Pedrail Wheel -- Looking for the physical explanation

AI Thread Summary
The discussion centers on the physical principles behind the pedrail wheel, which enables vehicles to traverse rough terrain and climb stairs by using a mechanism that resembles tank treads. Participants emphasize the importance of visual aids, like videos and diagrams, to understand its operation, noting that the hub design helps maintain contact with the ground. There is interest in creating a simplified version of the pedrail wheel that could fit over standard tires, with suggestions that such adaptations could enhance vehicle performance in challenging conditions. Additionally, the Dreadnaught wheel is mentioned as a similar concept that could provide a smoother ride and might be adaptable for classic cars. Overall, the conversation highlights the potential for innovation in vehicle mobility technologies.
Mgt3
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What is the physical explanation behind the pedrail wheel?
What is the physical explanation behind the pedrail wheel (a.k.a the walking wheel). Someone said it "makes it's own road", but how does it allow a vehicle to climb stairs, navigate rough terrain etc.? I have looked all over the Internet and even visited a university library, but information on this system is limited. I am trying to learn the operative principle(s) underlying this mechanism.

https://en.wikipedia.org/wiki/Pedrail_wheel
http://cyberneticzoo.com/walking-machines/1900-pedrail-walking-wheel-bramah-j-diplock-british/

Would it be possible to fashion a simplified version of the pedrail wheel that fit over a regular tire?

Thanks!
 
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I'm not sure what you mean by operating principles. This is a case where pictures are better than words. Watch this video and then you can ask questions about it.

 
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Mgt3 said:
Would it be possible to fashion a simplified version of the pedrail wheel that fit over a regular tire?
That sounds like an opportunity! i.e. if someone had solved this problem already, you wouldn't have an opportunity to make your millions by solving it yourself.

The device is simpler than it may look. Between the video anorlunda provided and the wiki age diagram, you can derive the operating principles. It's akin to a tank tread, but as short as possible.
 
anorlunda said:
I'm not sure what you mean by operating principles. This is a case where pictures are better than words. Watch this video and then you can ask questions about it.



Thank you! Is the wheel simply riding over the feet?
 
Mgt3 said:
Thank you! Is the wheel simply riding over the feet?
Not quite. The hub (which is attached to the axle) has a flat bottom that forces the bottom four or so feet into a flat, surface-hugging shape - much like the tread of a tank does.

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I just realized - it is functionally equivalent to simply riding on flat tires! (And that is possibly the secret to making this a practical invention.)
 
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DaveC426913 said:
Not quite. The hub (which is attached to the axle) has a flat bottom that forces the bottom four or so feet into a flat, surface-hugging shape - much like the tread of a tank does.

What would prevent this from losing traction in mud and allow a two wheel drive tractor to go in places a regular two wheel drive vehicle could not?
 
Mgt3 said:
Could it be possible to fashion a simplified version of the pedrail wheel that fit over a regular tire?
The Dreadnaught wheel will give a smoother ride, and could be adapted to fit onto a tyre if there was sufficient clearance, or smaller wheels were used.
 
Baluncore said:
The Dreadnaught wheel will give a smoother ride, and could be adapted to fit onto a tyre if there was sufficient clearance, or smaller wheels were used.
How does a Dreadnaught wheel work?
 
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Would that be too terribly hard to fabricate for a classic car?
 
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