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This is really cool. For people just tuning in: this is a test of pods in a vacuum tube travelling by their own power. Designed by students. A pod just got 94km
by gizmo 10y ago
This is really cool. For people just tuning in: this is a test of pods in a vacuum tube travelling by their own power. Designed by students. A pod just got 94km/hr top speed.
- smbullet 10y agoIt's not by their own power, there's a pusher vehicle bringing them up to speed.
- shadowfacts 10y agoThe pusher is only accelerating the test vehicles up to a fraction of that, so that they can achieve levitation and after that the vehicle is under its own power. It wouldn't make for much of a competition if the SpaceX vehicle was the one doing all the work.
- smbullet 10y agoAlmost no pods have any kind of self propulsion. IIRC the whitepaper states the use of linear accelerators on the tube I-beams to propel the pod. That hasn't been integrated in the competition so the teams just coast at the pusher's 94km/h
- skykooler 10y agoThe pushers max speed was 80 km/h. The Warr team accelerated past that to hit 94.
- flukus 10y ago> A pod just got 94km/hr top speed. Why is that impressive?
- AtheistOfFail 10y agodecent aerodynamics?
- OV-104 10y agoAerodynamics are negligible in a vacuum.
- nothrabannosir 10y agoIsn't it a vacuum?
- Geee 10y agoNo. There's enough air pressure to potentially lift and cushion the pod in the pipe (at least in the original plan). However most pod designs (I think) use magnetic levitation for lift.
- rmccue 10y agoIt's specifically not a vacuum, but rather a low pressure system. > Just as aircraft climb to high altitudes to travel through less dense air, Hyperloop encloses the capsules in a reduced pressure tube. The pressure of air in Hyperloop is about 1/6 the pressure of the atmosphere on Mars. This is an operating pressure of 100 Pascals, which reduces the drag force of the air by 1,000 times relative to sea level conditions and would be equivalent to flying above 150,000 feet altitude. A hard vacuum is avoided as vacuums are expensive and difficult to maintain compared with low pressure solutions.
- stephen_g 10y agoYou're using faulty definitions there. Even outer space is not a 'true' vacuum. Any pressure lower than atmospheric pressure is considered a partial vacuum. 100 Pascals in a lab would be considered a 'medium' vacuum. And in a tube the size of an actual full-size hyperloop, even that will probably be extremely difficult and expensive to achieve. I think the hyperloop will end up being technologically unviable mostly because of the cost and the limitations of technology (like the expansion joints that will be required on a decently long track), but I hope I'm wrong on that. It may lead to new innovations which will be good.
- imglorp 10y agoIt's impressive because these students are breaking new ground. One competitor just said they didn't know anything about batteries in vacuum, just for one example, and had to bring in an expert on that, among other challenges. 94km/h is a first step towards 1200km/h.
- Retric 10y agoIt's also a short track and 1/2 scale (1/8th volume) cars making 94km/h fairly difficult.