Non-perpendicular hub. Testing video

Awesome! I like the music. But was it hard to ride, it looks like it
would be sipmle since the play doesnt move under you. Please post some
pics of how you did it...

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Interesting. The wheel on my Torker is shaped something like that at the
moment, except it rubs against the frame.🙄

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Jonathan Miersma - Unicyclist, Violinist, and Juggler
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It is disappointingly easy to ride, but it looks cool.

With still pics it looks pretty much like an ordinary wheel, but the
spokes are all made different lengths to get the effect. It is about
30mm out of true from side to side but the wheel is completely flat so
it should be quite strong.

It was quite hard to get the frame wide enough so the wheel didn't rub
on the sides.

Thanks for your interest,
/\/\

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In the present configuration it looks like it exaggerates the natural
wheel wobble. I wonder how different it would feel if you took the
cranks off and re-attached them in the opposite position (180
degrees).

Seeing this video makes me think that a slightly non-perpendicular hub
might actually be a good thing if it exactly compensated for the natural
wheel wobble. I guess it would have to be customized, since different
riders have different amounts of wobble. Probably would depend on how
heavy your legs are, and how bow-legged or knock-kneed you are.

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Very nifty effect (if it's on purpose, as in your case!!! 😄) Thanks
for sharing your creation with us. BTW, I'm sure it draws alot of
attention from spectators; as if a unicycle isn't enough... :p

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That gives me the idea of taking Sean's old, tacoed, torker rim(See 2004
CMW pics) and making a frame for it. The wheel is actually made into an
"S" shape, so I think it would have the same effect. But definetly looks
cool, and fun to ride(even if it isn't that challenging) Something we
should all try.

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dogfeathersvt said:

In the present configuration it looks like it exaggerates the natural
wheel wobble. I wonder how different it would feel if you took the
cranks off and re-attached them in the opposite position (180
degrees).

Seeing this video makes me think that a slightly non-perpendicular hub
might actually be a good thing if it exactly compensated for the natural
wheel wobble. I guess it would have to be customized, since different
riders have different amounts of wobble. Probably would depend on how
heavy your legs are, and how bow-legged or knock-kneed you are.

I was thinking along the same lines when I saw the movie. However, I
hadn't figured out yet that the present configuration would ADD to
wobble. So I was going to ask the question that your video asks as
well "Why would you want to do that? Reduce wobble?" Because indeed it
might be a good thing.

You say that the wheel is flat and hence should be quite strong. That
may be but if you hop on it, you still put sideways force on it even
if you're hopping straight. So the net effect is that you can more
easily damage the wheel from hopping/dropping.

The video was very good BTW at demonstrating the effects that you
built into that wheel. And a nice small download too.

Klaas Bil - Newsgroup Addict
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I was wondering about building a Taco'd wheel but I see you were already
involved in 'Wheel Builder Gets Drunk' (http://tinyurl.com/4fdwa)
'(direct link to image)'
(www.unicycle.uk.com/images/Miarkonwonky.jpg).

In watching the vid it too make me wonder whether a wheel could be built
to compensate for the wobble so the contact patch remains in a straight
line. This may be the design to do it.

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Steve

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The taco'd wheel you mention was the inspiration for this one. Trouble
with the taco’d wheel is that all the strength is in the rigidity of the
rim, tightening the spokes just collapses the wheel.

I have just uploaded a better quality version of the video & added the
music credits to Chris Eaton (contactable through me for gigs etc in
Europe).

Have a look in my video album for:
2 min vid of uni with non-perpendicular hub.

http://gallery.unicyclist.com/MikeHinson

Thanks,
/\/\

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"I have to overcome a 'stress hill' when tightening the nuts, but once
installed they sit in a 'stress valley'. "

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Is it possible to create the wheel so the spokes could compensate for
the weakness of the rim, so it wouldnt collapse??? It is probably doable
but not worth the money or effort...

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Catboy said:

*Is it possible to create the wheel so the spokes could compensate for
the weakness of the rim, so it wouldnt collapse??? It is probably
doable but not worth the money or effort... *

I believe it is physicaly impossiable because the rim is like the arch
of a bridge, it has to be very strong in compression and the spokes can
only compress it in one plane.

I was asked to make another taco'd wheel for a fun unicycle but I have
declined because of this belief.
/\/\

PS the yellow band is my "signature" and carries a serial number.

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mike.hinson - Unicyclist since Nov 2000

"I have to overcome a 'stress hill' when tightening the nuts, but once
installed they sit in a 'stress valley'. "

--Klaas Bil
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I will try and make one out of an old tacoed rim, and see how long it
lasts. As long as the hub is still straight it'll be able to fit on the
brearing housings. One question. How did you bend the frame so thatthe
bearing housings were straight, IE what tools did you use???

Thanks,
Eric

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Roger started off the bending of the frame by squashing it in the vice,
but it wasn't enough & I beat it about with blocks of wood in a
haphazard sort of way. I thought after I had done it that I might have
got on better if I had wired the bearing holders the right distance
apart and then put a car jack between the forks. The bearing holders
have ended up at a slight angle but because they are a fairly loose fit
any way this doesn’t seem to be a problem.

/\/\

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mike.hinson - Unicyclist since Nov 2000

"I have to overcome a 'stress hill' when tightening the nuts, but once
installed they sit in a 'stress valley'. "

--Klaas Bil
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Thanks much. Here is how I plan on doing it. Secure the bearing holders,
and put the part i want to bend on a block so the other side is hanging
off. Then beat the [censored] out of the frame to bend it until It seems good,
repeat on the other side, until they both are somewhat symmetrical, and
then check to make sure the wheel can fit, and still have bearings in
the right place, I hope the frame is large enough though to hold the
wheel without rubbing onto the under side of the crown.

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(Klaas Bil) said:

You say that the wheel is flat and hence should be quite strong. That
may be but if you hop on it, you still put sideways force on it even
if you're hopping straight. So the net effect is that you can more
easily damage the wheel from hopping/dropping.

Not so much. In order to hop, you'd have to lean the unicycle to the
side far enough to get the tire under the center of mass. Hopping
from that position wouldn't add a sideways load. Of course, the spoke
angles vary in a wheel built this way, so the wheel will be weaker
where spokes are closer to vertical.

Ken

Ken Cline said:

Not so much. In order to hop, you'd have to lean the unicycle to
the
side far enough to get the tire under the center of mass. Hopping
from that position wouldn't add a sideways load. Of course, the
spoke
angles vary in a wheel built this way, so the wheel will be weaker
where spokes are closer to vertical.

The picture may make my point more clear (sorry for posting a forum
picture for a fellow newsgroup user). The centre of mass (M) is
vertically above the tyre contact point, but there is still a lateral
load on the wheel.

Klaas Bil

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