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uh_huh that's all
okay so good evening everyone yeah um how likely a lot in so many
that the have the commitment they they want first of all thank him
uh for the help you gave me a in order to operate a two properties presentation then in
one for sure to things again of the mm professors and the visor that are here
for as and uh i want to thank you for for assisting to our
project so well known does eating it i will told about the
the main channels that our team uh is facing in namely in to a um
in two teams that are are a dynamics and mechanical so the um the
the first the uh the first time judge on this i want to talk about is our unending for sure so most of
you may argue what what you are in the back you watch which kind of a challenge us are you facing off
uh then we which kind of this goes forces the you have if you
are at about one hundredth of the um atmospheric pressure at sea level
well for sure we don't have so much a direct uh
so the dress code huge uh a viscous forces
but uh we have another problem which uh comes from a property of that here
that you can experiences every day which is the compress it related so
the most of you probably have the place when i when you were a child or white with the
empty syringe trying to squeeze the air out of them syringe or maybe pumping the air um
well in our bicycle palm into the tier of the whites so what is going there is in if you did that
um yea you've certainly experiences some resistance off a year from
i'm from the east on that is pushing a or
that the this because that the piston eh um is pushing their and does not
allowed to the full to air to go uh around the piston and uh
if you think the high pulpits exactly these we are pushing a piston throw 'em of what you
but at one thousand two hundred kilometres per hour as it then this show so
the thing here here is that that we are we have a um
a modest transportation which is our paul which at the cross section which is really comparable to the side of that you
so what does in what's going there is that the here it's compress it uh so
much that the flow of the year will show car on the part and we'll
if you want we'll uh uh make arise some losses interval speech to our part in this is the
channel for moderate dynamic team so we don't maybe we don't need a really fast design for
uh the direct viscous behaviours corps forces but we need the fancy design
uh because it takes is um i geometric relation between the cross
section of the pardon the cross section of that you which is call can probably to meet if we stay about this limits
we will have a problem we've we will stay below this limits then we can um
we we will be fine but it's so it's also trade off between uh the side of the boat we can see
what we do are really large uh what real large tube in order to not have this kind of problem
but then or a large there would be a problem them of course is not
really attractive going to reform of them in term of a selling so
on the other side department has to um do hostile enough pretty enough people or uh or
to be enough comfortable to the people so eh it's it's a matter of trade off
uh this takes me to the next slide which is the calm
forte i'm not speaking about converting them of how nice is
that share where we are going to lay down during your trip but in speaking about their comfort in term of
even told vibrations or a expo or or like a acceleration experiences
that the our customer will use will affect um experience so
and just to give an idea if you took a your p. actual slide
um european shows lives uh eh um has the liftoff from the uh from ground at two hundred
two hundred sixteen the two hundred six hundred twenty six dear reader for our and that
the um this acceleration of course in about twenty five seconds so
to simplify or live uh the acceleration is about three meter per second square
and that even if some of you can feel uncomfortable in uh during this acceleration
we can't thing to apply the same of federation quite remote if you want
to reach one thousand two hundred kilometres per hour with the same acceleration
the time uh that we did ten that will i it would be about the two minutes
to to reply to the market to mark the metal is a question yes
from eugenia about tools on is about five minutes if you want
because the length uh that uh i probably cover with
this beating with acceleration it's twenty kilometres okay
in in two minutes if you think it to the matinee
but it's a japanese technology a basin superconducting technologies
that it goes that the six hundred kilometres per hour at the top speed
and it will cover the same amount of space let's say eighteen kilometres so you can face it um which
are the challenges in term of vibrations acceleration that eh
we have to we have to take care um
for sure let's say we accelerated we everyone it everybody's
fine we aim our ever eh yeah we
have the cruise speed which is uh one thousand the uh one thousand hundred kilometres per hour
then i fear of course because it can be so we have to go back to
the most save state of the part which is namely the state you want
but now we yeah we are at one thousand two hundred kilometres per hour
so if you think to it what training and to the day um
incredible kinetic energy that is bringing the strain uh um in in
in that case the conventional breakers for for for train we'll
we'll camp the rail and we hit up and we to transform the kinetic energy into heat one if you want
heating up of the breaks in the rails so we in that case
we have to uh well we're design really well uh the um
the brakes in order to which that would withstand a really huge temperature okay
but once you have designed we well the the breaks you have to remember that the bodies man wrote people so you
can't break too fast because you can't push and people five g.'s so it's a tradeoff also and this guy
the last part it's if you want
is that again we are in vacuum so uh um if you we like aeroplanes today so we say we took
an aeroplane at ten kilometres of fate because that's their normal uh eight of the um of privilege one
the pressured right there it's about one fourth of the pressure at sea level
so this means that if we have a leakage into our plane um
the um question unconsciousness they can of course between thirty seconds in one minutes that's
why the hostess tell you put the mask offer and brief hearing case of
so we have to think getting hyper open
we have a much worse problem because we have a one hundred of
them atmospheric pressure so the hypothesis ear uh mm problems can be
can be more and more of um we can affect more
our customers so um we have to think also
to um supply our customers with fresh ears in case
out of the cage and this actually is uh
the those are a as you can see there are really a lot of challenges
that of course among an incredible amount of uh uh feels incompetence is in
got going back to what the um italy embolden were saying get p. f. l.
it's an incredible place where to get or the the teams and the
to also if you want to mix up confidences and teams in
the engineering mechanical team drawl not only mechanical engineer there are
um uh there are several uh feels like monster engine years and they like
to go and the physicist and uh and it's even engineer so um
it's really i am really glad to be in this project and re
you really glad to the news to involve mean these because
just to let you know i'm there i'm there and i'm weekly there but might feel them background the superconductors
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
well what's going on in these in these uh these themes that uh again i want to things uh and uh
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
1 March 2018 · 6:08 p.m.
History of Swissmetro
Marcel Jufer, Professor
1 March 2018 · 6:17 p.m.
Mechanical Design Challenges
Nicolo' Riva
1 March 2018 · 6:45 p.m.
Energy Handling and Propulsion Challenges
Theophane Dimier
1 March 2018 · 6:54 p.m.
Questions from Public
1 March 2018 · 7:04 p.m.

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