Technical Magentas story 4x4 rebuild

[kolza]

CityRover rear coils are 114mm OD iirc, first from right vs. front 4x4 coils second from left.

They are dual rate sprong which might be even better for your application.

Where chopped to suit 2wd rear, clearly can see that the softer rate section is almost closed .

 

[Sjvarley]

Mammoth effort.
I remembered a post yesterday that may be of interest for this build

Mm a little pricey though at the 350 € plus bracket

 

[Sjvarley]

Today got on with the rear suspension set
Up both trailing arms now complete and connection made to the rear Axel
To judge the extent of travel in all positions and effects on the U.J. Connection blocks of wood cut
1 fully compressed spring
2 spring @ 80% preload
3 at full extent + 50mm overtavel
A laser was set up to read the effect on the flange

Looking good on articulation now but
Practical test will show up problems
Third link now made up ready for fitting .

 

[lprescott]

Today got on with the rear suspension set
Up both trailing arms now complete and connection made to the rear Axel
To judge the extent of travel in all positions and effects on View attachment 185057the U.J. Connection blocks of wood cut
1 fully compressed spring
2 spring @ 80% preload
3 at full extent + 50mm overtavel
A laser was set up to read the effect on the flange
View attachment 185058View attachment 185059View attachment 185060View attachment 185061View attachment 185062
Looking good on articulation now but
Practical test will show up problems
Third link now made up ready for fitting .

WOW, engineering prowess, speed, vision and now a LAZER!

So much envy

 

[Sjvarley]

Here shown the fourth link. In placey

Connections to be desgined then made up and fitted Brian set up to be used.at the front

 

[lprescott]

Now I am no engineer but does the central location of the read diff not cause problems? And I know that for the travel you are after and the width of a panda a panhard rod is out. What about some variant of a Peaucellier–Lipkin linkage

 

[Sjvarley]

Well that’s a big name
I will have to google that. Liam when the attachments are fitted all problems may show themselves at the present it’s pretty favourable with the present set up But who knows ???? Google now !

S

 

[lprescott]

Well that’s a big name
I will have to google that. Liam when the attachments are fitted all problems may show themselves at the present it’s pretty favourable with the present set up But who knows ???? Google now !

S

#i love maths... sad I know

 

[Derek C]

 

[Sjvarley]

Brilliant Many moving part here though this how I see it section. But without moving the fuel tank l

The fixed triangulated link is being tried the link to diff which is offset will be made with a rose joint here is pandik version of free axel
2 connections to axel and top link panarrd rod [ATTACH]185073._xfImport[/ATTACH] here's the. Full home made kit

 

[lprescott]

https://www.youtube.com/watch?v=ubF8iNEeij0

Rube Goldberg machines are fantastic. It is a shame the link is poorly made.

 

[Sjvarley]

Links have now been made up and the body connection
Temporary position seems to be spot on at the diff

Articulation of 300 mm wheel centre to the wheel arch bottomed one side to furthest travel opposite wheel 700mm
Not sure wether this would be the maximum possible but pretty happy with it. The prop shaft turns freely in all positions except
Both wheels at full spring length and an additional 70mm of over travel This occurrence would only occur if fully airborne or body see sawing on a obstruction. Rare I guess .
Video of the working link
[ame]https://youtu.be/N99e_dmvgKc[/ame]

 

[lprescott]

Links have now been made up and the body connection View attachment 185082
Temporary position seems to be spot on at the diff View attachment 185083

Articulation of 300 mm wheel centre to the wheel arch bottomed one side to furthest travel opposite wheel 700mm
Not sure wether this would be the maximum possible but pretty happy with it. The prop shaft turns freely in all positions except
Both wheels at full spring length and an additional 70mm of over travel This occurrence would only occur if fully airborne or body see sawing on a obstruction. Rare I guess .
Video of the working link
https://youtu.be/N99e_dmvgKc

Was the prop shaft being turned by hand in the video? It seemed to be a bit jerky but it could just be the frame speed on the video. All looking fantastic. I wasn’t expecting the 4th link to join to the diff

 

[Sjvarley]

Yes and I slowed the frame rate down for the demo really it’s the linkage I.S the same as a defender but a right-angled triangle intstead of an isosceles a rose joint I.S used to provide moment on the Cntr
Next job add the shockers and spring hangers and bumpstops

 

[lprescott]

Yes and I slowed the frame rate down for the demo really it’s the linkage I.S the same as a defender but a right-angled triangle intstead of an isosceles a rose joint I.S used to provide moment on the Cntr
Next job add the shockers and spring hangers and bumpstops

So how many hours?

 

[Sjvarley]

Hours to date 45 hrs

 

[Sjvarley]

Fabricating the fulcrum point today for the rear Axel bolted to the diff bolts and then welded a bracket to the tube of the Axel
50 hrs

 

[Sjvarley]

Here’s the pics
fulcrum point attachment plate for the rose joint
Connections for the swing arms

 

[Sjvarley]

It’s been a little slow this weekend a bit of garden work and fixes around the house ,
but have managed to fit the swing arm lowering adaptor stuck with the 50 mm lift here the same as BFG


Next job will be to make the longer engine mounts -50mm
Longer gear box mount _50mm
Rear gearbox. Mount -50mm
Add 25 x50 box section to the
Front lowers crossmember

 

[Sjvarley]

Had a rethink on the shock mods as we did to panda Brian BFG thread 3 sisley s
Instead of making parts to bolt around and clamp this time decided to add a cut off section from an old ball joint housing then weld in place
Note 2wd & 4wd housings are identical except for the holes 12 mm not 10mm