|
|
Thread Tools | Display Modes |
#1
|
|||
|
|||
Nupace continuously variable transmission internal gear hub
Anyone had any experience with these yet? www.nupace.com Anyone had a chance to see the innards? Any opinions on reliability or efficiency -- meb |
Ads |
#2
|
|||
|
|||
On Sun, 26 Sep 2004 14:13:29 +1000, meb
wrote: Anyone had any experience with these yet? www.nupace.com Anyone had a chance to see the innards? Any opinions on reliability or efficiency? Dear Meb, There was some speculation and (I think) some links to patents in this thread a few months ago: http://tinyurl.com/4pzo5 or http://groups.google.com/groups?hl=e...com%26rnum%3D1 At those prices, it may be quite a while before anyone finds out about reliability. Carl Fogel |
#3
|
|||
|
|||
Carl Fogel writes:
Anyone had any experience with these yet? www.nupace.com Anyone had a chance to see the innards? Any opinions on reliability or efficiency? There was some speculation and (I think) some links to patents in this thread a few months ago: http://tinyurl.com/4pzo5 At those prices, it may be quite a while before anyone finds out about reliability. Thanks for looking it up. This subject comes you at intervals and this design has been done in large scale, externally, on single chainwheels. It is not continuous as you can see in the drawings that show fine stepped ratchets with many pawls that trade off the load. These many ratchets articulate under load by an amount proportional to their extended engagement angle and the lowest angle. Only one pawl bears the load at any moment and it speeds up the relative rotation of the ratchet ring with respect to the core by the angle through which it changes due to the eccentricity of the core. The drawings are so crude that details are not visible other than the concept. These seem to be manual sketches rather than CAD images. I suspect that the hub would fail if a strong rider were sprint on it or climb a grade. The method has been offered a few times in response to the FAQ: http://draco.acs.uci.edu/rbfaq/FAQ/8i.3.html Jobst Brandt |
Thread Tools | |
Display Modes | |
|
|
Similar Threads | ||||
Thread | Thread Starter | Forum | Replies | Last Post |
New bicycle idea | Bob Marley | General | 49 | October 7th 04 05:20 AM |
"Continuously variable" electric transmission | Richard Schumacher | General | 16 | January 6th 04 02:33 AM |
"Continuously variable" electric transmission | Richard Schumacher | Techniques | 17 | December 22nd 03 06:46 PM |
Reliability/durability of internal gear hub? | [email protected] | Techniques | 3 | October 1st 03 12:13 AM |