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-   -   chassis jig question (http://www.clubcobra.com/forums/scratch-builders-forum/75126-chassis-jig-question.html)

joey_hv 12-11-2006 08:34 PM

chassis jig question
 
just got my plans in from cobra restorers and cleaning up the garage to begin welding.
does any one have any good ideas for a jig from doing it before. kind of...

"if i was going to do this again i would..."

what would you do different?

fasterpatrick 12-12-2006 06:43 PM

Pictures work better than words,
http://www.clubcobra.com/photopost/d.../IM0006391.JPG
http://www.clubcobra.com/photopost/d.../IM0006441.JPG
http://www.clubcobra.com/photopost/d...m/IM000671.JPG
Enough said, more pics in gallery look way at the back; Patrick

mickmate 12-12-2006 07:14 PM

Brian Angliss never used a jig. If you are smart with your welding the ladder frame is the jig and all your measurements come off there. You can cause more problems with weld distortion than a jig can hold anyway. I'll be interested to see what you think of the CR prints. I have a pretty long list of "adjusted" numbers on those drawings. Welcome to the madness of scratch building let the sparks fly!

joey_hv 12-12-2006 07:58 PM

jig
 
Patrick,
I like the way you supported your rear end. I think I'll go that route.
say hey! maybe you can just sell me yours when you finish construction????
:D

joey_hv 12-12-2006 08:02 PM

jigless
 
Quote:

Originally Posted by mickmate
Brian Angliss never used a jig. If you are smart with your welding the ladder frame is the jig and all your measurements come off there. You can cause more problems with weld distortion than a jig can hold anyway. I'll be interested to see what you think of the CR prints. I have a pretty long list of "adjusted" numbers on those drawings. Welcome to the madness of scratch building let the sparks fly!

I know what you're saying but I gotta build something level to fabricate on anyway since my garage floor is on a slant so I'll probably copycat Patrick's design.
so, do the corrections you've made have to do with outright mistakes on the prints or just adjustments that made the design better?
would you be able to share the list?

mickmate 12-13-2006 04:05 AM

There's some mistakes and some omissions. I'm positioning the footbox and pedalbox now and don't believe the dimension for the pedalbox is correct. Most of my numbers are marked on the shop copy of the prints. I'd be happy to help where I can. There are many easy to make improvements but I want it as it was. We'll have plenty to discuss here.

Dominik 12-17-2006 12:59 AM

laser
 
good day,

there are lovely laser gadgets now on the market, projecting a square or rectangle into the room.
that hepls dramatically finding the center of the chassis - which you will be looking for everytime you measure.
I wish I had one, but x-mas is around the corner...


3 things come to mind quickly:
from top of chassis to top of scuttle hoop aim for 630mm

cut the rear shock mounts flush to position the trunk tub on the crossmember (of the shocks).

thing about a removeable transmission crossmember.

dominik

willsie01 12-22-2006 03:25 PM

Quote:

Originally Posted by joey_hv
just got my plans in from cobra restorers and cleaning up the garage to begin welding.
does any one have any good ideas for a jig from doing it before. kind of...

"if i was going to do this again i would..."

what would you do different?

Hi
I'm looking for cobra chassis/suspension plans and this thread seems to refer to some. Any info on suppliers of such plans much appreciated.

Three Peaks 12-22-2006 05:02 PM

The Cobra Restorer's plans are available for $200 plus shipping from www.cobrarestorers.com . They are chassis plans with the bird cage included, but they don't include suspension plans.


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