MK IV tubular spaceframe drawing

[H.J.Bayer]

Oldstyle....

 

[Trevor]

Yes, the construction of my chassis is somewhat different to yours, monocoque central tub with low mounted front and rear subframes, and no roll cage. I would think that the roll cage could easily add 5cm or more to the front CoG vertical location

 

[H.J.Bayer]

Interesting construction, very interesting! I don't think the roll bar has that much influence on the GC. It weighs about 17kg which is less than 2% of the total weight.

 

[Trevor]

Yes but it's impact on the CoG location must be multiplied by it's own CoG location distance from the mass centroid; i.e. a 17kg that is 70cm above the centroid will have 10 times the impact of a mass that's 7cm above the mass centroid.

 

[H.J.Bayer]

oops that's right.

 

[H.J.Bayer]

For the interested...

 

[H.J.Bayer]

 

[Hans]

I like the frond rollbar idea
For What body is your chassis designed?

 

[H.J.Bayer]

MK IV

 

[H.J.Bayer]

Next steps...

 

[H.J.Bayer]

Suspension work is done

 

[Trevor]

Just looking at your rear suspension geometry (first 2 attachments in your last post), I was trying to figure out how your arrange for mounting the bottom of the rear shock works. Is it a type of U-shaped bracket that is jointed at both ends (lower control arm and lower shock mounting)? Or is it a fixed (not rotatable) joint between the top of the bracket and the bottom of the shock?

 

[H.J.Bayer]

It is a fixed connection, so only an extension of the shock absorber

 

[Trevor]

OK, no problem. I assumed it was but couldn't tell from the views in the attachment

 

[Daniel Lorenz]

I might have spotted a potential problem area (or it just isn't visible in the photos)
The top ball joint in the front suspension upright is bolted directly to the upright.
This will probably cause binding when suspension travels up (bump) Would need a raised surface or spacer underneath the mounting surface there.

 

[H.J.Bayer]

Hello Daniel,
the joint does not rest directly on it, it just looks that way in the picture.
I have 70mm travel during compression, and for this also designed the clearance

 

[H.J.Bayer]

Hello all together,

I would like to thank everyone who answered my questions so patiently and deeply!

Without you I would never have gotten this far.
I hope this post can be of help to others on the same path.

I will no longer continue the post here now that I have started the construction of my dream car.
Everything else you can follow in my building post.

Thanks again and forgive me for my bad english.

 

[H.J.Bayer]

I am having some problems aligning my body parts.
Does anyone of you know maybe the height of the body of the MK IV,
from floor to roof ?
And how high the sills were?

That would help me to better classify a few things.
On the picture you can see what I need

 

[Jac Mac]

I am having some problems aligning my body parts.
Does anyone of you know maybe the height of the body of the MK IV,
from floor to roof ?
And how high the sills were?

That would help me to better classify a few things.
On the picture you can see what I need

Top of roof (98.0 cm high ) or 38.6'' high. Min Ground Clearance (10.2 cm ) or 4''. Ronnie Spain Book. Im assuming the two measurements were taken on same car/day and no allowance for any Gurney Bubble..

 

[H.J.Bayer]

Thanks! Do you know maybe the height of the sill