Haynes Forums  

Go Back   Haynes Forums > Haynes Roadster Forums > Running gear
FAQ Members List Calendar Search Today's Posts Mark Forums Read

Reply
 
Thread Tools Display Modes
  #1  
Old 29th December 2013, 09:31 PM
TheArf TheArf is offline
Senior Member
 
Join Date: Jan 2010
Location: Wrexham North Wales
Posts: 1,041
Default Steering rack brackets

Good evening Gents,

today I have made a bit of progress on the suspension and whilst working on the front end my mind wandered, as it does when you get to my age, doesn't it Ayjay.
It wandered to the world of the steering rack bracket, and how flimsy it looks so am thinking of coming up with a different idea.

Now to my question, is there an optimum hight from the bottom face of the chassis to the centre of the rack, I couldn't find anything in the book and I have left it over in the workshop so won't get to it until tomorrow.

kind regards

Arfon
Reply With Quote
  #2  
Old 29th December 2013, 10:22 PM
alga's Avatar
alga alga is offline
Senior Member
 
Join Date: Feb 2009
Location: Vilnius, Lithuania
Posts: 1,249
Default

95 mm, see drawing on page 75.
__________________
Albert
Haynes Roadster FAQ | Haynes Builder Locations
Gallery, build thread in Lithuanian / via Google Translate.
Reply With Quote
  #3  
Old 29th December 2013, 10:26 PM
TheArf TheArf is offline
Senior Member
 
Join Date: Jan 2010
Location: Wrexham North Wales
Posts: 1,041
Default

Thanks Alga
Reply With Quote
  #4  
Old 30th December 2013, 09:35 AM
jason 82 jason 82 is offline
Senior Member
 
Join Date: Feb 2012
Location: Coleford
Posts: 354
Default

Any reason why box section can't be used ? As long as the outside diameter is the same, surely this will strengthen up the front rack bracket considerably ? I know that it will take longer to fabricate, but as long as the wall in the box is sufficient, it should work champion.
Reply With Quote
  #5  
Old 30th December 2013, 10:25 AM
TSM Locost's Avatar
TSM Locost TSM Locost is offline
Senior Member
 
Join Date: Mar 2007
Location: Wisbech
Posts: 423
Default Steering rack

Have you seen this, Steering Rack Support Revised Drawing in book amendments.
http://www.haynesroadster.pwp.blueyo...ng_support.pdf

Fold a 3mm steel sheet to the same angle as drawing and weld front and rear.
__________________
Be Lucky, Mike.
Reply With Quote
  #6  
Old 30th December 2013, 02:26 PM
TheArf TheArf is offline
Senior Member
 
Join Date: Jan 2010
Location: Wrexham North Wales
Posts: 1,041
Default

I was thinking of using Box section and having it in the same orientation as Janne's and either drill and tap some holes or mill some slots to bolt through

Arfon
Reply With Quote
  #7  
Old 30th December 2013, 08:12 PM
flyerncle flyerncle is offline
Senior Member
 
Join Date: Mar 2008
Location: gateshead,near cobbly bit of A1 North
Posts: 3,188
Default

Two 5mm plates with bolt holes under the rack mounting fixes the flimsy aspect of it.
__________________
Cost : Little as possible.
Thanks : To those who by their generosity my build has progressed.
Its a handmade sports car not a flaming kit car !!!


If at first you dont succeed,avoid skydiving...

No parachute require to freefall,only if you want to do it twice.
Reply With Quote
  #8  
Old 30th December 2013, 11:45 PM
alga's Avatar
alga alga is offline
Senior Member
 
Join Date: Feb 2009
Location: Vilnius, Lithuania
Posts: 1,249
Default

Quote:
Originally Posted by jason 82 View Post
Any reason why box section can't be used ? As long as the outside diameter is the same, surely this will strengthen up the front rack bracket considerably ? I know that it will take longer to fabricate, but as long as the wall in the box is sufficient, it should work champion.
You'd have to incorporate crush tubes into the box section. Combine it with slots for adjustment, and it does not sound so easy at all. The alternative is to cut the tubes open and clamp to a single wall of the box section.

An alternative is to fill in the triangular sides, as Mopple has designed in his chassis Solidworks model: http://grabcad.com/library/haynes-roadster-chassis
The drawback of this approach is slightly impeded access to the clamp nuts.
Mopple's design is folded out of a single laser cut piece of 3 mm plate, if I recall correctly.
__________________
Albert
Haynes Roadster FAQ | Haynes Builder Locations
Gallery, build thread in Lithuanian / via Google Translate.
Reply With Quote
  #9  
Old 31st December 2013, 08:20 AM
voucht's Avatar
voucht voucht is offline
Senior Member
 
Join Date: Jun 2011
Location: Lautrec, Tarn (81), Occitanie, France
Posts: 879
Default

Hi,

I don't know if someone else here is using Madis (Mopple)'s modified steering rack support design, but I do, so I thought I could share some pictures.


S-rack frame par Voucht71, sur Flickr


2011-10-09_17-40-33 par Voucht71, sur Flickr

I ordered the assembly directly from him (at that time, I paid 13 euros + shipment!), it consists of 4 parts : 2 sides, 1 top (90° bent plate), 1 cross plate.


2011-09-29_15-14-50 par Voucht71, sur Flickr

I'm so glad I am using this revised design, it feels much safer than the book's design.

Here is the page of my blog about the fitting of this part on my chassis, with pictures.
http://vouchtroadster.blogspot.se/20...ring-rack.html

Hope this can help
Reply With Quote
  #10  
Old 31st December 2013, 08:54 AM
TheArf TheArf is offline
Senior Member
 
Join Date: Jan 2010
Location: Wrexham North Wales
Posts: 1,041
Default

I am missing something here, why the crush tubes, the slotting is easy just not sure why the crush tubes.

Arfon
Reply With Quote
Reply


Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

vB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Forum Jump


All times are GMT +1. The time now is 11:50 AM.


Powered by vBulletin® Version 3.6.4
Copyright ©2000 - 2024, Jelsoft Enterprises Ltd.