 |
 | Home | Contact Us | FAQ | Search & Site Map | Link to Us |
 | Sign In | Join | Other 45 Sites in Network |
| HomeDiscussion Groups General ModelsRailroadsRocketsRadio Controlled Air ModelsHelicoptersLand ModelsWater ModelsModelGeeks.com Contact UsLink To UsSearch & Site Map |
Model Forum / Radio Controlled / Land Models / April 2007I would like to see this incorporated into RC diff's
Check out this vid on youtube and tell me this would not be cool on a savage t-maxx or for what i would like it for a touring car. http://www.youtube.com/watch?v=kVPjhmTThPo > Check out this vid on youtube and tell me this would not be cool on a > savage t-maxx or for what i would like it for a touring car.http://www.youtube.com/watch?v=kVPjhmTThPo >From what I gather this would be the diff and the transmission both incorporated into the diff location.it would cut down weight,space and could be run right off the clutch or flywheel itself? I don't see how it would work as a diff and trans both, based on the bicycle CVT. One side is an input while the other is an output. You would still have to have other gears for the diff, which would determine the ultimate ratio. This seems to me to basically work like clutch shoes to a clutch bell. (loose to tight) (variable speed). Also, if incorporated into RC and left as a variable/adjustable hub, there would have to be some way to move the inner ring to adjust it. (as the bike obviously uses some sort of cable to the handle grip) Interesting though. > > Check out this vid on youtube and tell me this would not be cool on a > > savage t-maxx or for what i would like it for a touring car.http://www.youtube.com/watch?v=kVPjhmTThPo > > >From what I gather this would be the diff and the transmission both > incorporated into the diff location.it would cut down weight,space and > could be run right off the clutch or flywheel itself? > I don't see how it would work as a diff and trans both, based on the bicycle > CVT. [quoted text clipped - 7 lines] > (as the bike obviously uses some sort of cable to the handle grip) > Interesting though. That's not how it works, It does not work like a clutch, it is truely a variable-ratio system. The key is where each of the wheels contact the ball in relation to the axis of the ball itself. At the extremes, one contacts close to the axis of the ball, and the other contacts near the ball's "equator". It could be made into a combination with a differential, it would just have to have one output shaft of the Diff go THROUGH the entire, with the transmission revolving around the through-shaft. Mechanically there is nothing preventing that from happening. That would end up being an assembly of about a gazillion different parts, it would get expensive pretty quickly. That being said, it would be hard for this to work automatically, there would have to be some mechanism to do the actual shifting. I would imagine if one could reliably measure the RPMs of the motor and have something operate a servo based on that, and have the servo adjust the system. I do question however, how much torque this would be able to handle before the rings start slipping on the balls, no matter what scale it is. > That being said, it would be hard for this to work automatically, > there would have to be some mechanism to do the actual shifting. I [quoted text clipped - 3 lines] > be able to handle before the rings start slipping on the balls, no > matter what scale it is. I cant remember who or when but a CVT has been used on an F1 car in testing (not allowed in racing, it was a proto) and it dealt with them fine. Could well have been a different design but AFAIK all CVT designs use friction to transmit torque? > > That being said, it would be hard for this to work automatically, > > there would have to be some mechanism to do the actual shifting. I [quoted text clipped - 8 lines] > well have been a different design but AFAIK all CVT designs use friction to > transmit torque? Maybe true, but consider the amount of money put in to one of those cars, it's not surprising. My doubts were in this specific design, as I know they work elsewhere. Ford currently has one in the All-Wheel- Drive version of the 500, as does Can-Am in their DS250 (http:// www.brp.com/en-US/Products/CanAm/Showroom/DS250.htm) The Ford version is a steel-belt design I believe, I've seen a cutaway type of picture of it, probably in the dealer's brochure for the 500. Wasn't enough info to see how it works though. I believe (possibly quite wrongly) that Can-Am's design is a belt-and-pully type, much like those on snowmachines and variable-speed milling machines / drill presses, no new technology there. |
Reply to this Message |
 Sign In
 Join
 My Latest Posts My Monitored Threads My Blog My Photo Gallery My Profile My Homepage Start New Thread Enable EMail Alerts Rate this Thread
|
©2008 Advenet LLC Privacy Policy - Terms of Use
This website includes both content owned or controlled by Advenet as well as content owned or controlled by third parties.