Sturdiness of the NC

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StuwieP
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Re: Sturdiness of the NC

Postby StuwieP » Tue Feb 13, 2018 2:14 pm

Mr Morlock wrote:Roll bars like we see on the forum arguably are for racetracks and many people complain about headroom etc. Many road cars get rear ended and a roll bar may actually strike your head. There seems a paucity of facts "on the risk". .


Slightly OT but unless you really do something weird with your roll bar/seat combo (or if you're really tall and the seat ends up beneath the main hoop), there's about no chance at all of striking your head in any crash.

Different story with a full roll cage, of course.
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Re: Sturdiness of the NC

Postby StanTheMan » Tue Feb 13, 2018 4:53 pm

well in the NA's & NB8A's with standard seats fitted with specificaly foitted with a Brown Davies bar will have all those issues.

NB8B seats will be taller & don't have some of those issues.....but who fits NB8B seats into their NA's or NB's these days....
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Re: Sturdiness of the NC

Postby greenMachine » Tue Feb 13, 2018 8:03 pm

StuwieP wrote:
Mr Morlock wrote:Roll bars like we see on the forum arguably are for racetracks and many people complain about headroom etc. Many road cars get rear ended and a roll bar may actually strike your head. There seems a paucity of facts "on the risk". .


Slightly OT but unless you really do something weird with your roll bar/seat combo (or if you're really tall and the seat ends up beneath the main hoop), there's about no chance at all of striking your head in any crash.

Different story with a full roll cage, of course.


As usual, we only get half the story from MM. This is at least the second time that I have pointed out to him that there is such a thing as rollbar padding.

If MM is concerned about risk of head injury, he should sit in his car with the soft top up, turn his head 90 degrees to the right and set to thinking about what that soft top frame is likely to do in a driver's side impact (same with the passenger for a LHS impact). /rant.

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Re: Sturdiness of the NC

Postby NitroDann » Tue Feb 13, 2018 8:30 pm

Well I think he is right about rollbars in street cars.

I sit in a LOT of modified 5s and most rollbar installs are certainly less safe than stock. Its not that they can't be safe, but most arent.

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Re: Sturdiness of the NC

Postby Mr Morlock » Tue Feb 13, 2018 8:51 pm

any volunteers for a demo with a cricket bat wrapped in padding- aimed at the head. Anyone want to step into the ring with Jeff Horn even with 10 oz gloves- I dont think so. Roll bar padding is a mitigator and race car drivers also wear high tech crash helmets and often full race seat belts . The subject car did not have that type of roll bar.

Insofar as the std car Mazda said "Welcome to the Mazda safety zone. High tensile steel adds to the protection of the Mazda Advanced impact distribution and absorption system" It then goes on to mention airbags. Under safety and Theft prevention in the brochure it does not mention roll hoops at all. I would take this to mean the car is designed with many integrated features planned by the engineers.

Anyway it does seem the NC is well designed vehicle with safety features. Thanks JBT for the picky- interesting... PS just noticed Dann's comments - at least we can think about it- cheers.

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Re: Sturdiness of the NC

Postby NitroDann » Tue Feb 13, 2018 8:57 pm

Comments about soft top frames are silly also IMO.

I would bang my head on a soft top frame full force 5 times to watch that poster do the same once on an unpadded rollbar.

Its going to cut me up and ill have a bad week but I wont die instantly.

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Re: Sturdiness of the NC

Postby RS2000 » Tue Feb 13, 2018 9:05 pm

Mr Morlock wrote:any volunteers for a demo with a cricket bat wrapped in padding- aimed at the head


The latest Cams approved padding is just as hard as a cricket bat!

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Re: Sturdiness of the NC

Postby ianoz » Tue Feb 13, 2018 9:25 pm

it's hard - but I think CAMS expect you to hit it with a helmet rather than a skull.. What it doesn't seem to be is UV stable :evil:

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Re: Sturdiness of the NC

Postby StuwieP » Wed Feb 14, 2018 1:09 pm

Mr Morlock wrote:Insofar as the std car Mazda said "Welcome to the Mazda safety zone. High tensile steel adds to the protection of the Mazda Advanced impact distribution and absorption system" It then goes on to mention airbags. Under safety and Theft prevention in the brochure it does not mention roll hoops at all. I would take this to mean the car is designed with many integrated features planned by the engineers.

Anyway it does seem the NC is well designed vehicle with safety features.


This isn't meant as disagreement, but do you really think that Mazda is going to mention roll hoops in their sales brochure? Doesn't take much thought of a roll-over to dissuade customers - even if those who really thought about it realise that a roll-over is even less likely in the mx-5 than most passenger cars (esp compared to the much vaunted SUV/crossovers of today's market). Roll-bars must form part of the car's structure - the cutaway pic posted above shows they clearly are - but that doesn't mean Mazda is going to brag about them.

The more "active" roll hoops in some luxury cars are perhaps more 'advertisable' feature, but they have their own problems, don't they? Like going off when high-G force is detected, such as on a race track, when a roll over is not actually in progress.

NitroDann wrote:Comments about soft top frames are silly also IMO.

I would bang my head on a soft top frame full force 5 times to watch that poster do the same once on an unpadded rollbar.

Its going to cut me up and ill have a bad week but I wont die instantly.

Dann


Are you talking about a roll cage or just the typical 4-point rear-hoop roll bar?

I've been in a front-side impact crash (yay for people turning out onto the wrong side of a road, without looking left) at low speed (~45kph combined - since I'd started to brake!) and hit my head on the soft top frame. I wouldn't want to hit it in a proper crash. But there's a 0% chance that I hit my head on the roll bar in any crash without either breaking my neck and being ejected backwards over my seat, or something running over the back of the car so badly that the roll-bar is forced forward over my seat - again, perhaps a bigger worry?
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Re: Sturdiness of the NC

Postby NitroDann » Wed Feb 14, 2018 3:54 pm

Heaps of people have rollbars you will die with if you get rear ended.
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Re: Sturdiness of the NC

Postby StuwieP » Wed Feb 14, 2018 4:02 pm

because they just crumple forward?
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Re: Sturdiness of the NC

Postby NitroDann » Wed Feb 14, 2018 4:16 pm

No, because its extremely easy to hit your head on it.

Its like 3 inches away with little to stop you hitting it.

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Re: Sturdiness of the NC

Postby bruce » Wed Feb 14, 2018 4:33 pm

I think we've run into a COW...

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Re: Sturdiness of the NC

Postby NitroDann » Wed Feb 14, 2018 4:39 pm

I think people need to watch some more crash test dummy footage before they claim their rollbar is unable to strike their head.

Thats my opinion.

10kph rear ender.


https://youtu.be/NMJLnKWWwnQ


What if thats diagonal and 60kph?

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Re: Sturdiness of the NC

Postby NitroDann » Wed Feb 14, 2018 4:57 pm

Another. The head moves like 8 inches back and 2 inches up.

I bet that is where your rollbar is.

https://youtu.be/IyWeR2JSkfs
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speed wrote:If I was to do it again, I wouldn't even consider the supercharger.


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