HOT: Active* forum members generally gain 5% discount at starbike.com store!
Weight Weenies
* FAQ    * Search    * Trending Topics
* Login   * Register
HOME Listings Articles FAQ Contact About




Post new topic Reply to topic  [ 9 posts ] 
Author Message
 Post subject: wireless brakes
PostPosted: Tue Mar 27, 2012 11:20 pm 
Offline

Joined: Mon Aug 23, 2010 8:17 pm
Posts: 99
Location: near Seattle
http://whatsnext.blogs.cnn.com/2012/03/ ... pt=hp_bn11
http://www.mpi-sws.org/~vahldiek/papers/wowmom.pdf

_________________
Saura mon coeur que mon cul poise.

adapted from Rabelais


Top
 Profile  
 
 Post subject: Re: wireless brakes
PostPosted: Tue Mar 27, 2012 11:28 pm 
Offline

Joined: Thu Dec 08, 2005 12:48 am
Posts: 83
I wonder how the feedback feels (if any).


Top
 Profile  
 
 Post subject: Re: wireless brakes
Posted: Tue Mar 27, 2012 11:28 pm 


Top
  
 
 Post subject: Re: wireless brakes
PostPosted: Wed Mar 28, 2012 6:02 am 
Offline

Joined: Sun Apr 24, 2011 6:23 am
Posts: 640
Location: Melbourne, Australia
No. Not for bikes.

_________________
Slam your stem.
prendrefeu wrote:
Hating a 'drivetrain' choice on one bike vs. another is as imbecile as people getting into fist-fights at a motor race that they are not actually racing in Australia over a debate between two car companies. It really is ridiculous.


Top
 Profile  
 
 Post subject: Re: wireless brakes
PostPosted: Wed Mar 28, 2012 8:48 am 
Offline

Joined: Tue Sep 22, 2009 1:29 pm
Posts: 559
Location: UK
Wireless brakes are an interesting technical concept, but personally there is absolutely no way I would ever contemplate using them

_________________
"We live in an age when unnecessary things are our only necessities." Oscar Wilde

Pegoretti Responsorium
Parlee Z5i
Donhou Commuter


Top
 Profile  
 
 Post subject: Re: wireless brakes
PostPosted: Wed Mar 28, 2012 9:06 am 
Offline
User avatar

Joined: Sat Mar 17, 2007 10:49 am
Posts: 758
Location: Mallorca, Spain
hard to tell the pros & cons of what is vapourware but strikes me as yet another example of cycling tech offering a solution without a problem.


Top
 Profile  
 
 Post subject: wireless brakes
PostPosted: Wed Mar 28, 2012 10:39 am 
Offline

Joined: Wed Oct 07, 2009 12:25 pm
Posts: 313
Location: Jakarta, Indonesia / The Hague, Holland
Check your calendar...

_________________
2010 Guerciotti Whisper
2007 Bianchi 928L (update Sep '11)
1999 Bianchi MegaPro 25CrMo4


Top
 Profile  
 
PostPosted: Wed Mar 28, 2012 4:45 pm 
Offline

Joined: Fri Mar 26, 2010 4:24 pm
Posts: 91
These articles show that the bike industry is totally clueless. Note: I didn't say that the researchers are clueless, just the bike industry who is reporting it like this is the "next big thing" in bicycle technology.

Wireless brakes are not in themselves a foolish idea - but that doesn't mean that they are well suited to bicycles. And the researchers in these articles aren't really intending them to be used on bikes, anyway.

A little background -

Railroad trains have typically used pneumatic braking systems. But some of todays trains are very, very long, so long that there is a meaningful delay for a pneumatic control signal generated at the front of the train to reach the rear of the train. One solution is to transmit braking signals electrically, so that braking control signals generated at the front of the train will reach the rear of the train almost instantly. But running wires from the front of the train to the rear would require electromechanical connectors at every coupling between cars. Each electrical connector introduces a potential failure point (connectors and contact points can be dirty, damaged, intermitant, etc.), and the many connectors required only multipies the potential for failure. Further, every time cars are couple and decoupled introduces another opportunity for the connecting components to fail. Because the connectors would all be in series, a single connection fault will prevent control signals from reaching the rear of the train.

A possible solution would be to replace the electromechanical connectors between cars with wireless signals. Wireless signals have their own reliability issues, but perhaps less than a multitude of electromechanical connectors. To find out, the researchers needed to proof of concept test. Building a testing a prototype on an actual railroad train is costly and time consuming (not to mention the safety issues), so they decided to start with a smaller, simpler system. They chose as their first, small scale test, to use a bicycle braking system. They even admit in the published paper that they didn't expect a wireless brake to be ultimately practical for bicycles:

"This project was originally conceived as the mad bike
project, and there is some craziness in this idea after all.
However we think that it is a very good case to study
the principal possibilities and limitations of wireless control
without going to excessive infrastructure costs. Indeed, our
investigations allow us to discriminate between different
options to solve this and similar problems with different
dependability guarantees."

The foolishness started when the bicycle industry heard the idea, and thought that it really was meant for bicycles.


Top
 Profile  
 
 Post subject: Re: wireless brakes
PostPosted: Wed Mar 28, 2012 4:50 pm 
Offline

Joined: Sun Dec 17, 2006 12:02 pm
Posts: 944
Location: EU
So the planes fly by electronic wires.

Cars have electronically controled brakes.

But it seems no one here would try electronic brakes on their bikes.

Are you serious guys?

_________________
A light bike does replace good fitness.


Top
 Profile  
 
 Post subject: Re: wireless brakes
Posted: Wed Mar 28, 2012 4:50 pm 


Top
  
 
 Post subject: Re: wireless brakes
PostPosted: Wed Mar 28, 2012 4:57 pm 
Offline
User avatar

Joined: Sat Mar 17, 2012 8:48 pm
Posts: 37
Location: Los Angeles
record wrote:
So the planes fly by electronic wires.

Cars have electronically controled brakes.

But it seems no one here would try electronic brakes on their bikes.

Are you serious guys?


Airplanes cost millions of dollars and have multi-point inspections after every flight.

And newer cars have electrical systems incorporated into their brake systems, but they are still mechanical and use fluid: nothing is wireless.

I would not trust my brakes with a battery, just so that I could get rid of my brake lines.


Top
 Profile  
 
Display posts from previous:  Sort by  
Post new topic Reply to topic  [ 9 posts ] 


Who is online

Users browsing this forum: HakeemT, MarkGiardini, TiG and 8 guests


You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot edit your posts in this forum
You cannot delete your posts in this forum
You cannot post attachments in this forum

Search for:
Jump to:  

   Similar Topics   Author   Replies   Views   Last post 
There are no new unread posts for this topic. wireless di2

in Road

coppercook62

2

440

Fri Jan 17, 2014 7:52 am

coppercook62 View the latest post

There are no new unread posts for this topic. Converting Wired into Wireless SRM

in Road

Stefano

4

423

Sat Feb 08, 2014 10:14 am

micky View the latest post

There are no new unread posts for this topic. SRM Power Meter. Cannondale Hollowgram Si-Sl wireless FS

in For sale - Pictures are mandatory 22-3-13

airwise

0

347

Sun Feb 23, 2014 5:49 pm

airwise View the latest post

There are no new unread posts for this topic. SRM Power Meter. Cannondale Hollowgram Si-Sl wireless FS

in For sale - Pictures are mandatory 22-3-13

airwise

0

288

Sun Mar 30, 2014 8:59 am

airwise View the latest post

There are no new unread posts for this topic. Attachment(s) SRM wireless power meter FSA K-Force Light 53/39 175mm PM7

in For sale - Pictures are mandatory 22-3-13

Thirstyman

0

159

Thu Apr 17, 2014 8:28 am

Thirstyman View the latest post


It is currently Thu Apr 24, 2014 3:24 am

All times are UTC + 1 hour




Advertising   –  FAQ   –  Contact   –  Convert   –  About

© Weight Weenies 2000-2013
hosted by starbike.com


How to get rid of these ads? Just register!


Powered by phpBB