Roll Over Protection discussion

deviant · Postby **deviant** » Wed Jan 04, 2012 6:54 pm

I am looking at all this stuff again for my NB as I will be hitting the track in it and I am also thinking of getting a log book on it so need roll over protection that is CAMS compliant.

Looking at the guidance given in the CAMS manual, Schedule J, Page 10, Section 13 for open sports cars: http://www.camsmanual.com.au/pdf/10_gen ... 2012-1.pdf

And then looking at a pic of a BD bar and a + bar I think the BD is 'more compliant' with the rules regarding the distances at which the rear stay and cross bar must meet each other and also how far out towards the side of the car the vertical legs of the main hoop are (the drivers shoulder is not supposed to stick out of the main hoop)...the BD bar seems to sit out to the side of the car further?

http://www.mx5plus.com.au/part_display. ... =214&cat=8

http://www.mx5mania.com.au/product612.htm

Mr nanotech · Postby **Mr nanotech** » Fri Jan 20, 2012 3:18 am

Been asking about roll bars on other forums and people overseas seem to say that our BD bar is just a glorified style bar and will do nothing in the event of an accident due to the parcel shelf mounting position.
Is there any truth to this? Why DO we use the parcel shelf instead of cutting through it and mounting lower in the boot on something more 'structural'?

Guran · Postby **Guran** » Fri Jan 20, 2012 6:38 am

If the BD bar rear struts were attached to the parcel shelf at a single point on either side, they'd have a point. However it's not. It uses a wide plate across the width of the parcel shelf, which spreads the load and according to Brown Davis it does the job fine.

Earlybird · Postby **Earlybird** » Sat Jan 21, 2012 8:50 am

nanotech wrote:Been asking about roll bars on other forums and people overseas seem to say that our BD bar is just a glorified style bar and will do nothing in the event of an accident due to the parcel shelf mounting position.
Is there any truth to this? Why DO we use the parcel shelf instead of cutting through it and mounting lower in the boot on something more 'structural'?

Sounds like a typical ill informed opinions you would expect on the internet....

I have a BD in mine and have no intention on flipping my car on its lid to test the roll bar integrity. CAMS approval is peace of mind enough for me.

The only downside to the BD bar is that the cross brace impedes rear vision in mirror and when looking over my left shoulder.

Mr Morlock · Postby **Mr Morlock** » Sat Jan 21, 2012 6:10 pm

if one is really concerned about driver safety on the roads then buy the later model cars with either all the ANCAP stars or ones at least with air bags. Knock it if you like but an airbag is a darned good investment. As an aside I recall a colleague QA manager who was provided with a co car but who opted for extra safety features for his family out of his own pocket. At the time I thought this was odd but now the Stars are virtually a given with new and quality cars. If I was going racing I would probably fit a roll bar and have little doubt that the BD unit is as well engineered as the others.

Mr nanotech · Postby **Mr nanotech** » Sat Jan 21, 2012 6:42 pm

I have no question in my mind that the brown davis is strong. My only query is the parcel shelf. I've seen all the tests and so on performed on the bar itself but I just don't see how the parcel shelf can take the force of impact. Even it the force is distributed more evenly, it's still across such a thin surface.

tbro · Postby **tbro** » Sat Jan 21, 2012 8:28 pm

We all know Rollbars are for contemptuously dismisses and won't support anything and here's proof

Oh! Fucken hell it did work :roll:

plohl · Postby **plohl** » Sat Jan 21, 2012 10:54 pm

that roll bar looks like a weld in job.

just saying.....

manga_blue · Postby **manga_blue** » Sat Jan 21, 2012 10:58 pm

Tell me, Terry, about the name on that car? Is that a Qld driver whose name on this forum begins with a B?

Edit: never mind ... just read the company name on the rear quarter.

When did he do that?

Postby **orx626** » Sat Jan 21, 2012 11:03 pm

manga_blue wrote:Tell me, Terry, about the name on that car? Is that a Qld driver whose name on this forum begins with a B?

Edit: never mind ... just read the company name on the rear quarter. When did he do that?

The name on the windscreen was the guy who was driving. Not Boags. :beer:

manga_blue · Postby **manga_blue** » Sat Jan 21, 2012 11:06 pm

Thanks, had me worried there for sec.

deviant · Postby **deviant** » Sun Jan 22, 2012 2:03 pm

What brand is that bar and what is the method of installation? Are there more pictures of it?

tbro · Postby **tbro** » Sun Jan 22, 2012 6:34 pm

manga_blue wrote:Tell me, Terry, about the name on that car? Is that a Qld driver whose name on this forum begins with a B?

Edit: never mind ... just read the company name on the rear quarter. When did he do that?

It was Nick who was driving at a Top gear PSCRAQ event. Apparently they had rotated the tyres and it bit Nick big time going into the Carossel.

Car was stuffed so everything was transfered into another body.

tbro · Postby **tbro** » Sun Jan 22, 2012 6:42 pm

deviant wrote:What brand is that bar and what is the method of installation? Are there more pictures of it?

I believe it's a Norm Singleton bar, welded in.Norm has been building bars and stuff since before JC played cricket for Israel.

If for racing only,as in non registered cars, I wouldn't even consider either DB or TB bar as a full cage is only $700 to $800 more and a lot better.

Terry

deviant · Postby **deviant** » Sun Jan 22, 2012 10:54 pm

Thanks for the info regarding the cage in the rolled MX5.

Check out the NCOP guidelines, they tell you what you can have in a road car. I dont think a full cage would get on the road but you can engineer a half cage fine.