Help & FAQs    Search BCF    Members    Groups    Events Calendar
Resend my activation email : Register : Log in 
BCF: Bike Chat Forums


Some odd machines

 Reply to topic
Bike Chat Forums Index -> General Bike Chat
View previous topic : View next topic  
Author Message

killa
Won't Shut Up



Joined: 18 Oct 2004
Karma :
PostPosted: 15:11 - 12 Jun 2007    Post subject: Some odd machines Reply with quote
Surprised

https://www.voidstar.com/bff/future.html

Laughing
____________________
Cleverly disguised as a responsible adult.
Bike:- Yamaha TRX850 | Killas Biking History | Killas Gaming History | Killas autmotive history
 Back to top
View user's profile Send private message Send e-mail Visit poster's website You must be logged in to rate posts

treble
Nova Slayer



Joined: 25 Jun 2006
Karma :
PostPosted: 15:46 - 12 Jun 2007    Post subject: Reply with quote
Wha? I don't get it. It seems like some very bored person dreaming about stripping bikes down and making them worse.

?
 Back to top
View user's profile Send private message You must be logged in to rate posts

Jack_Cheese
World Chat Champion



Joined: 14 Jul 2005
Karma :
PostPosted: 16:38 - 12 Jun 2007    Post subject: Reply with quote
https://www.voidstar.com/bff/images/wilkins1.jpg

Cool Cool
____________________
www.bikepics.com/members/jackcheese <--- NOW FOR SALE! 51 Plate Cagiva Planet 125
Quacker_boy: "Jack, you really are a dick!"
 Back to top
View user's profile Send private message Send e-mail You must be logged in to rate posts

pwntifex
World Chat Champion



Joined: 23 Aug 2006
Karma :
PostPosted: 16:46 - 12 Jun 2007    Post subject: Reply with quote
They all have beards. Shocked
____________________
the warped one: This is a follow up from the thread 'my willy hurts'
 Back to top
View user's profile Send private message Send e-mail You must be logged in to rate posts

treble
Nova Slayer



Joined: 25 Jun 2006
Karma :
PostPosted: 20:32 - 12 Jun 2007    Post subject: Reply with quote
where did you get the pics? LOL.

https://www.voidstar.com/bff/ffwhat.html

Check that out. They are claiming that "feet forward" style bikes are safer, more aerodynamic, more maneuverable... It's all a load of crap but at the same time there might just be a market out there for this kind of thing...
 Back to top
View user's profile Send private message You must be logged in to rate posts

Kickstart
The Oracle



Joined: 04 Feb 2002
Karma :
PostPosted: 21:29 - 12 Jun 2007    Post subject: Reply with quote
treble wrote:
They are claiming that "feet forward" style bikes are safer, more aerodynamic, more maneuverable... It's all a load of crap


Safer. Probably if designed that way from the start ( https://www.peraves.ch/index_english.html ). More aerodynamic? Well, difficult to get much worse than current bike (bikes aerodynamics are atrocious). More manueverable? Doubtful on that, and poor steering lock is a common problem for alternative front suspension designs.

All the best

Keith
____________________
Traxpics, track day and racing photographs - Bimota Forum - Bike performance / thrust graphs for choosing gearing
 Back to top
View user's profile Send private message Send e-mail You must be logged in to rate posts

treble
Nova Slayer



Joined: 25 Jun 2006
Karma :
PostPosted: 21:42 - 12 Jun 2007    Post subject: Reply with quote
I am surprised by the aerodynamics thing. I always assumed bikes have good aerodynamics - it's accompanied by an image of a bike in a wind tunnel with all the vectors flowing off his crouched body.

You learn something new every day...
 Back to top
View user's profile Send private message You must be logged in to rate posts

Kickstart
The Oracle



Joined: 04 Feb 2002
Karma :
PostPosted: 21:55 - 12 Jun 2007    Post subject: Reply with quote
Hi

Front might be nice and aerodynamic, but that has minimal effect. Most of the drag comes from behind, with the wake the vehicle causes. And looking at the back of a bike / rider you will see there is no useful attempt to sort that issue out.

The coefficient of drag of a 1990 Honda RS125 GP bike is 0.64, compared to 0.57 for a Hummer H2, and 0.3 for a 1982 Audi 100 (although the bike bike substantially better when area is included). Hayabusa is meant to be the most aerodynamic bike and they only manage 0.56.

All the best

Keith
____________________
Traxpics, track day and racing photographs - Bimota Forum - Bike performance / thrust graphs for choosing gearing
 Back to top
View user's profile Send private message Send e-mail You must be logged in to rate posts

veeeffarr
Super Spammer



Joined: 22 Jul 2004
Karma :
PostPosted: 22:03 - 12 Jun 2007    Post subject: Reply with quote
Kickstart wrote:
Hayabusa is meant to be the most aerodynamic bike and they only manage 0.56.


Unless Johnny's on it Laughing
 Back to top
View user's profile Send private message You must be logged in to rate posts

Jack_Cheese
World Chat Champion



Joined: 14 Jul 2005
Karma :
PostPosted: 06:59 - 13 Jun 2007    Post subject: Reply with quote
Kickstart wrote:
Most of the drag comes from behind


All of it does, air resistance acts infront. I really should have learned to not be pedantic where Keith is concerned Laughing

The only effective way to make bikes aerodynamic would be to enclose the entire machine. However, this is impractical - being in a flimsy capsule during a high-speed off isn't exactly ideal.

Jack
____________________
www.bikepics.com/members/jackcheese <--- NOW FOR SALE! 51 Plate Cagiva Planet 125
Quacker_boy: "Jack, you really are a dick!"
 Back to top
View user's profile Send private message Send e-mail You must be logged in to rate posts

Kickstart
The Oracle



Joined: 04 Feb 2002
Karma :
PostPosted: 20:52 - 13 Jun 2007    Post subject: Reply with quote
Jack_Cheese wrote:
All of it does, air resistance acts infront. I really should have learned to not be pedantic where Keith is concerned Laughing


I did toy with putting something like "hence the reason it is called drag", but decided not to.

Ho hum.

All the best

Keith
____________________
Traxpics, track day and racing photographs - Bimota Forum - Bike performance / thrust graphs for choosing gearing
 Back to top
View user's profile Send private message Send e-mail You must be logged in to rate posts
Old Thread Alert!

The last post was made 18 years, 205 days ago. Instead of replying here, would creating a new thread be more useful?
  Display posts from previous:   
This page may contain affiliate links, which means we may earn a small commission if a visitor clicks through and makes a purchase. By clicking on an affiliate link, you accept that third-party cookies will be set.

Post new topic   Reply to topic    Bike Chat Forums Index -> General Bike Chat All times are GMT
Page 1 of 1

 
 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 vote in polls in this forum
You cannot attach files in this forum
You cannot download files in this forum

Read the Terms of Use! - Powered by phpBB © phpBB Group
 
Debug Mode: ON - Server: birks (www) - Page Generation Time: 0.14 Sec - Server Load: 0.27 - MySQL Queries: 13 - Page Size: 72.33 Kb