RS1,2and 3 to BR12

[shaun]

Hi all, I have welded RS 1,2 and 3 as per the book, when I came to mount onto BR12 my measurement is out by 3.1mm. The drawing on page 43 shows the distance from the rear face of BR12 to the outside of RS3 to be 406.9mm, I get 410mm. RS2 and 3 are exactly to the book measurement. Has anybody had this problem? this 406.9mm dimension looks important as this is where the hangers for the lower wishbone fit. If I put RS 2 and 3 onto the edge of BR12 my measurement is correct, but then there is no room for CP 1 and 2. Am I missing something? any help would be appreciated.
Cheers
Shaun

[shaun]

Done, sorted, small mistake on my part.:rolleyes:

[HandyAndy]

Sorry Shaun, I totally missed this thread :eek: :o

Glad you got it sorted tho, nice one :cool:

Hope all is ok with your kit? You know where I am if I can help anytime.

cheers
andy

[shaun]

Hi Andy, no problem, I left too much room on the end for the endplates.:D
All well with the kit, I am busy with the transmission tunnel at the moment, so far so good:D
I will post some pics in my build diary when I download all the pics off the camera.

[HandyAndy]

Nice one , sounds like you are really cracking on with your build

I look forward to seeing the photos of your progress :)

Is there something in the water down there? :D as there are quite a few builds in progress with my kits in your area :eek: :D

cheers
andy

[shaun]

I think it's the weather,:D haha
we might have to set up a roadster club in the south.....

[brainbug007]

I'm working on this bit as well at the moment but I'm a little confused by the top part of the frame. It looks like RS7 & a should go underneath the cross rail on the seat back section but it looks like there will be a small "wedge" of space between RS7 & a and the seat back rail? Is that right or have I messed up an angle somewhere??

[HandyAndy]

I'm working on this bit as well at the moment but I'm a little confused by the top part of the frame. It looks like RS7 & a should go underneath the cross rail on the seat back section but it looks like there will be a small "wedge" of space between RS7 & a and the seat back rail? Is that right or have I messed up an angle somewhere??

You,ve got it spot on BB, RS7 & RS7a go UNDER SB3, remembering to leave 3mm at the front face of SB3 so that when you weld on the CP2 plates its all flush with the angle of SB3 for when you come to fit the seat back panel,

You are correct, there is a small void where the end of RS7 & RS7a meet the CP2 plates, this is due to the SB3 part being canted back 17degree,s where as RS7 & RS7a are positioned horizontally, ( hope that makes sense ) :confused: :)

Have a look at the lower sketch drawing of Fig 4.15 on page 43, you can see what I mean about the 17 degree angle of SB3 in relation to RS7 & RS7a.

cheers
andy

[brainbug007]

Good stuff, I was well worried I'd messed that bit up properly and was going to have to redo it all!

[HandyAndy]

Good stuff, I was well worried I'd messed that bit up properly and was going to have to redo it all!

No worries :cool:

Enjoy the rest of your build :)

cheers
andy

[brainbug007]

This bit is well annoying! I've gone to fit the rs1-3 section and realised the "open" end of the assembly has ended up nearly 10mm over the 421mm it should be from inside wall to inside wall :( The bottom end measures up fine and the corners are 90 degrees as they should be so I guess the metal has warped at bit on me during tack welding? Should I 1) just put it on as is and adjust the measurement from the center line, 2) try and knock it with a hammer into the right size, 3) chuck it in the scrap pile and try again?

[HandyAndy]

This bit is well annoying! I've gone to fit the rs1-3 section and realised the "open" end of the assembly has ended up nearly 10mm over the 421mm it should be from inside wall to inside wall :( The bottom end measures up fine and the corners are 90 degrees as they should be so I guess the metal has warped at bit on me during tack welding? Should I 1) just put it on as is and adjust the measurement from the center line, 2) try and knock it with a hammer into the right size, 3) chuck it in the scrap pile and try again?

It does indeed seem that it has warped,

so I,d suggest not to do your suggestion number 1.......won,t be easy to get the centerline on chassis to the RS1 & RS2 whilst trying to keep it all in place at same time.....(only 1 pair of hands etc )

Option 2 is a possible ....

Option 3 ...... not needed ;)

My suggestion would be to tack in a cross brace between RS1 & RS2 to keep it at the correct measurement, tack weld the assembley into postion then remove the cross brace & then do a full check on measurements from the chassis centerline,

use a similar process with the upper part of the assembley too ;) ....basically, as you are welding some 45degree corners together its easy for the weld distortion to "PULL" outwards which has created this situation for you.

Hope that helps.

cheers
andy

[brainbug007]

Interesting idea, wonder if it would work with a bit of wood with holes drilled in it and a couple of clamps? Was also thinkin #1 might be ok as the open end doesnt connect to anything else other than br12 and instead of the inside wall of rs1/2 being 210.5 away from the centerline they'd just be 215mm away from the centerline?

[brainbug007]

Arg I thought I had this bit sorted but I've gone to fit d12/13 and found that the whole assembly is out :( I know the d12's should come down and sit on the outside of the rs7 part but mine is 19mm out so one d12 would have to sit on top rather than the side and on the other side it has a gap. Will I get away with just adding a small section of box tube between rs7 and d12 to plug the gap and just weld the other d12 on top rather than the side?

[mk1]

Hi all, I have welded RS 1,2 and 3 as per the book, when I came to mount onto BR12 my measurement is out by 3.1mm. The drawing on page 43 shows the distance from the rear face of BR12 to the outside of RS3 to be 406.9mm, I get 410mm. RS2 and 3 are exactly to the book measurement. Has anybody had this problem? this 406.9mm dimension looks important as this is where the hangers for the lower wishbone fit. If I put RS 2 and 3 onto the edge of BR12 my measurement is correct, but then there is no room for CP 1 and 2. Am I missing something? any help would be appreciated.
Cheers
Shaun

Hi Shaun,

I have got the same problem and am pulling my hair out....dont suppose you could walk me through what went wrong with yours?

Thx

Martyn