h a l f b a k e r yViva los semi-panaderos!
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[edited from Monocycle to Unicyle - sorry for undeliferate mistale]
Youtube for RYNO or "Honda's self-balancing U3-X" or
"self
balancing monocycle".
This unicycle has pedals so when parked, you "wind
up
the
flywheel" and then when going you use the same
pedals
with gears to drive
your monocycle forward.
Parking is achieved with a double kickstand used for
comfortable first few pedal turns until the flywheel
is up
and running.
Honda UX-3
http://www.diseno-a...les/honda_ux-3.html
Note the 1 large consisting of small right angle wheels [CraigD, Oct 23 2012]
the RYNO exciting vid
http://www.youtube....watch?v=Z1YoCfm7nxU
Its clear that without a link you won't look. :-( [pashute, Oct 24 2012]
thegyrobike.com
http://www.thegyrobike.com/
Vertical gyro in wheel gives bike stability [pashute, Oct 28 2012]
Just found out about 3dtin.com
http://www.3dtin.com/w77w#
great online 3d drawing tool [pashute, Nov 11 2012]
Here's my 3d model
https://docs.google...q7xEcFVZMXJvQTlMTms
side view [pashute, Nov 11 2012]
stable cycle
http://www.youtube....watch?v=Z0m-cUxMcJw
1300 ft pounds of torque. don't need that much in our vehicle... [pashute, Nov 11 2012]
gyroscopic leverage
http://www.youtube....watch?v=JRPC7a_AcQo
[pashute, Nov 11 2012]
Flywheel Unicycle
Flywheel_20Unicycle
[marklar, Nov 12 2012]
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How do you balance when cycling in place? Do you lean
against a wall or something? |
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That's the point of the gyroscope, presumably? |
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But that would require the flywheel to already be spinning
when the stationary pedaling commenced, wouldn't it? |
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Okay then. Thank you for such a clear and illustrative
responce. |
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No more so than a bicycle would have to already be
moving before you pedal it to stay upright. |
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I edited the idea with a clearer explanation of the
startup
sequence. A double kickstand is used when parking
and
getting flywheel wound up for the first time. Also for
parking when off the bike. |
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Thanks Alter-Other for bringing this up. |
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If you look at RYNO youtubes you'll "get the kick of
it". |
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// Jewish mother: Kick both ways before you oyver
the
road. (Kick - Yiddish for Look. Oyver - Yiddish for
Crossing-over) |
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The flywheel is going to bollix up the turning ability of the monocycle, unless you put a right-angle drive in there, so the flywheel is horizontal. |
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// All power for self balancing and forward drive come from pedals // |
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Erm, my unicycle already has that. |
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//The flywheel is going to bollix up the turning
ability of the monocycle, unless you put a right-
angle drive in there, so the flywheel is
horizontal.// |
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I think the Honda UX-3's gyros are small, several,
possibly gimbled. They're adapted from Honda's
small humanoid Asimo robot. |
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The thing turn pretty easily, but that's not
essential to driving it, as, due to its many little
wheels turning on a big wheel arrangement, it will
go in any direction it's leaned |
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Pedaled gyro monocle please. |
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The link makes things a little clearer, but the look on that
model's face says "Really? You're kidding, right?" |
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//The flywheel is going to bollix up the turning ability of the monocycle, unless you put a right-angle drive in there, so the flywheel is horizontal.// Worse, as no (passive) stability is provided about the axis of a flywheel, unless the axis is vertical, it will immediately fall over. And torque that is not coaxial with the flywheel causes precession, so a vertical axis will make the monocycle roll wildly to the left or right when you attempt to accelerate. |
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You may have misunderstood how the UX-3 works. The gyroscopes do not (and could not) directly provide balance. They are used to sense orientation, and balance is achieved actively by feedback to the wheel - like a segway, but in two axes instead of one. |
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Bad science; 'just add flywheel'. |
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The balance is definitely achieved by the flywheel.
Watch the RYNO video in the
link, see the person lean on the bike. Then read the
material on the web about it. Also look at the
thegyrobike link I'm adding now. Stability for kid's
bikes. And its a vertical flywheel not horizontal. |
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I was referring to the UX-3, which uses active balancing (like a segway) about two axes. Yes, the RYNO and the gyrobike appear to use a flywheel for roll stability, but use active balancing (like a segway) and two wheels, respectively, for pitch stability. I contend that it is not possible to achieve passive roll and pitch stability in a propelled unicycle using a flywheel alone. |
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I'm not saying that your idea won't work at all, but the rider would at least need to provide active pitch balancing, to avoid falling over forwards or backwards (assuming a horizontal, left-right orientated axis). |
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here's my 3d model. Should work. |
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Will provide a few youtube examples of this. |
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That won't work. The centre of gravity is well forward of the support point (the back wheel), making it even worse than I described. It will immediately fall over, even before you try to move, in a rather horrible twisting manner. |
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I had a similar idea a couple of years ago [link]. |
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