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Old 7th December 2013, 00:30   #31
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Default Re: Thar Hard Top, how safe in a roll over?

Quote:
Originally Posted by Thar4x4 View Post
1. Six point roll cage:
- Are there any standard guidelines to make it.
I remember seeing some designs/guidelines in the rdh instructions book...guess if its good enough for rallying it should be good enough. Not sure if its over engineered though for 'regular' cars.
Here's the link
http://www.raid-de-himalaya.com/2010.../raidtrial.htm
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Old 7th December 2013, 08:02   #32
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Cool Re: Thar Hard Top, how safe in a roll over?

Quote:
Originally Posted by red herring View Post
I remember seeing some designs/guidelines in the rdh instructions book...guess if its good enough for rallying it should be good enough. Not sure if its over engineered though for 'regular' cars.
Here's the link
http://www.raid-de-himalaya.com/2010.../raidtrial.htm
Thanks Red, because of you I went further & found the following

I found this Very interesting

http://www.fmsci.co.in/2012/regulati...4wtr.rally.pdf

Highlighting below by copy paste, for the purpose of the thread

ARTICLE 6 : SAFETY BELTS

ARTICLE 8 : SAFETY CAGES

Any one wants to do something seriously, check this section particularly, this is the brother of "CMVR"



Sudarshan
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Old 7th December 2013, 09:59   #33
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Exclamation Re: Thar Hard Top, how safe in a roll over?

Edit For the ease of readers, providing page No.s

Quote:
ARTICLE 6 : SAFETY BELTS
From Page 21 To Page 24

Quote:
ARTICLE 8 : SAFETY CAGES
From Page 26 To Page 38




Note for BHP Support, this is not a back to back post, only edited after some realization, that readers will benefit from the added information.

Yet these two posts can be merged or edited for the benefit of the reader

Sudarshan

Last edited by Sudarshan : 7th December 2013 at 10:02.
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Old 8th December 2013, 08:30   #34
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Default Re: Thar Hard Top, how safe in a roll over?

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Originally Posted by akshay4587 View Post
Ouch;what was the registration number of the vehicle sir?
Quite a few Modded Thars and Jeeps with HT's and what not,roam around the city beautiful,its just that the cops mess around more with outstation vehicles.
Yes it was a MH registered vehicle. But last week another rallyits from city itself was stopped and ticked off for driving a modded vehicle.


Quote:
Originally Posted by Thar4x4 View Post
1. Six point roll cage:
- Are there any standard guidelines to make it.
The link to FMSCI specs is already shared.

The important point is that the roll cages are not only designed for side roll but also frontal impact. And they work. Speaking from personal experience of going head on - with combined speed in excess of 100kmph - in a Zen in to a oncoming bus head on....and yet typing away here.
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Old 8th December 2013, 10:29   #35
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Default Re: Thar Hard Top, how safe in a roll over?

1. Hard tops would not save you from a rollover if it does not have a roll cage built into it. It will crumble.

See this.

.

(It is not really a Roll cage, rather, a ROPS).

2. I don't think you need FIA specification roll cages for normal usage where the car is not going to do multiple rollovers at high velocity like in rallying. But the designs can be used as a reference. (Even a single Roll hoop mounted to the frame can go a long way in protecting occupants)

3. The roll cages and ROPS are always said to be SECONDARY protection. The PRIMARY protection is still the Seatbelt. So, If you don't wear a seatbelt, the Roll cage would be useless.

Last edited by wantarangerover : 8th December 2013 at 10:30.
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Old 12th December 2013, 05:18   #36
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Default Re: Thar Hard Top, how safe in a roll over?

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Originally Posted by sudev View Post
....and as a aside. Recently I was stopped by Chandigarh police who deemed that hardtop was a modification not reflected in the RC of the vehicle and so I need to be challaned!!
That is certainly news, my Thar has been stopped in Chandigarh, where my standard sized tires have been dourly looked at, and questioned that they might be peeking out of the fender flares, lacking any evidence, I was let go off.

With a hard top on, getting away from a challah in Chandigarh might seem difficult!
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Old 18th January 2014, 23:53   #37
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Default Roll Cage for Thar

Dear BHPians


I am seeking a good design of a roll cage for the Thar.

What would be the diameter / NB size for the rolls cage bars?

What would be the design inputs for the roll cage?

Looking forward to your contributions.

Warm Regards

Mohan Rao
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