Vozovi bez granica

[bigvlada]

August 12, 2013HyperloopBy Elon Musk, Chairman, Product Architect & CEOTAGS: Engineering /0 commentsWhen the California “high speed” rail was approved, I was quite disappointed, as I know many others were too. How could it be that the home of Silicon Valley and JPL – doing incredible things like indexing all the world’s knowledge and putting rovers on Mars – would build a bullet train that is both one of the most expensive per mile and one of the slowest in the world? Note, I am hedging my statement slightly by saying “one of”. The head of the California high speed rail project called me to complain that it wasn’t the very slowest bullet train nor the very most expensive per mile.The underlying motive for a statewide mass transit system is a good one. It would be great to have an alternative to flying or driving, but obviously only if it is actually better than flying or driving. The train in question would be both slower, more expensive to operate (if unsubsidized) and less safe by two orders of magnitude than flying, so why would anyone use it?If we are to make a massive investment in a new transportation system, then the return should by rights be equally massive. Compared to the alternatives, it should ideally be:SaferFasterLower costMore convenientImmune to weatherSustainably self-poweringResistant to EarthquakesNot disruptive to those along the routeIs there truly a new mode of transport – a fifth mode after planes, trains, cars and boats – that meets those criteria and is practical to implement? Many ideas for a system with most of those properties have been proposed and should be acknowledged, reaching as far back as Robert Goddard’s to proposals in recent decades by the Rand Corporation and ET3.Unfortunately, none of these have panned out. As things stand today, there is not even a short distance demonstration system operating in test pilot mode anywhere in the world, let alone something that is robust enough for public transit. They all possess, it would seem, one or more fatal flaws that prevent them from coming to fruition.Constraining the ProblemThe Hyperloop (or something similar) is, in my opinion, the right solution for the specific case of high traffic city pairs that are less than about 1500 km or 900 miles apart. Around that inflection point, I suspect that supersonic air travel ends up being faster and cheaper. With a high enough altitude and the right geometry, the sonic boom noise on the ground would be no louder than current airliners, so that isn’t a showstopper. Also, a quiet supersonic plane immediately solves every long distance city pair without the need for a vast new worldwide infrastructure.However, for a sub several hundred mile journey, having a supersonic plane is rather pointless, as you would spend almost all your time slowly ascending and descending and very little time at cruise speed. In order to go fast, you need to be at high altitude where the air density drops exponentially, as air at sea level becomes as thick as molasses (not literally, but you get the picture) as you approach sonic velocity.Continue Reading, Hyperloop-Alpha.pdfhttp://www.teslamotors.com/blog/hyperloopNije baš kao mreža podzemnih tunela u vakuumu gde bi moglo i 20 maha, ali nije loše. Inače, ideja je dosta matora.http://en.wikipedia.org/wiki/Crystal_Palace_pneumatic_railway

[Tresko]

Uh, čekaj dok Ilić Mr Velimir vidi ovo.. Kako bi na tome moglo da se kraducka.

[ToniAdams]

brate...

[banecare1]

http://www.youtube.com/watch?v=lmcHARVFubk

[Аврам Гојић]

haha ima iskusna fora za putovanje vozom do Praga. kupis kartu Beograd-Kelebija, pa preko neta posebno karte kroz Madjarsku, Slovacku i Cesku, i put izadje skoro duplo jeftinije!

[borris_]

Postavljanje sina na brzoj liniji Paris Strasbourg

 

http://youtu.be/Sr3D8fJZ0Cg

[barrcode]

u sredu će biti odlučeno ko će General Electric ili Siemens preuzeti većinski paket Alstom-a  :( , samim tim i železnički deo (tgv).

[borris_]

Ne, nece zeljeznicki dio.

[hazard]

Razdvaja se Alstom na dve kompanije?

[Pontijak]

Postavljanje sina na brzoj liniji Paris Strasbourg

[hazard]

Postavljanje sina na brzoj liniji Paris Strasbourg

 

 

Zar na liniji Pariz - Strazburg već nije bila brza pruga? Koliko se sećam od Strazbura na istok je spora pruga, od Strazbura na zapad je voz tutnjao ihahaha...

[borris_]

Negdje do Metz-a je brza pruga, ovo je druga faza do Strasbourg-a. Kolega ide da nadgleda radove.

[borris_]

Razdvaja se Alstom na dve kompanije?

 Izgleda.

Prije dva mjeseca ljudi iz Alstoma su mi pricali da ce mozda prodati Alstom Transport. Ispostavilo se da prodaju Alstom Energie.

[barrcode]

 Izgleda.

Prije dva mjeseca ljudi iz Alstoma su mi pricali da ce mozda prodati Alstom Transport. Ispostavilo se da prodaju Alstom Energie.

prodaju i jedno i drugo.

[ajgor]

Štemuju se stari peroni punom parom:

 

Za sada smo spucali 50 miliona jerbo se neko zajebao kod specifikacije, a još nije gotovo