Haynes Forums  

Go Back   Haynes Forums > Haynes Roadster Forums > Chassis
FAQ Members List Calendar Search Today's Posts Mark Forums Read

Reply
 
Thread Tools Display Modes
  #1  
Old 23rd January 2012, 09:08 PM
TheArf TheArf is offline
Senior Member
 
Join Date: Jan 2010
Location: Wrexham North Wales
Posts: 1,041
Default Rollbar?

Hi just a quick ? Does the rollbar have to be constructed out of one continuous length or can you use thick wall pipe and weld elbows

Arfon
Reply With Quote
  #2  
Old 23rd January 2012, 09:24 PM
Cyberbeej Cyberbeej is offline
Senior Member
 
Join Date: Nov 2008
Location: Dalry,Ayrshire, scotland
Posts: 241
Default

Not sure on the IVA side but much stronger if in made in 1 piece.
Reply With Quote
  #3  
Old 23rd January 2012, 09:41 PM
vmax1974's Avatar
vmax1974 vmax1974 is offline
Senior Member
 
Join Date: Apr 2011
Location: Teesside
Posts: 1,140
Default

One piece is stronger I intend to have mine done out of 75mm cds and bent using a friends hydrolic mandrel bender but made to my own design but not sharing that just yet
Reply With Quote
  #4  
Old 24th January 2012, 08:52 PM
rapidtornado's Avatar
rapidtornado rapidtornado is offline
Senior Member
 
Join Date: Jan 2009
Location: Herefordshire
Posts: 330
Default

Just bought the tube to do mine, borrowing a clarke 12ton hydraulic press off a mate to do the bends, I've been told to pack the tube with wet sand prior to bending as this should prevent creasing... not sure if it will work but nothing to lose. Using 50mm x 3mm wall for the main hoop and 38mm x 2.6mm for cross bar and rears supports.... good deal on ebay at the moment for 38mm tube think it was 20 delivered for 2M and discount if you order more.. ITEM# 160148565771

Rapid... I'll post a pic once done (if it looks ok , if it looks crap I'll sit in the corner and sulk )
Reply With Quote
  #5  
Old 24th January 2012, 09:22 PM
TheArf TheArf is offline
Senior Member
 
Join Date: Jan 2010
Location: Wrexham North Wales
Posts: 1,041
Default

A mate of mine owns his own fabrication shop so he would bend them for me but I have a couple of ideas bouncing around in my head about the design. One of the designs would be easier to fab in sections rather than trying to do it in one complete length

Arfon
Reply With Quote
  #6  
Old 24th January 2012, 10:35 PM
Cyberbeej Cyberbeej is offline
Senior Member
 
Join Date: Nov 2008
Location: Dalry,Ayrshire, scotland
Posts: 241
Default

The sand filling worked for me.
Just take your time and try not to bend to tightly to quickly and use the outmost pivot rollers.
Reply With Quote
  #7  
Old 25th January 2012, 07:16 AM
vmax1974's Avatar
vmax1974 vmax1974 is offline
Senior Member
 
Join Date: Apr 2011
Location: Teesside
Posts: 1,140
Default

My mate uses the wet sand method too but he says make sure its well packed in there

My cage will be in 3 pieces with lots of angled fishmouths to cut and a couple of quite tight bends but I got my mate bending mine for me or I may just buy I normal one and make do
Reply With Quote
  #8  
Old 25th January 2012, 10:33 AM
Twin's Avatar
Twin Twin is offline
Senior Member
 
Join Date: Jun 2010
Location: Chester
Posts: 415
Default

Quote:
Originally Posted by vmax1974 View Post
One piece is stronger I intend to have mine done out of 75mm cds and bent using a friends hydrolic mandrel bender but made to my own design but not sharing that just yet

Remember they are funny about double bends too!
__________________
Twin

CSF 857.19

Twins Roadster
Reply With Quote
  #9  
Old 25th January 2012, 11:49 AM
vmax1974's Avatar
vmax1974 vmax1974 is offline
Senior Member
 
Join Date: Apr 2011
Location: Teesside
Posts: 1,140
Default

I know may have to do the special one post iva like everything else that is in my head
Reply With Quote
  #10  
Old 25th January 2012, 01:05 PM
Talonmotorsport's Avatar
Talonmotorsport Talonmotorsport is offline
Senior Member
 
Join Date: Oct 2007
Location: Southminster Essex
Posts: 1,323
Default

Quote:
Originally Posted by Twin View Post
Remember they are funny about double bends too!
I think that only relates to the rules as laid out in the MSA blue book for racing. If it's only going on the road or track days you can design and make it out of what ever you want. I remember seeing a seven at the Stafford show a few years back that had a cage made from 1.6mm stainless exhaust tubing all polished up.
__________________
Website http://www.talonmotorfabrication.co.uk/

Direct email phil@talonmotorfabrication.co.uk

talonmotorfabrication@gmail.com

Mobile office hours 07514098334
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

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


All times are GMT +1. The time now is 09:17 AM.


Powered by vBulletin® Version 3.6.4
Copyright ©2000 - 2019, Jelsoft Enterprises Ltd.