Your universe must be awfully noisy. Look closely the next time you are near a train wheel (but please don’t put yourself in danger).
BART, maybe? That always was an… unusual… characteristic (mis?)feature of the BART system.
Last I looked, though, BART was in the process of converting its fleet from a cylindrical to tapered wheel profile. See, f’rex:
Streetsblog: BART Makes Headway against Headache-Inducing Howl
Wheel-Rail Seminars: BART Wheel Profile Change - Wheel Rail Seminars [PDF]
(Good tech details for rail nerds.)
Or are you somewhere else?
(…and do your train wheels screech and howl?) (-:
first off, this conical wheel design isn’t universal. Second, the slope of the wheel is on the order of 1:40 to 1:20
Third, this only works for gradually curving track
I’m sure it’s been backed up to the cloud somewhere.
Now that you mention it, a description of how coins go into the parking meter would be pretty interesting.
I think it’s on github, actually.
To recover your lost code and avoid leaking it: Send us 0.1 Bitcoin (BTC) to our Bitcoin address 1ES14b7qLb5CYjLMUekctxLgc1FV2Ti9DA and contact us by Email at firstname.lastname@example.org with your Git login and a Proof of Payment. If you are unsure if we have your data, contact us and we will send you a proof. Your code is downloaded and backed up on our servers. If we dont receive your payment in the next 10 Days, we will make your code public or use them otherwise.
The Long Now Foundation is working on this problem. See, for example:
Nice explanation, but a lot of trains can work without a rigid axels: Modern Trams use “free” wheels a lot as it allows lower floors and the high-speed TALGO trains have always had them for the same reason, the newer generation even “hanging” the wheels from the roof to let the train sway in the curves (look, ma, no active system that can go wrong, just reliable old physics):
how to prevent jumping out of tracks: connect the wheels otherwise, no rigid axle
One other feature that Talgo offers is the ability to have cars automatically adjust gauge, so a train can run through between Spain (1668 mm gauge) and France (1435 mm standard gauge) without having to stop and have the bogies under the cars exchanged.
But variable gauge isn’t unique to Talgo.
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