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Old 16th May 2011, 18:32   #31
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Default Re: Flexural Stresses on Jeep Hardtop

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Originally Posted by fazalaliadil View Post
Tejas,

In short the twist originates from the chassis which is passed on to the tub.
Regards,
YES!

Now there are two ways of fixing this issue:

1. Prevent/reduce the chassis from flexing. This can be done by making the C section into a box section. However this will reduce articulation. On a ramp test between an NGCS and a regular army MM550 there was a noticeable difference. The regular one went up the ramp by ~2inches. This 2" in my opinion is very crucial.

2. Prevent the flex being transmitted to the tub from the chassis. This can be done how? More flexible mounting? Is something like it available? If used, it will increase body roll too!

Another thing that i can think off is a flexible joint between the hard top and the jeep chassis. How? I don't want to use airport carousels.

Even in case we do find out a way to have a flexible/compressible joint system, how much give/flex should it give or take?
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Old 16th May 2011, 20:44   #32
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Default Re: Flexural Stresses on Jeep Hardtop

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Originally Posted by Tejas@perioimpl View Post
Prevent/reduce the chassis from flexing.
Simple Doc, Just have as RIGID a CHASSIS as possible. If I were you and my doors aint shutting because of the damn articulation, I'd remove the door and move on

Lifting a wheel and carrying on with TRACTION is better than having all wheels on the ground and all flexing happening. This rubber band flex will affect your ONROAD handling as well and make it worse.

The Trade off point is what one needs to decide and take a call while preparing any vehicle.
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Old 17th May 2011, 10:47   #33
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Default Re: Flexural Stresses on Jeep Hardtop

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Originally Posted by headers View Post
Simple Doc, Just have as RIGID a CHASSIS as possible. If I were you and my doors aint shutting because of the damn articulation, I'd remove the door and move on

Lifting a wheel and carrying on with TRACTION is better than having all wheels on the ground and all flexing happening. This rubber band flex will affect your ONROAD handling as well and make it worse.

The Trade off point is what one needs to decide and take a call while preparing any vehicle.
After my "Classic" days, my first point for the new jeep was to have doors and an AC. Extremely important to keep the elements out.

I guess i will have to go with the full 6 point roll cage upto the chassis to reduce flex and then go in for the hardtop.

Time to get dif locks to compensate for the lift of the wheel!
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Old 12th September 2011, 12:16   #34
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Default Re: Flexural Stresses on Jeep Hardtop

Bumping up this thread.

Since i have gone the SPOA way, i'm now looking at making the chassis more rigid since the SPOA will make up for the decrease in articulation.

Anyone get anymore ideas?
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Old 12th September 2011, 13:21   #35
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Default Re: Flexural Stresses on Jeep Hardtop

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Originally Posted by Tejas@perioimpl View Post
Bumping up this thread.

Since i have gone the SPOA way, i'm now looking at making the chassis more rigid since the SPOA will make up for the decrease in articulation.

Anyone get anymore ideas?
Can you share pics of the SPOA setup?
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Old 12th September 2011, 13:28   #36
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Default Re: Flexural Stresses on Jeep Hardtop

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Can you share pics of the SPOA setup?
Will do it soon. Write up about the jeep in the assembly line as of now.

Still pondering about the half / rally style hardtop design.
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