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Radicle Rotation
Dynamic radius wheel ( put all that perpetual motion design to good work ) | |
Design a wheel circumference made up of segments ,
each is attached to the axle bearing by a length adjustible spoke .
spoke mechanism
Pneumatic (complex) , hydraulic ( slow ?) , magnetic (electricity drain)
rack and pinion with electric motor ?
The length adjustment would have to be electronically
controlled for speed .
Avantages
with a flat tyre only one segment need be replaced , can be done without jack .
in breaking centre of weight can be shifted behind axle by lengthening after grounded spokes .
in accleration centre of weight can be shifted forward of axis .
surface area of tyre can be increased in braking by extending pre and post spokes .
leap pot holes by changing fore stroke as travelling , take speed bumps at illegal speeds ,
off road can really mean off road ,
can bounce car , for whatever reason you like .
change the car as we know it and add new motion type .
Disadvantages
? ( half bakers will have some )
. idealogy
dynamic bit of a dynamic bit of a dynamic bit .
Oh Reapplication
when the car is past prime use the Radicle rotation as a fluid pump or metal bending press .
A product should always have more then one shell of operation on the way to disintegration .
The Animal
http://www.inthe80s...m/toys/animal.shtml
This was a fun toy from the '80s that whould change wheel diameter when wheels are accelerated. Your idea reminded me of this. [Worldgineer, Oct 04 2004, last modified Oct 06 2004]
a little like the Wheelloon?
http://www.halfbakery.com/idea/Wheelloon
a bastard of the hullaballoon [FarmerJohn, Oct 04 2004]
getting there.
http://www.newscien...rticle.ns?id=dn6095
[brodie, Jan 04 2005]
Annotation:
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This was halfbaked in "Snowcrash" as a set of computer-controlled skateboard wheels that would adapt to the terrain. |
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Oh, a book , not stones and bones . |
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Each segment would have an tyre foot not a wheel .
Does Snowcrash allow for dynamic shape change of
wheel .
With modern technology I thought this idea would be doable . |
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This is pretty much exactly as in snowcrash, but with two things I like: one is use of the word "radicle", like rootlet, which made me think. The other is the final comment about "more than one shell of operation" which I very much like - a neat way to express this concept. So: bun for presentation. |
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I thought it was a typo too, but then I realized that if the spokes are considered little rootlets, radicle might be appropriate. |
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Damn, [worldgineer] beat me to the link. |
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Rephrasing : a segmented wheel that changes shape via adjustable length spokes |
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a D shaped wheel for acceleration and the opposite for braking . |
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Say car weight 1 tonne , with 4 wheels
thats 250 kg per wheel .
therefore a single spoke mechanism has to each
hold 250kg standing .
exaggerating
thats 500kg for when spoke is under motions to hold up the car . |
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if the wheel circumference is 0.2 m
At 100 km/h the spoke has to move the wheel segment in half a wheel turn .
@ 100k/hour = 100 000 m/hour = 27.7 m/s |
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the change in spoke length has to occur in half turn of wheel 0.1 m .
so 0.1 / 27.7 = 0.0036 or 4 microseconds . |
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If speed is a problem the spoke length could be locked as a wheel configuration at higher speeds . |
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Therefore spoke actuator has to change length (radius) in 4microseconds over a distance of 10 cm with a weight of 500kg ,
possible ? |
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If spoke doesn't have to support car weight , ( the rest length is a wheel configuration) then spoke only has to deal weight of segment . |
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If speed of rotation of the wheel is not a problem say in a tractor , the spoke has more time to change length and therefore more force can be generated . |
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The main forces would be needed to shorten the radius of the spoke or hold radius because of centrifugal force . |
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segment weight and centrifugal force will tend to lengthen radius . |
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The more spokes the less segment weight , but more complexity in the control equipment . |
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[wjt], can you please flesh out your annotations and ideas? This shorthand of yours is annoying. We tend to use English here. |
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Rephrase again : just like a waterwheel under a waterfall except replace buckets of water with a powered way of extending blocks of mass (the segments) |
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If the control was good , these powered wheels would not need the combustion engine , the weight of each adjusted segment with gravity would turn the wheel . (admit very slowly )
A normal engine aswell would be better . |
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We are all trying to make the machine more complex
are we not . |
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Nice idea. Kinda like some early
designs for moon&mars vehicles
which would inflate and deflate
airbags for a similar effect. They
used the effect to power the vehicle
slowly. I think on a car it would
suffer from reliability problems (i
wouldn't want to be doing 120mph
on the autobahn when an actuator
fails), apart from that, nice.
Croissant :) |
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Isn't that how technology works , some crazy person tries out the idea , other people see improvements and hope nobody gets killed or maimed in the process . |
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Sadly , I sometimes think safety , laws and money are negating the crazy part of the process . |
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I like this idea. Two other advantages are: |
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-For extra traction on mud or snow you could flatten the wheels to make them more like caterpillar treads. |
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-When turning, you can bank the vehicle by making the wheels one side bigger. |
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And the skater in "Snowcrash"
worked for Radiks Couriers IIRC. |
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Fantastic idea, too bad it would only work in a cartoon. |
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