Evacuated Air Transport

[Phil]

No, this was live on air with ten minutes preparation time!

Those tubes for carrying cylinders containing paper are a whole different bucket of prunes, using differential air pressure to propel them. The transport system intends to use maglev trains and evacuated tunnels for essentially friction-and-turbulence-free motion. The volume to evacuate is going to be enormous to begin with - and it's hard to maintain a vacuum in a huge volume, unless space does it for you. Maybe they could attach the end of the tunnel to a huge chimney rising up into outer space to suck the air out?

Phil M1GWZ


On 22 Apr 2012, at 23:29, Joseph Bento wrote:

> Is this an upcoming broadcast?  I hope they provide you with a copy, as I'd love to hear it.  Iain corresponded, and mentioned the tubes used to carry cash, receipts, etc at banks and department stores.  They are still widely used here.
> 
> It would be interesting to see what sort of seismic protections a transport tube would need.
> 
> Yes, it is likely within our technological ability for a Transatlantic tunnel.  It would probably have to be limited to high speed rail.  I wouldn't think personal autos would be practical due to distance, fuel demands, accommodations,  not to mention accidents!
> 
> Joe, N6DGY
> 
> On 4/22/2012 2:51 PM, Phil wrote:
>> On Friday morning I was called upon by my local radio station to discuss the feasibility of this idea (the DJ is a friend of mine). Although the science is sound, the engineering problems are significant - the vacuum in the tube would have to be pretty good, and if it fails while the capsule is travelling at 4000 mph, things are going to get very hot, very quickly. Air friction would be significant at that speed. The capsule will also need a good independent air supply too. I wouldn't be queueing up to ride on the first one - the hazards are not that different from space flight.
>> 
>> Of course, building the first transatlantic tunnel has been a straightforward concept for over a century. In fact, it's amazing that no-one has done it yet…
>> 
>> Phil M1GWZ
>> 
>> 
>> 
>> On 22 Apr 2012, at 18:51, Joseph Bento wrote:
>> 
>>> I really must read more.  I had not previously heard of this method of transport.  I take it there are funding problems, or something is wrong with the concept?  It seems nearly unbelievable that one could traverse the country in about the same time I take in my morning commute.  If the cost estimates are accurate, it might seem there should be full funding for this project.
>>> 
>>> http://www.metro.co.uk/tech/896790-evacuated-tube-transport-to-enable-round-the-world-travel-in-just-6-hours
>>> 
>>> Joe, N6DGY
>>> 
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