structure of the wing and will proably
need to be cooled so it doesn't fail under too much heat. Graphite composites
have properties that make it stronger and can withstand more heat than
[ Mina/Ames - 69
- 12:52:49 ]
RE: [Susan/NASAChatHost] Where
did you see the different times, thank you
Joey, Thank you for joining me on this chat. I enjoyed your questions.
- 72 - 12:59:16 ]
Thanks Mina and everyone! Great questions and great answers!
[ Mina/Ames - 73
- 13:00:16 ]
RE: [Susan/NASAChatHost] Thanks
Mina and everyone! Great questions and great answers!
Thanks for letting me participate in this chat. I enjoyed talking with
Carl and Joey.
[ Carl/homeschooled - 75 - 13:04:23 ]
Thanks for all the answers.