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# Tire-Rim-Anchored Traction Vanes

Boost Traction with Retractable Vanes Inside a Receptacle Bolted to Tire Rim
 (+1, -1) [vote for, against]

A receptacle bolted to a tire rim contains retractable vanes inside, which can be deployed to boost traction.

Using the example of an off-road vehicle which is stuck in the dirtor snow, with tires spinning and unable to grip - the vanes would deploy, projecting out of a receptacle bolted the tire rims, to extend in a radial direction, giving more traction in the dirt.

A solenoid switch would be used to unlock the vanes to allow them to deploy. The rapid rotation of the tires would generate the centrifugal force necessary to ensure the vanes extend fully outward in a radial direction. Their length when fully extended would be greater than the radius of the tire.

As soon as the vehicle is free, and tire RPM is slowed down, then the vanes can be retracted back into the receptacle.

 — sanman, Nov 04 2020

Go ahead and jump to the 3:00 mark. [2 fries shy of a happy meal, Nov 04 2020]

Bog Clogs https://forum.ih8mu...6_s0274-jpg.230604/
link to image of them [sanman, Nov 04 2020]

[2 fries shy of a happy meal, Nov 05 2020]

 The hub caps would be larger diameter, and that diameter would exceed the radial thickness of the tire itself, as is common on many sportier vehicles today.

To produce traction, the vanes would have to bear the weight of the vehicle, and would do this by locking into place, once they have extended out. This would be accomplished by the rapid rotation of the tires, and the centrifugal force generated by them. Each vane would independently extend out and lock into place, as its particular spot on the tire rotated upward away from the ground (7 o'clock position onward?) As the arc-position of each vane rotates upward and away from the ground, it's free to fully extend outward since it's not bearing the load of the vehicle. Once each vane locks into place, then it will stay fully extended even as its particular spot on the tire rotates to the load-bearing ground-facing position (5 o'clock position onward?) Thus all the vanes don't extend out and lock in exact simultaneous unison, but rather in quick succession as they quickly rotate along the rotational arc of the tire. The outer portion of each vane would have more mass, which will help it to catch more centrifugal acceleration to aid it in extending outwards, and this mass would also contribute to load-bearing sturdiness.
 — sanman, Nov 04 2020

Okay, I should have said tire rims - let me revise. What I meant is that you can have tire rims that are large, while the surrounding tire isn't that much larger than the rims.
 — sanman, Nov 04 2020

 [kdf] If they're made of a strong alloy, then why would the vanes break like the wooden post shown by that farm tractor vid?

 Never mind what I said about sport vehicles. I'm talking about large diameter rims. Surely that's not hard to picture. And so that large rim-diameter provides ample space in which to stow the vanes, which can project out to extend beyond the radius of the tire itself.

Yes, the vanes would deploy with the wheels slipping -- the fact that the wheels are slipping is why you're seeking to deploy the vanes in the first place -- to aid your wheels in no longer slipping.
 — sanman, Nov 04 2020

 — pocmloc, Nov 04 2020

[kdf] - It would be an electronic signal to a solenoid that would cause the vanes to become available, while the RPM would then drag them out. Until and unless the solenoid switches, then no amount of RPM will allow the vanes to come out.
 — sanman, Nov 04 2020

Many years ago, I remember an article (or possibly an ad...) in a science magazine for the "static" version of this (Google was no help finding them...).
Basically it was a (strong) plastic paddle wheel that was bolted to the wheel (using the normal wheel-hub bolts), to aid with traction in mud/swamp etc. Not larger than the tyre diameter, though, so you could drive normally with them attached. I think they were called "Bog Clogs".

"Bog Clogs"... hmm... sounds like they were onto something. See the new link I've attached.
 — sanman, Nov 04 2020

[kdf]; nice find.
[sanman]; yup, just like that, although I thought they were smaller (relative to the wheel...).

That pic is from a Japanese mini-truck, so that's why they look bigger relative to the vehicle
 — sanman, Nov 05 2020

Perhaps if the inner portion of the steel wheel, the flared portion at the lip that retains the tire bead, were flared more dramatically such that notches could be cut in the perimeter. Vanes that might sprout from the hubs could splay across the tire tread and hook into these notches and then not flail and break.
 — whatrock, Nov 05 2020

This reminds me of a toy from when I was a kid.
 — 2 fries shy of a happy meal, Nov 05 2020

I think there is some confusion caused by regional terminology. When I use "tire" (or "tyre") I mean just the rubber part. The wheel bolts onto the hub. The tyre goes onto the rim of the wheel. When a car gets a flat tyre, I get out the spare wheel - which has a tyre on it. To change a wheel, I use a hub spanner (wrench). To change a tyre, I use tyre levers (irons) and curses. When [sanman] says //tire//, he means wheel.
 — spidermother, Nov 05 2020

 4x4's of the 70's and early 80's used to have manual locking wheel hubs that you turned to engage. This could be something similar with some sort of cam system to deploy.

However, the unsprung jounce weight would be horrid. It would want to be a temporary bolt-on, not a permanent add.
 — RayfordSteele, Nov 05 2020

 [annotate]

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