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#16 DocM

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Posted 13 August 2013 - 02:18

Will this be a US only thing, or will the technology be adapted for global use ?

He's open sourcing it, but he's changed his mind about not building it and does plan to build a demonstrator. Announced that in a teleconference this afternoon.

In the PDF he addresses overcoming the Kantrowitz Limit, the speed limit imposed on a pod in a tube by the trapped column of air ahead of it. His solution: divert it with an electric fan, not unlike a high-bypass turbofan engine and with some of it being used to levitate the pod.

Guess this will slightly delay his other idea: an electric passenger / cargo "jet."


#17 Salutary7

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Posted 13 August 2013 - 03:05

He's open sourcing it, but he's changed his mind about not building it and does plan to build a demonstrator. Announced that in a teleconference this afternoon.

Guess this will slightly delay his other idea: an electric passenger / cargo "jet."

 

Good news if he really goes through with a working demonstration. He is in a very rare position to be in control of the kind of talent that can make it happen--though I imagine the engineering challenges will be quite a bit more difficult than he's making them out to be.

 

As far as powering aircraft goes, specific energy (i.e. energy per mass) is a dominating factor. I don't see how we can replace jet fuel at 43MJ/kg with today's batteries at around 1MJ/kg. The best experimental batteries still don't even come close, and of course the payload of jet fuel decreases over the course of the flight.



#18 Shiranui

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Posted 13 August 2013 - 06:57

The world needs more Elon Musks.



#19 OP Hum

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Posted 13 August 2013 - 12:37

I wonder if Musk is planning to shell out the billions to build his hyperloop.



#20 Earthworm_Jim

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Posted 13 August 2013 - 12:45

I wonder if Musk is planning to shell out the billions to build his hyperloop.

 

 

Kickstarter ???? LOL



#21 Growled

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Posted 13 August 2013 - 12:51

I don't see why we don't try it. New York to LA would be a no brainer.



#22 exotoxic

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Posted 13 August 2013 - 13:03

What would happen if someone were to fire a gun in to the front of it while it was going ~700mph??



#23 Geoffrey B.

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Posted 13 August 2013 - 13:05

I was reading through the document on this and one of the major flaws i was looking at in in response to torque on the "pod" itself. both when going around curves and once you reach the cruising speed of the "pod" itself it might try to roll inside the tube.



#24 +Chicane-UK

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Posted 13 August 2013 - 13:07

The world needs more Elon Musks.

 

Precisely my thinking. Hard not to have a LOT of respect for the guy. 



#25 DocM

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Posted 13 August 2013 - 15:59

What would happen if someone were to fire a gun in to the front of it while it was going ~700mph??

Given that bullets travel several times that fast they would pull away from the pod and hopefully run out of energy before impacting the pod in front of the one where it was fired. If it hit nothing it would fall to the floor of the tube at a greatly reduced velocity.

I wonder if Musk is planning to shell out the billions to build his hyperloop.


When building the SpaceX Falcon 1, the testbed for their Falcon 9 technologies, and its pads & factories he did it all on his own dime.

#26 vetneufuse

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Posted 13 August 2013 - 16:06

so all he did was come up with something that's been came up with before?.... This is not a new idea it was proposed a while ago in California also, and someone proposed one from NY to LA a while ago... same concept



#27 DocM

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Posted 13 August 2013 - 17:27

The concept is similar, but the technologies and methodologies are very different. Similar to the experience at SpaceX - others have built rockets before, but not the same way or as economically.

Example: no one else can build 400-700 very high efficiency rocket engines a year. These engines have a throw weight (thrust vs. engine mass) of 150:1 to 160:1 while most others run under 80:1. They're also designed to be reusable.

It's not revolution but high level evolution.