Rollbar?

[TheArf]

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

[Cyberbeej]

Not sure on the IVA side but much stronger if in made in 1 piece.

[vmax1974]

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

[rapidtornado]

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 )

[TheArf]

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

[Cyberbeej]

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.

[Twin]

Originally Posted by vmax1974

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!

[vmax1974]

I know may have to do the special one post iva like everything else that is in my head

[Talonmotorsport]

Originally Posted by Twin

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.

[flyerncle]

Could be wrong but there is no requirement in the IVA manual for any roll bar to be fitted and it is only used (apart from being a roll bar)to mount the seat belt mountings,an adittion to Talons comment on the Blue books reqiurement's in motorsport is for a rear protection to be fitted, its a good idea to fit a rear bar to the Roadster rear stay's.