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Old 12-24-2012, 02:11 PM   #11 (permalink)
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Urban EV.

Why would you need a big(ish) EV to do what you can do (and has been done for ages !) on foot, by bike, heck, even public transport whenever they're not on strike ?

Greenwashing, like the electric bikes that no-one really needs.
Making self-propelled, power-hungry vehicles out of what already were perfectie good, human powered vehicles ...

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Old 06-09-2019, 07:58 PM   #12 (permalink)
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To bump am old thread, it looks like the tweel is getting closer to a releasable product.

https://interestingengineering.com/p...m-and-michelin

Now known as "Uptis"
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Old 06-09-2019, 08:45 PM   #13 (permalink)
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2024, that sucks.
Global warming will have killed us all by then.
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Old 06-10-2019, 11:08 AM   #14 (permalink)
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We don't if the airless tires will have any specific advantages, but it is interesting to have this come up.
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Old 06-10-2019, 12:53 PM   #15 (permalink)
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Quote:
Originally Posted by NeilBlanchard View Post
We don't if the airless tires will have any specific advantages, but it is interesting to have this come up.
At least earlier in development they were touting reduced rolling resistance and increased lateral stiffness.

I wonder if you brake hard, if there's a weird snap-back from all those ribs allowing the wheel to twist an inch or two?

https://smartech.gatech.edu/handle/1853/37202
Quote:
1.2.2
Rolling Resistance
The main environmental advantage to the Tweel™ is its very low rolling resistance, or the constant force required to roll a wheel at a constant speed under a certain vertical load
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Old 06-11-2019, 10:16 AM   #16 (permalink)
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Probably no worse than the spring rebound on a regular car. One would think the rebound would be engineered out
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Old 06-13-2019, 03:41 AM   #17 (permalink)
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Quote:
Originally Posted by samwichse View Post
To bump am old thread, it looks like the tweel is getting closer to a releasable product.

https://interestingengineering.com/p...m-and-michelin

Now known as "Uptis"
This part is hilarious:

Quote:
The aim is for a complete reshuffle of conventional wheels and tires, so that they are fully replaced as an assembly unit for passenger cars.
In other words: $$$!Kaching!$$$

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