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British Expats (https://britishexpats.com/forum/)
-   The Sand Pit (https://britishexpats.com/forum/sand-pit-116/)
-   -   Dubai to AD in 12 mins (https://britishexpats.com/forum/sand-pit-116/dubai-ad-12-mins-887452/)

Inselaffen Nov 15th 2016 10:56 pm
Re: Dubai to AD in 12 mins
 
Originally Posted by Bahtatboy (Post 12106475)
Maglev's the answer. Just not Chinese.
took the shanghai maglev a couple of years ago. Unfortunately it wasn't up to full speed that day. just a bit over 300 km/h

Bahtatboy Nov 16th 2016 12:19 am
Re: Dubai to AD in 12 mins
 
Originally Posted by Inselaffen (Post 12106485)
took the shanghai maglev a couple of years ago. Unfortunately it wasn't up to full speed that day. just a bit over 300 km/h
Was it impressive?

IKnowNothing Nov 16th 2016 12:32 am
Re: Dubai to AD in 12 mins
 
Originally Posted by weasel decentral (Post 12106296)
Railway tracks suffer from the same problems, perhaps even more as they are thin narrow strips. Its still possible to run trains at 300 kmph despite that.

A tube within a tube would easily solve your heat transference problem.
A railway track has a lot more mass than a 3mm pipe.

A tube within a tube, yeah i kinda get this, however, the inner tube still needs to be at basically a vacuum.

And more to the point, how will the VVVVVVVIP capsules be able to pas the VVVVVVip ones?

Inselaffen Nov 16th 2016 12:46 am
Re: Dubai to AD in 12 mins
 
no doubt they'll get a goat herder from Bangladesh to operate the capsules!

Inselaffen Nov 16th 2016 12:56 am
Re: Dubai to AD in 12 mins
 
Originally Posted by Bahtatboy (Post 12106522)
Was it impressive?
yeh it was pretty smooth and cool how it banked to take the bends. would have been better if it had gone over 400 as its supposed to.

weasel decentral Nov 16th 2016 3:26 pm
Re: Dubai to AD in 12 mins
 
Originally Posted by IKnowNothing (Post 12106530)
A railway track has a lot more mass than a 3mm pipe.

A tube within a tube, yeah i kinda get this, however, the inner tube still needs to be at basically a vacuum.

And more to the point, how will the VVVVVVVIP capsules be able to pas the VVVVVVip ones?
The mass is not relevant for the train tracks, it is the fact that it is much longer in one direction that the other, this is where the differential in expansion happens.
A vacuum isn't any more difficult to create than high positive pressure. Look at the old school pneumatic tubes used in hospitals or offices, some of them were pressure based and some were vacuum based.


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