Having everyone lie down head to foot boarding the train would maximize speed and minimize supporting infrastructure. 12 March 2012. Tests conducted by London Underground — which spends £60m a year on cleaning — show that washing the tunnels has a big impact on the air quality at some platforms. Removed up to 1,000kg If the tube was circular, could air speed be pushed up to 500mph+ to offset any drag at the same speed?  Although not positively known, it is possible that the GWR broad gauge (7 ft 0 1⁄4 in (2.14 m)) was used. Travel information for all London Tube lines: maps, timetables and fares A break at a station for a meal would mean a stop of you and your aero-car. On return journeys, the fan was reversed to create a vacuum to suck the carriage backwards, whilst the carriage used its brakes to come to a stop. It's hard to say – although it seems extremely unlikely that a cash-strapped United States or European Union member would be willing to pony up and lead the way. Of course, if it was that simple, we'd already be blasting around the Earth at orbital speeds like they were predicting in the 1800s. The Metropolitan and District railways both used carriages exclusively until they electrified in the early 20th century. Reduced air resistance could permit vactrains to travel at very high (hypersonic) speeds with relatively little power—up to 6,400–8,000 km/h (4,000–5,000 mph). The thing about maintaining a total vacuum is that one hole in your structure compromises the vacuum almost immediately. The Met electric locos are another matter - whilst they were mostly intended to haul vacuum braked stock, the Westinghouse brake was a regular train brake - the two pipes at the front of the locos were one for vacuum and one for air - It would be interesting to find out more about the idea of each brake working the other. And keeping a vacuum in that volume? A brick tunnel, too small to be the running tunnel, and what is thought to be a retaining wall were found. A new Tunnel Cleaning Train for London UndergroundLondon Underground. It had previously been slated for introduction on the Underground network in late 2013 in order to combat metal dust levels. or are you too young to remember those issues.. Oh the pain of age...;-(. Engraving of the Crystal Palace line (1864), "Frederic Delaitre's Lost Subways / Crystal Palace Atmospheric Railway", "Making History – The Crystal Palace atmospheric railway", "IanVisits… » The Waterloo and Whitehall Pneumatic Railway", Greater London Industrial Archaeology Society, "Money Shortage Halts British 'pneumatic rwy' IA project", https://en.wikipedia.org/w/index.php?title=Crystal_Palace_pneumatic_railway&oldid=993932713, Creative Commons Attribution-ShareAlike License, This page was last edited on 13 December 2020, at 06:47. Tickets would be purchased online so stations would no longer be needed. Turns out there's a few serious roadblocks in the way. And even with this advantage, they still can't cruise much faster than 570 mph (917 km/h) without being horribly inefficient.  The carriage at the upper terminus was allowed to enter the tunnel under its own weight, when "a pair of iron doors, hinged like lock gates" was closed behind it. Airliners have to fly 40,000 feet up in the air to take advantage of the reduced drag you get when the air thins out a bit. The tunnel was built in a shallow trench of 4 feet (1.2 m) in depth; the contemporary illustration (right) showing the line disappearing beneath the landscape seems to be no more than artistic licence although, as built, earth may have been drawn up around the structure. In pneumatic systems, the chute connects to an underground pipe that leads directly to a neighborhood waste collection center. Here's the plan – for step one, Terraspan would like to build a backbone network of underground vacuum tube train tunnels linking eastern Canada to western Mexico through the United States. good luck to that.  A contemporary newspaper account called for steps to prevent any mechanical failure subjecting to passengers to effects of vacuum like "frogs under a vacuum pump".  The line operated from 27 August 1864 to October 1864. Central , Bakerloo , Circle , District , Metropolitan , Jubilee , Northern , Waterloo & City , Hammersmith & City , Piccadilly , Victoria along the DLR (Docklands Light Railway) while interconnecting with the local train … New trains are designed for maximum number of standing passengers and for speed of access to the cars and have regenerative braking and … Transport for London has dust on the tube is “highly unlikely” to be dangerous to health Another thought, and possibly daft - but if you can't maintain a vacuum, how about increasing the air speed in the tube? High speeds in tubes are best attained by very long trains of tiny frontal surface area vehicles not much larger than a single person. How can you hope to control a 4,000 mph airfoil within a tiny tube when the air pressure onset is sudden and unexpected? The kinds of tube tracks we're talking about here would have to stretch thousands of miles in order to reach their optimum level of benefit – that's thousands of miles of safety risks. And that's not to mention land acquisition – which could prove tough, as these machines move so fast that their turning radius is gigantic and route choices will be limited. Speed, for one. After all, we've all seen the wreckage that can be caused in a 60 mph (96 km/h) car crash. The Metropolitan and District railways both used carriages exclusively until they electrified in the early 20th century. The London Underground is a metro system serving a large part of Greater London and neighbouring areas of Essex, Hertfordshire and Buckinghamshire in the UK. The London underground tube provides 12 lines and spread over 400km throughout 270 Tube stations. A vactrain (or vacuum tube train) is a proposed design for very-high-speed rail transportation. “More than £6.5 million was spent by Transport for London (TfL) on its doomed tunnel-cleaning train project, it has been revealed. (Pocket-lint) - Elon Musk has started the building revolution for a new train system. A vehicle traveling 4,000 mph is going to eat up some serious distance in an emergency stop situation. See the stories that matter in your inbox every morning. Earlier this week, everyone was banging on about Virgin Hyperloop, the train in a tube that’ll supposedly be able to hit speeds of 1,000 kph (620 mph) when it’s finished. And it's not hard to dream up a dozen situations, whether natural disasters, man-made errors in judgement or acts of war or terrorism that could easily crack or break a structure like this. They will never get the construction costs back: twin 50m bore tunnels over 1000's of kilometres?  An arched brick tunnel 8 feet (2.4 m) high led from a below-ground chamber in the engine house to the side of the running tunnel. This is 5–6 times the speed of sound in Earth's atmosphere at sea level. The Tunnel Cleaning Train includes a carriage with large vacuum nozzles that clean the tube tunnel as the train passes through. In the 1800s, when pneumatic tubes shot telegrams and small items all around buildings and sometimes small cities, the future of mass transit seemed clear: we'd be firing people around through these sealed tubes at high speeds. We got interested in this after we laid a 1000-foot translucent pipe on a football field at MIT; we created a vacuum and shot tiny toy trains through it … The London Underground has also owned several departmental self-powered vehicles designed for other duties. Even if it was the perfect ride, @ 4000mph, what would that break neck momentum do to the human body? Terraspan's giant, 4,000 mph (6,437 km/h) vacuum tube train, which also doubles as a superconducting power line. It was also the first underground railway to operate electric trains. I would put my money on a normal-air-pressure solution, running along or above highways, electric powered, fully-automated, modular and regulated to allow for easy and flexible shuttle cargo and passenger traffic with thinner infrastructures and lighter vehicles. Of all the pneumatic railways, though, the LPDR is the oldest - it’s actually the second-oldest underground railroad in the world, opening only a year after the first Paddington-Farringdon line of the Underground - and the longest-lasting of them all. Yes we could do it, but why? Small diameter pipes are easier to design than large ones. 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