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uh_huh that's all
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okay so good evening everyone yeah um how likely a lot in so many
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that the have the commitment they they want first of all thank him
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uh for the help you gave me a in order to operate a two properties presentation then in
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one for sure to things again of the mm professors and the visor that are here
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for as and uh i want to thank you for for assisting to our
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project so well known does eating it i will told about the
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the main channels that our team uh is facing in namely in to a um
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in two teams that are are a dynamics and mechanical so the um the
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the first the uh the first time judge on this i want to talk about is our unending for sure so most of
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you may argue what what you are in the back you watch which kind of a challenge us are you facing off
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uh then we which kind of this goes forces the you have if you
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are at about one hundredth of the um atmospheric pressure at sea level
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well for sure we don't have so much a direct uh
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so the dress code huge uh a viscous forces
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but uh we have another problem which uh comes from a property of that here
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that you can experiences every day which is the compress it related so
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the most of you probably have the place when i when you were a child or white with the
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empty syringe trying to squeeze the air out of them syringe or maybe pumping the air um
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well in our bicycle palm into the tier of the whites so what is going there is in if you did that
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um yea you've certainly experiences some resistance off a year from
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i'm from the east on that is pushing a or
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that the this because that the piston eh um is pushing their and does not
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allowed to the full to air to go uh around the piston and uh
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if you think the high pulpits exactly these we are pushing a piston throw 'em of what you
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but at one thousand two hundred kilometres per hour as it then this show so
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the thing here here is that that we are we have a um
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a modest transportation which is our paul which at the cross section which is really comparable to the side of that you
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so what does in what's going there is that the here it's compress it uh so
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much that the flow of the year will show car on the part and we'll
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if you want we'll uh uh make arise some losses interval speech to our part in this is the
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channel for moderate dynamic team so we don't maybe we don't need a really fast design for
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uh the direct viscous behaviours corps forces but we need the fancy design
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uh because it takes is um i geometric relation between the cross
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section of the pardon the cross section of that you which is call can probably to meet if we stay about this limits
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we will have a problem we've we will stay below this limits then we can um
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we we will be fine but it's so it's also trade off between uh the side of the boat we can see
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what we do are really large uh what real large tube in order to not have this kind of problem
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but then or a large there would be a problem them of course is not
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really attractive going to reform of them in term of a selling so
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on the other side department has to um do hostile enough pretty enough people or uh or
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to be enough comfortable to the people so eh it's it's a matter of trade off
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uh this takes me to the next slide which is the calm
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forte i'm not speaking about converting them of how nice is
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that share where we are going to lay down during your trip but in speaking about their comfort in term of
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even told vibrations or a expo or or like a acceleration experiences
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that the our customer will use will affect um experience so
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and just to give an idea if you took a your p. actual slide
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um european shows lives uh eh um has the liftoff from the uh from ground at two hundred
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two hundred sixteen the two hundred six hundred twenty six dear reader for our and that
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the um this acceleration of course in about twenty five seconds so
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to simplify or live uh the acceleration is about three meter per second square
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and that even if some of you can feel uncomfortable in uh during this acceleration
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we can't thing to apply the same of federation quite remote if you want
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to reach one thousand two hundred kilometres per hour with the same acceleration
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the time uh that we did ten that will i it would be about the two minutes
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to to reply to the market to mark the metal is a question yes
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from eugenia about tools on is about five minutes if you want
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because the length uh that uh i probably cover with
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this beating with acceleration it's twenty kilometres okay
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in in two minutes if you think it to the matinee
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but it's a japanese technology a basin superconducting technologies
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that it goes that the six hundred kilometres per hour at the top speed
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and it will cover the same amount of space let's say eighteen kilometres so you can face it um which
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are the challenges in term of vibrations acceleration that eh
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we have to we have to take care um
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for sure let's say we accelerated we everyone it everybody's
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fine we aim our ever eh yeah we
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have the cruise speed which is uh one thousand the uh one thousand hundred kilometres per hour
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then i fear of course because it can be so we have to go back to
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the most save state of the part which is namely the state you want
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but now we yeah we are at one thousand two hundred kilometres per hour
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so if you think to it what training and to the day um
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incredible kinetic energy that is bringing the strain uh um in in
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in that case the conventional breakers for for for train we'll
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we'll camp the rail and we hit up and we to transform the kinetic energy into heat one if you want
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heating up of the breaks in the rails so we in that case
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we have to uh well we're design really well uh the um
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the brakes in order to which that would withstand a really huge temperature okay
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but once you have designed we well the the breaks you have to remember that the bodies man wrote people so you
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can't break too fast because you can't push and people five g.'s so it's a tradeoff also and this guy
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so
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the last part it's if you want
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is that again we are in vacuum so uh um if you we like aeroplanes today so we say we took
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an aeroplane at ten kilometres of fate because that's their normal uh eight of the um of privilege one
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the pressured right there it's about one fourth of the pressure at sea level
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so this means that if we have a leakage into our plane um
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the um question unconsciousness they can of course between thirty seconds in one minutes that's
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why the hostess tell you put the mask offer and brief hearing case of
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so we have to think getting hyper open
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we have a much worse problem because we have a one hundred of
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them atmospheric pressure so the hypothesis ear uh mm problems can be
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can be more and more of um we can affect more
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our customers so um we have to think also
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to um supply our customers with fresh ears in case
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out of the cage and this actually is uh
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the those are a as you can see there are really a lot of challenges
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that of course among an incredible amount of uh uh feels incompetence is in
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got going back to what the um italy embolden were saying get p. f. l.
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it's an incredible place where to get or the the teams and the
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to also if you want to mix up confidences and teams in
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the engineering mechanical team drawl not only mechanical engineer there are
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um uh there are several uh feels like monster engine years and they like
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to go and the physicist and uh and it's even engineer so um
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it's really i am really glad to be in this project and re
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you really glad to the news to involve mean these because
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just to let you know i'm there i'm there and i'm weekly there but might feel them background the superconductors
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and then the feces so it's really really far away from these but i i think it's a good eh it depicts frequent
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well what's going on in these in these uh these themes that uh again i want to things uh and uh
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and i think that the the now it's it's it's the time of uh my neck scully that we'll talk

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Conference Program

Opening Speech
Martin Vetterli, Professor
March 1, 2018 · 6:08 p.m.
5205 views
History of Swissmetro
Marcel Jufer, Professor
March 1, 2018 · 6:17 p.m.
1059 views
Introducing the EPFL Hyperloop project
Mario Paolone, Professor
March 1, 2018 · 6:28 p.m.
723 views
Mechanical Design Challenges
Nicolo' Riva
March 1, 2018 · 6:45 p.m.
289 views
Energy Handling and Propulsion Challenges
Theophane Dimier
March 1, 2018 · 6:54 p.m.
277 views
Questions from Public
Panel
March 1, 2018 · 7:04 p.m.
208 views

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