LocostUSA.com

Learning how to build Lotus Seven replicas...together!
It is currently July 23, 2021, 1:02 pm

All times are UTC - 5 hours [ DST ]




Post new topic Reply to topic  [ 7 posts ] 
Author Message
PostPosted: August 6, 2020, 6:24 pm 
Offline

Joined: September 22, 2005, 10:29 am
Posts: 509
In addition to my build, A friend is prepping his Locost for the track, and I'm encouraging him to add some protection. Here's the basic jist of what I'm going to recommend (The picture is of my old car, not his)
Image

My question is how to attach it. It's easy enough to weld in everything with permanent connections, OTOH it would be nice to have the thing removable as well. I've been looking for hard data about removable attachment techniques and their relative strengths. Here's a picture of a more elaborate build than what I have in mind, but it is useful for illustration.

Image

I'd love feedback and technical references, if possible.


Top
 Profile  
Reply with quote  
PostPosted: August 8, 2020, 9:52 am 
Offline

Joined: September 15, 2018, 11:37 am
Posts: 32
Best that I have seen in reference to removable roll cage components is the SCCA GCR
where it shows the acceptable means for attaching said components. It as discusses the restrictions for roll cage design in order to pass inspection. I plan on referencing it often when I build my structure.


Top
 Profile  
Reply with quote  
PostPosted: August 8, 2020, 10:05 am 
Offline

Joined: September 15, 2018, 11:37 am
Posts: 32
Here are the pages from the GCR. Apologize for the format, but I’m restricted to an iPhone until I get my computer set up after the move. Here is the link to find the GCR: https://www.scca.com/downloads


Attachments:
807B1DDB-86CB-42C0-9EAB-F6A53B687BA2.png
807B1DDB-86CB-42C0-9EAB-F6A53B687BA2.png [ 1.36 MiB | Viewed 2734 times ]
Top
 Profile  
Reply with quote  
PostPosted: August 18, 2020, 9:41 pm 
Offline

Joined: July 20, 2009, 1:16 am
Posts: 143
There are weld-in tube joiners specifically made for roll cages:

Image

That's ^ a small one but they go right up to the biggest size you'd use for a roll cage. Very strong and not expensive.


Top
 Profile  
Reply with quote  
PostPosted: August 19, 2020, 8:40 am 
Offline

Joined: April 1, 2010, 10:26 am
Posts: 468
Checkout my topic viewtopic.php?f=5&t=20387&p
Dan installed slugs into the frame rails so you can bolt on the case, works well.

Graham


Top
 Profile  
Reply with quote  
PostPosted: August 20, 2020, 10:00 pm 
Offline

Joined: September 22, 2005, 10:29 am
Posts: 509
Thanks. That's about how I figured it would be done. I wonder how sanctioning bodys feel about it?


Top
 Profile  
Reply with quote  
PostPosted: August 21, 2020, 7:30 am 
Offline

Joined: April 1, 2010, 10:26 am
Posts: 468
Dan the builder runs a race shop so this is an approved technique. He uses special slugs that exactly fit inside a 1" square tube.

Graham


Top
 Profile  
Reply with quote  
Display posts from previous:  Sort by  
Post new topic Reply to topic  [ 7 posts ] 

All times are UTC - 5 hours [ DST ]


Who is online

Users browsing this forum: No registered users and 10 guests


You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot edit your posts in this forum
You cannot delete your posts in this forum
You cannot post attachments in this forum

Search for:
Jump to:  
POWERED_BY