The R.I.O.T. Wheel

That looks like a death trap. If that seat ever touches the ground
while seriously riding, that guy will get crushed underneith the wheel.
As soon as the base of the wheel hits something, like a rock or pot
hole, the bottom of the wheel will slow, relative to the top of the
wheel, in terms of forward velocity, and the wheel will suddenly force
the seat into the ground.... i think. I couldn't imagine the computer
and mechanics for the balancing mechanism being fast enough to move the
extra weight backward to rebalance the thing. Good luck to the guy
though.

--
hecklar - Slightly-skilled Unicyclist
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hecklar said:

*That looks like a death trap. If that seat ever touches the ground
while seriously riding, that guy will get crushed underneith the
wheel. As soon as the base of the wheel hits something, like a rock
or pot hole, the bottom of the wheel will slow, relative to the top of
the wheel, in terms of forward velocity, and the wheel will suddenly
force the seat into the ground.... i think. I couldn't imagine the
computer and mechanics for the balancing mechanism being fast enough
to move the extra weight backward to rebalance the thing. Good luck
to the guy though. *

The tire will absorb anything it hits. So long as it isn't too big. A
rock like 3 inches high will just get rolled over. The tire is being
used with no air.

The amount of angular momentum obtained by the combination of the 65
pound steel flywheel at over 2000 rpm and the rotation of the 300+ lb
wheel will keep the thing somewhat steady at speed.

The bottom of the chassis is designed to be able to slide along the
ground should it come into contact. It is also designed so that the
rider can't be crushed. So they say anyways.

Read.

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This has been mentioned in JC before as well as some other threads.
Here's the link to the actual site. http://theriotwheel.com/

--
spickydoo - one hot wheel

"Did you try poking him with a stick?" - John Travolta
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Klaas Bil said:

*Powered with a 200 hp electric motor, this contraption is planned to
break the world speed record for single-wheeled vehicles, that
allegedly stands at 90 km/h. (Hey, who holds that old record and with
what?). *

The current single wheel speed record is held by Kerry McLean with a
motorized monowheel.

'McLean monowheel link 1' (http://tinyurl.com/rx11)
'McLean monowheel link 2' (http://tinyurl.com/v8sj)

The site mentions that he has plans to go for a 100 mph record. That
would give the RIOT Wheel something to shoot for. I wonder which one of
them will get there first.

--
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john_childs posted:

Quoted message said:

'McLean monowheel link 1' (http://tinyurl.com/rx11)

I noticed from that page that a lecturer at Bath University (Geraint
Owen) built a monocycle the year after I graduated. If only he'd done
it a couple of years earlier I might have been able to blag a go :-(

--
Danny Colyer (the UK company has been laughed out of my reply address)
<URL:http://www.speedy5.freeserve.co.uk/danny/>
"He who dares not offend cannot be honest." - Thomas Paine

That almost looks like it should be in the pod races in the Star Wars
movie.

B

--
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"The bottom of the chassis is designed to be able to slide along the
ground should it come into contact. It is also designed so that the
rider can't be crushed. So they say anyways."

Sure it would slide going 5 or 10 km/h, like in the demo movie, but 90+
km/h?

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hecklar - Slightly-skilled Unicyclist
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I believe that the only time the chasi would have a chance of touching
the ground would be during braking hard, so hopefully this wouldnt be
much of a problem.

this machine does not have to do any sort of balancing. There is a huge
counterweight inside the wheel below the axel and another one behind the
axel, and the tire is so wide that lateral balance is no concern.

--
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binary, and those who don't" -My T-shirt

"Oh, man! You are sooo normal. Grow up!" -Bart Simpson

"I think the seat de-ultimatizes it" -johnfoss
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I WANT ONE OF THOSE!!!!!!!!!!😄

--
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check out my groups website at www.vanuni.com

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PhilS said:

*this machine does not have to do any sort of balancing.*

True, but it does have to make an effort to stay right side up and not
dig into the ground. Applying power to the wheel causes the nose to tilt
up. The more power, or the quicker it's applied, the more tilt. Same for
braking, which will point the nose downward. The faster you go, the more
chance there is for something to cause a tilt.

The worst thing would be to hit some sort of bump during braking, if the
frame is on the ground. I'm sure for a higher-speed model the builders
will think to give it very good skids that can get over most anything
that will be in its path. For speed records I'm sure they will seek a
very flat runway.

Quoted message said:

*the tire is so wide that lateral balance is no concern. *

If there is indeed no steering mechanism, this makes the machine even
more dangerous as speeds increase. Anything that may cause it to go a
little crooked will send it toward a curb, or other un-planned
obstacles. Are you sure there's no provision for steering it?

--
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John Foss, the Uni-Cyclone
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johnfoss said:

*
If there is indeed no steering mechanism, this makes the machine even
more dangerous as speeds increase. Anything that may cause it to go a
little crooked will send it toward a curb, or other un-planned
obstacles. Are you sure there's no provision for steering it? *

from www.theriotwheel.com/tech_steering.html

The driver controls the direction of travel using
the joystick, and, depending on the speed, by
shifting left or right on the rolling seat. The
joystick controls solenoids that roll the gyro,
producing precession forces that yaw the wheel.
As with a bicycle or motorbike, at slow speeds
you yaw in the direction you wish to go, but at
higher speeds you yaw in the opposite direction.
This rolls the vehicle into the desired turn
direction.

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johnfoss said:

*True, but it does have to make an effort to stay right side up and
not dig into the ground. Applying power to the wheel causes the nose
to tilt up. The more power, or the quicker it's applied, the more
tilt. Same for braking, which will point the nose downward. The faster
you go, the more chance there is for something to cause a tilt.
*

I believe that there is a counter-weight on other side of the rider for
the rider to stay up-right, and there is another one that hangs from the
axel and swings forward and backward to go and stop.

so the rider shouldnt go up and down too much.

--
PhilS - n/a

"There are only 10 types of people in the world - Those who understand
binary, and those who don't" -My T-shirt

"Oh, man! You are sooo normal. Grow up!" -Bart Simpson

"I think the seat de-ultimatizes it" -johnfoss
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"hecklar" <[email hidden]> wrote in
message news:[email hidden]...

Quoted message said:

That looks like a death trap. If that seat ever touches the ground
while seriously riding, that guy will get crushed underneith the wheel.
As soon as the base of the wheel hits something, like a rock or pot
hole, the bottom of the wheel will slow, relative to the top of the
wheel, in terms of forward velocity, and the wheel will suddenly force
the seat into the ground.... i think. I couldn't imagine the computer
and mechanics for the balancing mechanism being fast enough to move the
extra weight backward to rebalance the thing.

You totally underestimate the efficiency of computer controller servo
systems.
They usually make our feeble efforts look terribly wobbly.

Nao