Ducati Sporting Club UK
DesmoDue - General Questions and Chat
Discussions on the race series devised and supported by the DSC.
 
 
Thread Tools Search this Thread Display Modes
  #1  
Old 01-Nov-2013, 17:27
kiwicoops's Avatar
kiwicoops kiwicoops is offline
Registered Forum User
Mille
Bikes: M620ie, DD583R #30
 
Posts: 198
Join Date: May 2009
Why we don't use fibreglass tanks..boom

gas cloud slowmo replay footage at the end of this clip.

http://www.youtube.com/watch?v=ZJkA-_OCQVQ

pete


"Nearly all men can stand adversity, but if you want to test a man's character, give him power". Abraham Lincoln ...53 horse power should do it
Quote+Reply
  #2  
Old 01-Nov-2013, 20:53
skidlids's Avatar
DSC Region Organiser skidlids skidlids is offline
MotoGP God
 
Posts: 18,274
Join Date: Apr 2002
Mood: Its ONLY a Bike Club
I thought Vince's Barbequing of Nori at Oulton was a good enough demonstration
But that clip shows one hell of a race track


Checkout the Desmo Due Paddock on Facebook
Quote+Reply
  #3  
Old 10-Nov-2013, 12:54
Fruitbat's Avatar
Fruitbat Fruitbat is offline
Registered Forum User
Bikes: Hypermotard, 600ss
 
Posts: 49
Join Date: Mar 2010
Mood: Positively pensive
Alunium/fibreglass/steel/carbonfibre?

Didn't realise that they raced at Greymouth as well - seemed such a peaceful place when we passed thru in 2006. Those nasty noisy motorbikes...

Alloy gotta be better than fibreglass but I'm not sure anything would've survived that - full weight of the flipped bike as it returned from orbit, closely followed by a direct hit at speed by the following bike.
Steel/alloy would deform before rupturing - but what happens to carbonfibre tanks when subjected to forces that they can't cope with?
Quote+Reply
  #4  
Old 10-Nov-2013, 18:51
mat2hew's Avatar
mat2hew mat2hew is offline
Registered Forum User
Big Twin
Bikes: Monster 620ie, 916Bip, Suzuki Gs500 And a Ridgeback but I have to pedal that one
 
Posts: 1,000
Join Date: Aug 2008
Mood: Scared!
Quote:
Originally Posted by Fruitbat
but what happens to carbonfibre tanks when subjected to forces that they can't cope with?

same, that's why we're not allowed them.
Quote+Reply
  #5  
Old 10-Nov-2013, 21:14
skidlids's Avatar
DSC Region Organiser skidlids skidlids is offline
MotoGP God
 
Posts: 18,274
Join Date: Apr 2002
Mood: Its ONLY a Bike Club
Quote:
Originally Posted by mat2hew
same, that's why we're not allowed them.

Hence my reference to Vince's crash in front of Haga at Oulton

http://www.youtube.com/watch?v=LeKATCZvweE


Checkout the Desmo Due Paddock on Facebook
Quote+Reply
  #6  
Old 11-Nov-2013, 09:44
Fruitbat's Avatar
Fruitbat Fruitbat is offline
Registered Forum User
Bikes: Hypermotard, 600ss
 
Posts: 49
Join Date: Mar 2010
Mood: Positively pensive
Sorry, should have phrased the question more carefully...
Interested in exactly how CF fails - can it deform at all or does it simply splinter / rupture? Carbon/Kevlar mix any different?
Quote+Reply
  #7  
Old 11-Nov-2013, 09:46
Fruitbat's Avatar
Fruitbat Fruitbat is offline
Registered Forum User
Bikes: Hypermotard, 600ss
 
Posts: 49
Join Date: Mar 2010
Mood: Positively pensive
Sorry, should have phrased the question more carefully...
Interested in exactly how CF fails - can it deform at all or does it simply splinter / rupture? Carbon/Kevlar mix any different? Just curious

Oulton clip makes interesting viewing...
Quote+Reply
  #8  
Old 11-Nov-2013, 21:12
mat2hew's Avatar
mat2hew mat2hew is offline
Registered Forum User
Big Twin
Bikes: Monster 620ie, 916Bip, Suzuki Gs500 And a Ridgeback but I have to pedal that one
 
Posts: 1,000
Join Date: Aug 2008
Mood: Scared!
Quote:
Originally Posted by Fruitbat
Sorry, should have phrased the question more carefully...
Interested in exactly how CF fails - can it deform at all or does it simply splinter / rupture? Carbon/Kevlar mix any different? Just curious

Oulton clip makes interesting viewing...

i'm pretty sure it just breaks, the same as fiberglass, formula 1 use a soft carbon fiber and Kevlar reinforced rubbery material which bends and flexes
Quote+Reply
  #9  
Old 12-Nov-2013, 01:21
skidlids's Avatar
DSC Region Organiser skidlids skidlids is offline
MotoGP God
 
Posts: 18,274
Join Date: Apr 2002
Mood: Its ONLY a Bike Club
Quote:
Originally Posted by mat2hew
i'm pretty sure it just breaks, the same as fiberglass, formula 1 use a soft carbon fiber and Kevlar reinforced rubbery material which bends and flexes

Your probably right there Matt,
I suspect Autoclaved Prepreg CF will take more abuse than wet lay-up fiberglass , but a hard enough smack at the right angle will no doubt crack it open. Adding Kevlar probably moves this point up the curve a bit.

I think its under the FIM rules that if you run a CF tank you need a FIM approved internal fuel cell that costs more than the tank.


Checkout the Desmo Due Paddock on Facebook
Quote+Reply
  #10  
Old 12-Nov-2013, 16:02
mat2hew's Avatar
mat2hew mat2hew is offline
Registered Forum User
Big Twin
Bikes: Monster 620ie, 916Bip, Suzuki Gs500 And a Ridgeback but I have to pedal that one
 
Posts: 1,000
Join Date: Aug 2008
Mood: Scared!
Quote:
Originally Posted by skidlids
Your probably right there Matt,
I suspect Autoclaved Prepreg CF will take more abuse than wet lay-up fiberglass , but a hard enough smack at the right angle will no doubt crack it open. Adding Kevlar probably moves this point up the curve a bit.

I think its under the FIM rules that if you run a CF tank you need a FIM approved internal fuel cell that costs more than the tank.

I also remember reading somewhere that the large capacity endurance tanks have to be filled with some sort of sponge filling which prevents fuel from running out even if the tank is split.
Quote+Reply
Reply
  
Thread Tools Search this Thread
Search this Thread:

Advanced Search
Display Modes
Postbit Selector
Switch to Vertical postbit Use Vertical Postbit

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

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

Recent Posts - Contact Us - DSC Home - Archive - Top
Powered by vBulletin 3.5.4 - Copyright © 2000 - 2024, Jelsoft Enterprises Ltd. - © Ducati Sporting Club UK - All times are GMT +1. The time now is 17:55.