A Cycling & bikes forum. CycleBanter.com

Go Back   Home » CycleBanter.com forum » rec.bicycles » Unicycling
Site Map Home Register Authors List Search Today's Posts Mark Forums Read Web Partners

Another possible guni hub



 
 
Thread Tools Display Modes
  #1  
Old September 18th 06, 07:20 PM posted to rec.sport.unicycling
unisk8r
external usenet poster
 
Posts: 353
Default Another possible guni hub


Fallbrook Technology will manufacture (and has already licensed to
Ellsworth Cycles) this new Constant Velocity Transmission hub, named
NuVinci. It has continuous ratios from 1:1 to 3.5:1, but is made as a
normal freewheeling bike hub. Maybe they could be persuaded to make a
fixie version?
http://www.fallbrooktech.com/NuVinci.asp


--
unisk8r
------------------------------------------------------------------------
unisk8r's Profile: http://www.unicyclist.com/profile/4660
View this thread: http://www.unicyclist.com/thread/53362

Ads
  #2  
Old September 19th 06, 01:40 AM posted to rec.sport.unicycling
trials_uni
external usenet poster
 
Posts: 622
Default Another possible guni hub


3.5:1!!!!!!! Holy cow...That would make a 29er into a 90" wheel...Thats
nuts in my opinion...But hey what do i kno about such things as this.


--
trials_uni

TRIALS 4 LIFE !
'Check Out The Newbie Guide' (http://tinyurl.com/99yez)
'And the Spline Maintenance Guide!'
(http://www.unicyclist.com/forums/showthread.php?t=52195)

*Caution-I may have no idea what im talking about*
------------------------------------------------------------------------
trials_uni's Profile: http://www.unicyclist.com/profile/10953
View this thread: http://www.unicyclist.com/thread/53362

  #3  
Old September 19th 06, 02:34 AM posted to rec.sport.unicycling
unicyclepa
external usenet poster
 
Posts: 276
Default Another possible guni hub


i saw that in Moution Bike Action and was thinking the same thing


--
unicyclepa

www.unicyclepa.com
we suck
but its all good
team YAMS member in your sig or title and say
------------------------------------------------------------------------
unicyclepa's Profile: http://www.unicyclist.com/profile/9246
View this thread: http://www.unicyclist.com/thread/53362

  #4  
Old September 19th 06, 04:50 AM posted to rec.sport.unicycling
onetrack
external usenet poster
 
Posts: 181
Default Another possible guni hub


does that design gradually increase the ratio as you pedal faster? Not
sure that I am exactly a fan of that.


--
onetrack

"People over here have a dangerous habit of adding quotes to signature
lines."
-Klaas Bil

I pulled a sick trey varial hickflip over an 8 set yesterday, but
unfortunately it was supposed to be seat in to seat out. I've named it
the dioflip
------------------------------------------------------------------------
onetrack's Profile: http://www.unicyclist.com/profile/6374
View this thread: http://www.unicyclist.com/thread/53362

  #5  
Old January 15th 09, 08:25 PM posted to rec.sport.unicycling
kington99
external usenet poster
 
Posts: 1,499
Default Another possible guni hub


if anyone's interested I have a Nuvinci hub sitting on my desk
currently. It will never make it as a unicycle hub in anything like its
current guise. The ratchet is easily removed but the hub won't sustain
large reverse torques, so will slip when you try and slow down. Also
this thing is heavy like you wouldn't believe


--
kington99

Dave

- what a thoroughly post-modern subversion of the cycling genre -
------------------------------------------------------------------------
kington99's Profile: http://www.unicyclist.com/profile/9417
View this thread: http://www.unicyclist.com/thread/53362


Posted Via Usenet.com Premium Usenet Newsgroup Services
----------------------------------------------------------
http://www.usenet.com
  #6  
Old January 15th 09, 08:28 PM posted to rec.sport.unicycling
eenwieler-sander
external usenet poster
 
Posts: 61
Default Another possible guni hub


kington99;1170981 wrote:
if anyone's interested I have a Nuvinci hub sitting on my desk
currently. It will never make it as a unicycle hub in anything like its
current guise. The ratchet is easily removed but the hub won't sustain
large reverse torques, so will slip when you try and slow down. Also
this thing is heavy like you wouldn't believe




the last part looks strange to me because i have tried a bike with the
nuvinci hub and i could stand on the pedals and it dit not slip

although when i put force on the pedals you can not shift

and indeed this hub is to heavy


--
eenwieler-sander
------------------------------------------------------------------------
eenwieler-sander's Profile: http://www.unicyclist.com/profile/10956
View this thread: http://www.unicyclist.com/thread/53362


Posted Via Usenet.com Premium Usenet Newsgroup Services
----------------------------------------------------------
http://www.usenet.com
  #7  
Old January 15th 09, 08:37 PM posted to rec.sport.unicycling
harper
external usenet poster
 
Posts: 706
Default Another possible guni hub


eenwieler-sander;1170983 wrote:
the last part looks strange to me because i have tried a bike with the
nuvinci hub and i could stand on the pedals and it dit not slip





kington99 specified -reverse- torque. The CV hub is probably designed
so that the frictional force is increased with forward torque (like a
rotating lock down) and decreased with reverse torque. Hence, you can
stand on the pedals and it won't slip and you can reverse the direction
and get it to slip by hand.

Sturmey Archer and some other free-wheeling geared hubs have a
directional design, also. Their gear teeth are more like ratchets and
will easily lock in the forward direction but slip in the reverse
direction.


--
harper

-Greg Harper

*jc is the only main man. there can be no other.*

"Natural logs are what you ride on a Mun'e'." - kevinalexandersmith
------------------------------------------------------------------------
harper's Profile: http://www.unicyclist.com/profile/426
View this thread: http://www.unicyclist.com/thread/53362


Posted Via Usenet.com Premium Usenet Newsgroup Services
----------------------------------------------------------
http://www.usenet.com
  #8  
Old January 15th 09, 10:12 PM posted to rec.sport.unicycling
kington99
external usenet poster
 
Posts: 1,499
Default Another possible guni hub


harper;1170989 wrote:
kington99 specified -reverse- torque. The CV hub is probably designed so
that the frictional force is increased with forward torque (like a
rotating lock down) and decreased with reverse torque. Hence, you can
stand on the pedals and it won't slip and you can reverse the direction
and get it to slip by hand.

Sturmey Archer and some other free-wheeling geared hubs have a
directional design, also. Their gear teeth are more like ratchets and
will easily lock in the forward direction but slip in the reverse
direction.




indeedy, as far as i understand the hub works by the properties of a
non-newtonian fluid, it effectively goes solid when trapped between the
ball and the cone. Presumable when running in reverse the fluid isn't
subjected to suitable pressures to cause this effect, allowing it to
slip. Haven't tried this myself but it is the accepted wisdom of other
car racers who use them, it;s significant as it throws out the
possibility of regen braking


--
kington99

Dave

- what a thoroughly post-modern subversion of the cycling genre -
------------------------------------------------------------------------
kington99's Profile: http://www.unicyclist.com/profile/9417
View this thread: http://www.unicyclist.com/thread/53362


Posted Via Usenet.com Premium Usenet Newsgroup Services
----------------------------------------------------------
http://www.usenet.com
  #9  
Old January 15th 09, 10:38 PM posted to rec.sport.unicycling
eenwieler-sander
external usenet poster
 
Posts: 61
Default Another possible guni hub


harper;1170989 wrote:
kington99 specified -reverse- torque. The CV hub is probably designed so
that the frictional force is increased with forward torque (like a
rotating lock down) and decreased with reverse torque. Hence, you can
stand on the pedals and it won't slip and you can reverse the direction
and get it to slip by hand.

Sturmey Archer and some other free-wheeling geared hubs have a
directional design, also. Their gear teeth are more like ratchets and
will easily lock in the forward direction but slip in the reverse
direction.




oke i did not read that part good i think englich is alsow not my first

i can see how it would slip because of the no torgue at the point you
are starting to push backwards.

i know how the other geared hubs work (working on the saterday;s at my
lbs)


--
eenwieler-sander
------------------------------------------------------------------------
eenwieler-sander's Profile: http://www.unicyclist.com/profile/10956
View this thread: http://www.unicyclist.com/thread/53362


Posted Via Usenet.com Premium Usenet Newsgroup Services
----------------------------------------------------------
http://www.usenet.com
  #10  
Old January 15th 09, 11:33 PM posted to rec.sport.unicycling
dangerdog
external usenet poster
 
Posts: 139
Default Another possible guni hub


I am keen on the potential of the duvinci hub for unicycle use,however
it would require a bit of re-engineering in order to be suitable.The
standard hub is listed as having a gear range of 0.5 to 1 ratio through
to 1.75 to 1 ratio,this range of gearing would be very suitable for a
unicycle.An example with a 26" wheel would be an effective range of 13"
through to 45.5" I think that would cover almost all gearing
requirements.

I emailed about 6 months ago and they said they have no intention at
this stage to make a unicycle hub.

The reply

John,
We appreciate your enthusiasm for the NuVinci CVP. At this time, we
don't have plans to adapt the hub for use in a unicycle. Maybe
someday...

Regards,
R. Scott Harris
Director - Customer Services
ATC
9901 West Reno
Oklahoma City, OK 73127
Ph: 405-577-9925
Fax: 405-577-9922
Cell: 405-229-2507

www.atcnuvinci.com


--
dangerdog

once I was young and stupid....that was some time ago

video http://au.youtube.com/watch?v=gDderUScDJQ
------------------------------------------------------------------------
dangerdog's Profile: http://www.unicyclist.com/profile/16398
View this thread: http://www.unicyclist.com/thread/53362


Posted Via Usenet.com Premium Usenet Newsgroup Services
----------------------------------------------------------
http://www.usenet.com
 




Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

vB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Forum Jump

Similar Threads
Thread Thread Starter Forum Replies Last Post
GUNI innertube help needed asap David_Stone Unicycling 2 July 17th 06 03:42 PM
Guni Giraffe... tomtrevor Unicycling 7 June 12th 06 02:42 PM
Problem with my new Schlumpf guni hub? David_Stone Unicycling 23 April 4th 06 08:06 PM
1st Century on a guni (long) David_Stone Unicycling 0 September 12th 05 07:27 AM
GUNI is here!!! David_Stone Unicycling 78 September 7th 05 10:24 PM


All times are GMT +1. The time now is 05:30 AM.


Powered by vBulletin® Version 3.6.4
Copyright ©2000 - 2017, Jelsoft Enterprises Ltd.
Copyright 2004-2017 CycleBanter.com.
The comments are property of their posters.