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Roll hoop
Jesus-Ninja - 27/11/08 at 07:56 AM

Do you actually have to have one? Maybe I'm being blind, but I can't see any reference to it in the IVA! Are there specifications for it's construction, size location, etc?

The reason I ask is that there may be an issue with visibility, so for the test I could raise the seat up, so that the arches fall out of the plane of view, but then the roll hoop would be level with the top of the drivers (my!) head - less than ideal in a roll!

speedyxjs - 27/11/08 at 08:02 AM

Just SVA/IVA without it and put it on after

Jesus-Ninja - 27/11/08 at 08:15 AM

quote:
Originally posted by speedyxjs
Just SVA/IVA without it and put it on after


Nice idea , but it's a structural part of the construction - ie it's welded in and is an intgral part of the chassis - it extends down to the floor on each side, and the rear stays are tied into the suspension. See pics...






So..............

.... if the driver's head goes above this, is it an issue? If it could be SVA'd with no hoop at all, then presumably not, provided the hoop itself doesn't pose any threat.

[Edited on 27/11/08 by Jesus-Ninja]

russbost - 27/11/08 at 08:31 AM

TTBOMK there is no requirement for a roll hoop at all for SVA & presumably will be similar for BIVA - I think you are worrying yourself excessively about the view of the road ahead - there are plenty of both kit & mainstraeam cars where the front of the car intrudes into your vision, depends on how you read the manual.

maartenromijn - 27/11/08 at 08:32 AM

If you do not attach a safety harness to the hoop, it is cosmetical only. If you add some padding to prevent injury from head-on collission, I don't see any problems with the hoop being too low. THE QUESTION IS: DO YOU WANT IT???

Even when you lower your seat a bit after the test, will there be enough visibility? Moreover, you can better have a hoop being a couple of inches taller than the top of your racing helmet.

See this thread.

Your chassis looks btw!

Jesus-Ninja - 27/11/08 at 08:44 AM

quote:
Originally posted by maartenromijn
If you do not attach a safety harness to the hoop, it is cosmetical only. If you add some padding to prevent injury from head-on collission, I don't see any problems with the hoop being too low. THE QUESTION IS: DO YOU WANT IT???

Even when you lower your seat a bit after the test, will there be enough visibility? Moreover, you can better have a hoop being a couple of inches taller than the top of your racing helmet.

See this thread.

Your chassis looks btw!


Yes, I definitely want the hoop!But of course, under normal conditions (ie after the test) I'd want it to be higher than the driver, which it is with the seat in the current position.

Visibility is fine, IMHO, but reading the regs, my wheel arch will be in the field of vision on the passenger side.

here you can see the area that is in view: the top mount sticking through the bonnet, which will be covered by an arch.


maartenromijn - 27/11/08 at 08:57 AM

If you want to lower your seats after the test, I'd just tell IVA that the hoop is cosmetic. Do ad some padding.

Are you going to IVA it with or without body? Or will you put your head trough the sunroof when your seats are higher for the test??

Jesus-Ninja - 27/11/08 at 09:05 AM

quote:
Originally posted by maartenromijn
If you want to lower your seats after the test, I'd just tell IVA that the hoop is cosmetic. Do ad some padding.

Are you going to IVA it with or without body? Or will you put your head trough the sunroof when your seats are higher for the test??


LOL!

I will be testing it with no roof and no windscreen, just the rear hatch / engine cover.

But yeah, it could look a little odd. I remember a teacher of mine, Mr Brown, built a project car at the school. It was like a miniature mini, and there was more of him above the car than inside it! He used to drive it into school too!