Captain
Join Date: Jun 2012
Posts: 5,415
# 11
03-05-2014, 11:06 PM
Quote:
Originally Posted by lilchibiclari View Post
1: You need a nearby conductor to repel against (such as a metal plate or rail that is firmly anchored in place)
We could implement this for the highways and it would make flat tires a thing of the past, but it might be inefficient to use it since maglev trains are far more effective for it than maglev cars.

If hoverboards require negative matter, then we might get Warp Travel at about the same time as hoverboards so that means about 50 years if we try to match Cochrane's first warp travel flight.
Captain
Join Date: Jun 2012
Posts: 1,887
# 12
03-05-2014, 11:48 PM
In that second video he wasn't using an especially strong magnetic field but he must have had the computer controlling the magnets fairly precisely to keep the pinball floating that level.
Maglev cars would work in an enclosing trench to keep the vehicle on track otherwise it wouldn't be any safer than a hovercraft, any amount of wind or lateral force and the car would be all over the road. Efficiency wise I would imagine a smaller vehicle like a car would be much more aerodynamic than a train, but maglev roadways would be far more expensive to build and maintain than a maglev rail system, which is an important factor to consider when discussing efficiency.
As long as we are talking about maglev, I did like the idea of how magnetic levitation was used as a bearing and propulsion system in the movie I Robot where vehicles used magnetic levitation to float on spherical wheels.
If something is not broken, don't fix it, if it is broken, don't leave it.
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Captain
Join Date: Jun 2012
Posts: 699
# 13
03-06-2014, 12:23 AM
Hovering cars in general also have the problem that you can't brake or turn corners as rapidly as you could if you had actual traction--your sixty-to-zero time and distance would be as large as your zero-to-sixty time and distance.
How many Starfleet Engineers does it take to exchange an Anti-positronic Photon Emitter?
Rihannsu
Join Date: Jun 2012
Posts: 12,153
# 14
03-06-2014, 08:16 AM
I remember back in the 80s when mini-aircraft were the rage. There do exist designs of craft that can be driven down a road, then unfold the wings and take off. They're definitely functional vehicles, the key issue is that FAA rules make them so impractical it's not funny.
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Captain
Join Date: Jun 2012
Posts: 699
# 15
03-07-2014, 10:48 PM
Yes, current flight rules require pilots to declare their intended flight path before takeoff and wait for clearance. That model is not conducive towards flying to the grocery store, and then making an unplanned stop at the post office. For mass use of personal flying vehicles to be practical, the system must be able to handle a billion unscheduled takeoffs and landings nationwide per day, with destinations added, deleted, or changed with only a few minutes' notice.

The second problem is that the majority of people just aren't competent to fly safely using current aircraft and regulations. It's not merely that we aren't educated in how to fly an airplane or helicopter--it's that 60-70% of adults would flunk out of flight school. Imagine the worst idiots you have encountered on the road--and then imagine said idiots flying through the air at four or five times the speed of ground traffic.

Both of these issues could be solved by having the aircraft networked and computer-controlled, but there will be plenty of die-hards who would refuse to trust their lives to a computer.
How many Starfleet Engineers does it take to exchange an Anti-positronic Photon Emitter?
Captain
Join Date: Jun 2012
Posts: 1,887
# 16
03-07-2014, 11:45 PM
Quote:
Originally Posted by lilchibiclari View Post
Hovering cars in general also have the problem that you can't brake or turn corners as rapidly as you could if you had actual traction--your sixty-to-zero time and distance would be as large as your zero-to-sixty time and distance.
hovering using just air lift, yes, it's acceleration/deceleration rates would be terrible, but if it were using magnetic levitation then it would be using electrodynamic braking just like a mag lev train uses, the timing of the drive coils is reversed so that instead of moving the vehicle forward, it acts like a brake and opposes the vehicles forward momentum.
If something is not broken, don't fix it, if it is broken, don't leave it.
Oh Hell NO to ARC........One Ring to Rule Them all........
Captain
Join Date: Jun 2012
Posts: 5,415
# 17
03-08-2014, 08:08 AM
Quote:
Originally Posted by lilchibiclari View Post
Yes, current flight rules require pilots to declare their intended flight path before takeoff and wait for clearance. That model is not conducive towards flying to the grocery store, and then making an unplanned stop at the post office. For mass use of personal flying vehicles to be practical, the system must be able to handle a billion unscheduled takeoffs and landings nationwide per day, with destinations added, deleted, or changed with only a few minutes' notice.

The second problem is that the majority of people just aren't competent to fly safely using current aircraft and regulations. It's not merely that we aren't educated in how to fly an airplane or helicopter--it's that 60-70% of adults would flunk out of flight school. Imagine the worst idiots you have encountered on the road--and then imagine said idiots flying through the air at four or five times the speed of ground traffic.

Both of these issues could be solved by having the aircraft networked and computer-controlled, but there will be plenty of die-hards who would refuse to trust their lives to a computer.
If such a system is ever implemented, then travel will be done by some national computer system with only certain people actually able to manually fly and in only certain areas. So people would tell their car where they want to go and the car would send a signal to some network and get the instructions from that to get to the appropriate destination.
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