Guni Suspension, New plans

oh! oops, also, the hub will be mounted to a berring inside the frame,
and the berring will have some sorta of mounting bracket to the spring,
i might also have 2 springs on either side. Its really good i think,
how bout anyone else?

Edit: instead of spring, i might just put small shocks inside, probably
bike shocks or something, i need to contain it very small though

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unibikeling

unibikeling said:

chrome said:

Difficult to mount, but a fun ride once you get her going....

-if only my unicycle was that dirty

'lol...' (http://www.internetisseriousbusiness.com)

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It looks as if the frame slides as shown will allow the cogs to travel
with respect to each other. This of course makes chain tensioning
impossible. The driving cogs and the driven cogs must be on the same
side of the spring. Maybe I have misinterpreted your sketch.

Edit: Oh, I see your chain tensioner. This would have to be one REALLY
STIFF puppy. The force that you exert with your legs is enormous. This
is why derailleur systems don't work on unicycles. Think about moving
your slide system and keeping the cogs all on the same side of the
slide split. This will greatly simplify your design.

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The chain tensioner isn't going to work. It is impossible to make a
strong and adjustable chain tensioner that will work on a fixed gear
bike/unicycle.

Adjustable chain tensioners don't work on fixed gear bikes. The only
way to do it is to overengineer the thing and weld it directly to the
bike frame. Any adjustability in it would have to be locked in place
with strong bolts. There is no way to do it with springs and auto
adjustment. There is just too much force on a fixed gear chain and the
chain gets force in both directions.

A derailleur works on a standard 10 speed style bike because the chain
only gets force in one direction. The bottom section of chain is
always slack. Not so on a fixed gear bike or a guni.

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What is your right crank attached to?

It might work better to have your gearing horizontal instead of
vertical and have the wheel traveling in a bit of an ark to maintain
the same tension on the chain at all times. Of-course you would get
some wheel movement when it goes up and down, but with the chain
tensioner in there you would get it anyway, and it would be less sloppy
when putting back pressure on the pedals (you won't be compressing the
chain tensioner).

To figure out what would work well think about each component and what
forces would go through each of them. Make sure everything has an equal
and opposite force and you wont be surprised by a piece breaking
when/if you build your design.

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ok thanks guys, Ive found a few mistakes myself, such as frame sizing. I
think at a possible point, it might work, i might be able to put a
shock on the tensioner. I think i may need to post a sideveiw of the
frame

--
unibikeling

unibikeling said:

chrome said:

Difficult to mount, but a fun ride once you get her going....

-if only my unicycle was that dirty

'lol...' (http://www.internetisseriousbusiness.com)

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yeah, thanks guys once again, it took me a bit just to think of the
right side, Considering i have access to a full metal shop, i might try
and design something, i might just put the system on both sides, or
make it like a girraffe and put another hub on the seatpost area, and
then make that fit its way onto both sides, such as a giraffe, like a
migdet girraffe on steroids

--
unibikeling

unibikeling said:

chrome said:

Difficult to mount, but a fun ride once you get her going....

-if only my unicycle was that dirty

'lol...' (http://www.internetisseriousbusiness.com)

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but then again, its the whole concept of suspension, and myself, i cant
think of anything better that will suspension EVERYTHING except the
tire itself. I think it might work just to make it like super wide and
put the whole gear system on both sides

--
unibikeling

unibikeling said:

chrome said:

Difficult to mount, but a fun ride once you get her going....

-if only my unicycle was that dirty

'lol...' (http://www.internetisseriousbusiness.com)

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unibikeling said:

but then again, its the whole concept of suspension, and myself, i cant
think of anything better that will suspension EVERYTHING except the
tire itself.

As drawn, the axle remains fixed to the wheel so everything does not
float except the wheel as you say. From the standpoint of suspension
your system does the same thing as a suspension seat post but with
increased complexity. The saddle moves with respect to the wheel and
pedals, the telescoping just takes place in a different location.

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Ah, I thought that you had the cranks attached to the frame and the
wheel on a shorter axle, that is why I asked about the right side.

If you want some good ideas you should 'check out this thread'
(http://www.unicyclist.com/forums/showthread.php?t=32510). It has lots
of good discussion about different designs and their strong
points/weaknesses.

A midget suspension giraffe on steroids sounds interesting though🙂

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kay, i'll draw up some plans tomorrow after school i guess. As you can
see, my handwriting sucks. And that drawing was much better looking
before my printer decided to make things too light, for i compensated

--
unibikeling

unibikeling said:

chrome said:

Difficult to mount, but a fun ride once you get her going....

-if only my unicycle was that dirty

'lol...' (http://www.internetisseriousbusiness.com)

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if you do get it to work your pant leg *will* get caught in your chain
and you will fall. i know that happens to me all the time

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nickels.

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This thread is full of fail.

Unicycles don't need suspension, get out and ride.

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Borgschulze said:

This thread is full of fail.

Unicycles don't need suspension, get out and ride.

It'd prob help w/ big drops though. Everything else it'd be
unnessesary, a 3" tire works great, possibly better than suspension.

...but then look what happened w/ DH bikes. They started w/ really fat
tires, and now I don't think any of the pro DH racers ever use anything
wider than a 2.3", thanks to tubeless tires and improved suspension
desighns.

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Show of hands who lands on their seat on big drops?

Suspension on a bike is there because they have two wheels, which
causes the bike to buck forward and backward, thus suspension helps
that.

On a Unicycle, your legs -are- suspension.

If you're landing on the seat on big drops, you either have the seat
too high, or you need to get some more leg muscle going on.

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Borgschulze said:

Show of hands who lands on their seat on big drops?

Suspension on a bike is there because they have two wheels, which
causes the bike to buck forward and backward, thus suspension helps
that.

On a Unicycle, your legs -are- suspension.

If you're landing on the seat on big drops, you either have the seat
too high, or you need to get some more leg muscle going on.

I do when I mess up, which only happens once im around 7-8 feet high.

Anything smaller, and most street stuff I land with the legs first, and
lower myself into the seat afterwards. I tried to explain that I do
this, and how it helps with plastic bases lasting a lot longer, but I
got ganged up on saying I was wrong. lol. Funny people.

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Borgschulze said:

Show of hands who lands on their seat on big drops?

Show of hands if you don't "get" what this thread is about? Thanks Borg.
If you don't want/need suspension go away. This is more an engineering
problem and is obviously not intended to improve general unicycling.
He's already got a chain on there for gosh sakes!

Suspension is not for drops and extreme terrain, unless the rider can
be suspended separately from the wheel. But a nice, lite suspension
system can do wonders for road riding or light MUni, when you're
seated. If the intention here is to suspend the wheel separately from
the pedals, that's still a problem that hasn't been solved for
"standard" unicycles. Definitely worth pursuing.

If you're not trying to suspend the wheel separately from the pedals,
I'll have to go along with Harper on recommending a suspension
seatpost. Even if you want to build your own, your results would be
useful for any unicycle and might still do just as much as what you're
working on now at much less weight and complexity. I've used suspension
posts on two of my unicycles (both MUnis) and they've worked great.

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Ok, have fun with your silly suspension ideas. 🙄

Cmon' Jerrick, let's get out of here, these senile men are rambling
again. 🙁

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well, im back on peoples lol. Yes, Thanks John for supporting me a bit.
Ive already had a bunch of people ask me what the point is. The point
in itself is to break slightly new ground. If someone gets an idea out
there, that can work, its bound to be able to be made smaller and
lighter. Right now my system that i was working on has doubled in size
practically... lol... i'm going to try and get it as small as i can
when i do get to the metal shop and piece things together. When im done
im going to spraypaint it neon green (my best friends idea lol)

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unibikeling

unibikeling said:

chrome said:

Difficult to mount, but a fun ride once you get her going....

-if only my unicycle was that dirty

'lol...' (http://www.internetisseriousbusiness.com)

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unibikeling said:

The point in itself is to break slightly new ground.

Those who don't understand this will give no constructive input, will
experiment with nothing different, and will never see the fruits of
"senile men" rambling, even in the field of unicycling and even in the
not so far past. How long ago was it that the trials unicycle pictured
in Borgschulze's avatar or anything even similar to it did not exist
anywhere?

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