Re: making geared uni.

UniBiker. Do a search. Jeff Baker (UniBiker) had a multispeed converted
bicycle with a variety of drag brakes. It was a cool machine.

'Here is his gallery.' (http://gallery.unicyclist.com/albun01)

'Here is a time trial thread.' (http://tinyurl.com/7hb65)

--
harper - HOT!

-Greg Harper

B L U E S H I F T

*there is no main man other than jc.*

"You guys aren't thinking this through. Hey, where's your other... BANG.
" - Brian MacKenzie
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ooh... it's nice, but that's not what i was aiming for...

i was hoping for a more erect frame, like an actual giraffe... not so
much that kinda thing....

thanks though....

--
abbabibble - uhh...

Cheers,
Mat.
-----------------------
"1% of the people on the planet can ride a uni. The other 99% can only
wonder why we would do it."

-someone on this forum, and onewheeljoe. (unknown person, please PM me
if you said this, so you can get credit for this great quote.)

"maxis: STOP. GRAMMAR TIME!" ---fcwegnm0b

--"It's not difficult, but it is there and has to be done"

--"[just]respond with a casual bidigital salute[!]"

--Mikefule

"It done killed me dead, I tell ya whot!"
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abbabibble's Profile: http://www.unicyclist.com/profile/10751
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now i have another question.

IF i made this from a freewheeling gear, i hear it isn't possible to
shift gears on the go. If this is not possible, it is no problem, i just
want to know whether i should keep the shifter attached or not.

i have a few designs which i will post when i can fix my drawing
program.

--
abbabibble - uhh...

Cheers,
Mat.
-----------------------
"1% of the people on the planet can ride a uni. The other 99% can only
wonder why we would do it."

-someone on this forum, and onewheeljoe. (unknown person, please PM me
if you said this, so you can get credit for this great quote.)

"maxis: STOP. GRAMMAR TIME!" ---fcwegnm0b

--"It's not difficult, but it is there and has to be done"

--"[just]respond with a casual bidigital salute[!]"

--Mikefule

"It done killed me dead, I tell ya whot!"
------------------------------------------------------------------------
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You're going to have to do some thinking and experimentation if you want
to make a chain drive unicycle that can be shifted to different gears.

The chain tensioner thing on the derailleur is a jockey pulley
assembly. It's the spring loaded arm that takes the slack in the
chain. It can only take chain tension going in one direction. If you
try to pedal backwards you'll just end up pulling up all the slack in
the chain instead of actually driving the wheel.

A fix is to use two sets of cogs and two derailleurs. One on each side
of the wheel. Each facing the opposite direction. One will be in
tension when you are pedaling forwards and the other will be in tension
when you are pedaling backwards. You'll be able to pedal forwards and
backwards and be able to control the unicycle. It will be very tricky
to do and require some MacGyver skills. It will require two chains
(one on each side of the wheel). Each crank will need a chainwheel.

Somewhere on the web I saw a tricycle or some other custom contraption
that used two derailleurs and two freewheel cogsets like that to make a
fixed gear shiftable bike/trike/HPV. Wish I could dig up the picture.
I can't find it now. Oh well. Maybe that'll be enough to get you
thinking.

--
john_childs

john_childs (att) hotmail (dott) com
Gallery: http://gallery.unicyclist.com/john_childs
'Unicycling Bookmark List' (http://backcountry.unicyclist.com/) ::
'World Clock' (http://tinyurl.com/a99y3) :: 'Click Me'
(http://tinyurl.com/7lvbu)
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huh...

well. i'll think on that, and yes, like many of you out there, MacGyver
is my idol. seriously. So i'll do my best for that... i might just end
up shortening the chain though, and driving the wheel directly with no
derailleur.
by the way, if i don't use the derailleur, i want to know what gears i
should use. i'm thinking the big one or middle one up front, and the
biggest one or the second one in back.

--
abbabibble

Cheers,
Mat.
-----------------------
"1% of the people on the planet can ride a uni. The other 99% can only
wonder why we would do it."

-someone on this forum, and onewheeljoe. (unknown person, please PM me
if you said this, so you can get credit for this great quote.)

"maxis: STOP. GRAMMAR TIME!" ---fcwegnm0b

--"It's not difficult, but it is there and has to be done"

--"[just]respond with a casual bidigital salute[!]"

--Mikefule

"It done killed me dead, I tell ya whot!"
------------------------------------------------------------------------
abbabibble's Profile: http://www.unicyclist.com/profile/10751
View this thread: http://www.unicyclist.com/thread/43632

I HAVE
!!! well, kind of... i have to do some reinforcement in places, and get
a new chain, but it looks great for my first home made giraffe deal.
also, i came out of this with not one, but TWO great contraptions.

Construction pics:

Before:
[image: http://img.photobucket.com/albums/v493/abbabibble/nishiki.jpg]

After:
[image:
http://img.photobucket.com/albums/v493/abbabibble/disassemble.jpg]

--
abbabibble

Cheers,
Mat.
-----------------------
"1% of the people on the planet can ride a uni. The other 99% can only
wonder why we would do it."

-someone on this forum, and onewheeljoe. (unknown person, please PM me
if you said this, so you can get credit for this great quote.)

"maxis: STOP. GRAMMAR TIME!" ---fcwegnm0b

--"It's not difficult, but it is there and has to be done"

--"[just]respond with a casual bidigital salute[!]"

--Mikefule

"It done killed me dead, I tell ya whot!"
------------------------------------------------------------------------
abbabibble's Profile: http://www.unicyclist.com/profile/10751
View this thread: http://www.unicyclist.com/thread/43632

General Layout plan:
[image:
http://img.photobucket.com/albums/v493/abbabibble/generallayout.jpg]

Construction:
[image:
http://img.photobucket.com/albums/v493/abbabibble/construction.jpg]

Semi Finished Product:
[image:
http://img.photobucket.com/albums/v493/abbabibble/senifinsihed.jpg]

--
abbabibble

Cheers,
Mat.
-----------------------
"1% of the people on the planet can ride a uni. The other 99% can only
wonder why we would do it."

-someone on this forum, and onewheeljoe. (unknown person, please PM me
if you said this, so you can get credit for this great quote.)

"maxis: STOP. GRAMMAR TIME!" ---fcwegnm0b

--"It's not difficult, but it is there and has to be done"

--"[just]respond with a casual bidigital salute[!]"

--Mikefule

"It done killed me dead, I tell ya whot!"
------------------------------------------------------------------------
abbabibble's Profile: http://www.unicyclist.com/profile/10751
View this thread: http://www.unicyclist.com/thread/43632

and, the other product that came out, because i refuse to throw away
anything that could be a potential awesome contraption. I likes to call
it

the * S . M . D *

[image: http://img.photobucket.com/albums/v493/abbabibble/SMD.jpg]
[image: http://img.photobucket.com/albums/v493/abbabibble/ride.jpg]

it is so much harder than a BC wheel, i think... but someone who can
ride one has to tell me when they get a chance to try this.

--
abbabibble

Cheers,
Mat.
-----------------------
"1% of the people on the planet can ride a uni. The other 99% can only
wonder why we would do it."

-someone on this forum, and onewheeljoe. (unknown person, please PM me
if you said this, so you can get credit for this great quote.)

"maxis: STOP. GRAMMAR TIME!" ---fcwegnm0b

--"It's not difficult, but it is there and has to be done"

--"[just]respond with a casual bidigital salute[!]"

--Mikefule

"It done killed me dead, I tell ya whot!"
------------------------------------------------------------------------
abbabibble's Profile: http://www.unicyclist.com/profile/10751
View this thread: http://www.unicyclist.com/thread/43632

I think you need to do a little maths to decide which chain wheel to
use, that wheel looks like a 26" and even using the smallest top gear
and the largest bottom gear you'll still be getting atleast 2:1 ratio
by the look of it (count the teeth to confirm) So that's an effective
52", which will be very hard to ride. Do you have nay pegs or drop
brackets you could fit on the axle of the S.M.D to place your feet on?
It would be interesting to see how that rides.

--
kington99

Dave

- what a thoroughly post-modern subversion of the cycling genre -
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abbabibble said:

and, the other product that came out, because i refuse to throw away
anything that could be a potential awesome contraption. I likes to call
it

the * S . M . D *

it is so much harder than a BC wheel, i think... but someone who can
ride one has to tell me when they get a chance to try this.

It's impossible to ride. Mainly because in order for your centre of
gravity to be over the center of the wheel, your seat would need to be
close to the center of the wheel, making your steering wheel tip nearly
onto the ground.

--
Erant

Live free, prosper, and under my rule.
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To the impossiblility to ride thing, i've already coasted 4 feet or
so...

and yes, i do believe that the smallest gear on top would be quite
adaquate. I wanted the 2:1 ratio, because i thought it'd be cool to
pass a bicyclist on this thing. i think it'll work well, but i'm not
sure HOW well. And i think i'll be able to learn.

I am also going to go back to town today and get me some things i can
use as platforms. I was trying to get better last night when i fell and
loosened the weld around the joint, so today i'm going to re-weld it,
and get some pegs or platforms. i'll post pic later.

oh, i forgot to mention, the SMD has a brake, so you can slow it down
if the wheel gets too far ahead of you.

--
abbabibble

Cheers,
Mat.
-----------------------
"1% of the people on the planet can ride a uni. The other 99% can only
wonder why we would do it."

-someone on this forum, and onewheeljoe. (unknown person, please PM me
if you said this, so you can get credit for this great quote.)

"maxis: STOP. GRAMMAR TIME!" ---fcwegnm0b

--"It's not difficult, but it is there and has to be done"

--"[just]respond with a casual bidigital salute[!]"

--Mikefule

"It done killed me dead, I tell ya whot!"
------------------------------------------------------------------------
abbabibble's Profile: http://www.unicyclist.com/profile/10751
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oh and yes. the center of gravity does force me to push the bars down
WAY low when trying to stay on (i can't say riding yet because i have
yet to learn) the hard part is keeping myself in that position, and the
wheel too...

--
abbabibble

Cheers,
Mat.
-----------------------
"1% of the people on the planet can ride a uni. The other 99% can only
wonder why we would do it."

-someone on this forum, and onewheeljoe. (unknown person, please PM me
if you said this, so you can get credit for this great quote.)

"maxis: STOP. GRAMMAR TIME!" ---fcwegnm0b

--"It's not difficult, but it is there and has to be done"

--"[just]respond with a casual bidigital salute[!]"

--Mikefule

"It done killed me dead, I tell ya whot!"
------------------------------------------------------------------------
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I really like your optimistic attitude. Have lots of fun building and
trying to ride those ... things 🙂

--
goldenchicken II

Olaf Johansson

www.enhjulingsfolket.se
www.muni.se
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thanks!

i think i have that kind of attitude. It's helpful.

well, the reinforcement has started. I ripped of the seatpost holder,
and am in the process of putting scrap metal in the little triangle
area, so the seat doesn't snap off when i ride it. also, i am going
over each and every one of my previous welds to make sure they don't
break.

this thing should be completely finished by week's end.

--
abbabibble

Cheers,
Mat.
-----------------------
"1% of the people on the planet can ride a uni. The other 99% can only
wonder why we would do it."

-someone on this forum, and onewheeljoe. (unknown person, please PM me
if you said this, so you can get credit for this great quote.)

"maxis: STOP. GRAMMAR TIME!" ---fcwegnm0b

--"It's not difficult, but it is there and has to be done"

--"[just]respond with a casual bidigital salute[!]"

--Mikefule

"It done killed me dead, I tell ya whot!"
------------------------------------------------------------------------
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