Builder's Spotlight The Paceline Forum Builder's Spotlight


Go Back   The Paceline Forum > Builder Spotlights

Reply
 
Thread Tools Display Modes
  #1261  
Old 01-18-2019, 04:49 AM
weisan's Avatar
weisan weisan is offline
ZhugeLiang
 
Join Date: Dec 2003
Location: Back in Austin, Texas
Posts: 12,904
Quote:
Originally Posted by PaMtbRider View Post
Dave, the idea of terraplane stays on a hardtail mountain bike was mentioned in another thread. Is this something you ever considered or looked into? I'm guessing a high volume mountain bike tire would lessen the benefits of the stays in that application.
i would imagine it would require a whole different series of tests and tweaking the design to meet the demands of mtb riding which is so different from road riding.
__________________
🏻*
Reply With Quote
  #1262  
Old 01-18-2019, 09:06 AM
David Kirk's Avatar
David Kirk David Kirk is offline
Senior Member
 
Join Date: Dec 2003
Location: Bozeman MT
Posts: 6,999
Quote:
Originally Posted by PaMtbRider View Post
Dave, the idea of terraplane stays on a hardtail mountain bike was mentioned in another thread. Is this something you ever considered or looked into? I'm guessing a high volume mountain bike tire would lessen the benefits of the stays in that application.
Yes - I've done work in this direction and your guess is spot on. The tall soft tire largely negates any benefit of the stays.

Think of it this way - the tire is a soft air spring and the curved stays are a stiff spring and when you put the stiff spring on top of the soft spring and push down you predictably see the soft spring deflect before the stiff spring moves. This means that the stays would need to be MUCH softer (only slightly stiffer than the soft tire) for them to do the job. This isn't practical with a bent stay and even if it was it would move so much that it would need to have some damping to control its rebound.

So in the end it just doesn't make sense. The system works very well with a firmer tire and that's where it will stay.

Thanks for the question.

dave
Reply With Quote
  #1263  
Old 01-18-2019, 09:50 AM
David Kirk's Avatar
David Kirk David Kirk is offline
Senior Member
 
Join Date: Dec 2003
Location: Bozeman MT
Posts: 6,999
Part II of my interview with Patrick Brady for his podcast 'The Pull' has been made live. I hope can make time to give it a listen.

dave

http://redkiteprayer.com/2019/01/the...-kirk-part-ii/
Reply With Quote
  #1264  
Old 01-19-2019, 05:44 PM
572cv's Avatar
572cv 572cv is online now
Senior Member
 
Join Date: Mar 2009
Location: Vermont
Posts: 1,932
Hi Dave, the interview was hotly anticipated, and has already generated much interest. Thanks for taking the time to visit with “Padraig” and giving us much to chew on. Cheers!


Sent from my iPad using Tapatalk
Reply With Quote
Reply

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

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump


All times are GMT -5. The time now is 02:01 PM.


Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2019, vBulletin Solutions, Inc.