An M.G. Locost Build
views: 6,848

April 30, 2012
Frame Welding

Now that the frame is all tacked together, we've started the actual welding process. It's not going as well as we'd hoped, but we haven't totally messed things up yet either. In fact, some of the welds look really good, and most look decent, if not actually respectable. A few unfortunate welds are sort of embarrassing, but only if you can see them, and we're pretty sure that what the body­work doesn't hide, the angle grinder will. Looks aren't everything, of course. The most important thing is that the metal on both sides of the joint gets melted all the way through. Any additional filler wire needed to accomplish this is therefore fully justified.

  This is your weld bead
click to enlarge

What happens when a weld goes bad is the bead wanders away from the joint. It's the old visibility problem. You lose sight of the joint, stop the torch, flip up the helmet, and curse the welding gods. Another friggen bead gone astray. If the bead runs close to the joint you can pad it with another bead and it still looks okay, just a little wide. If the bead goes off in a whole new direction you have to start over from the detour point and no amount of padding is going to make it look decent. This has actually only happened a few times, but the resulting joint is hard to look at. The Elephant Man of weld beads.

This is your weld bead on drugs  
click to enlarge

But all of the welds are strong enough that we have total confidence the frame will not only be able to handle the weight of the car, but also the stresses of braking, cornering, and accelerating down the Mulsanne straight. Weld strength may be less a result of our fine technique and more a result of having a semi-automatic MIG welder, clean joints, and lots of shielding gas, but the design of the frame gets some credit, too. There are a ton of tubes in this thing, and they're all short. The result is a very rigid frame, no matter how much welding wire you melt onto it.

  Padded bead is luckily on the bottom of the frame
click to enlarge

Our disappointment with the welding has less do with bead quality and more to do with how long it's taking. We figured one day, weld the top, bottom, sides, and we'd be good to go. However, as it turns out, and we might've mentioned this, the frame has a ton of tubes, 75 to be exact, or if not exact then close enough, and each one has two ends. Figure four welds at each end, one per side, and it starts to add up. Some of the tubes are joined end-to-end, so that eliminates a couple of welds, but not nearly enough. You're looking at over 500 welds. That's 500, as in 5 with two zeros after it.

To keep any tubes from heating up too much and thereby negatively impacting the symmetry of the frame, you can't just stand in one place and weld a bunch of joints in the same area. You have to move around. It's best to weld a joint on one side of the car (we get to call it a car now), and the same joint on the opposite side. After welding a pair of joints in front, you move to the rear and do another pair. And if you don't want any resistance in the circuit, and you don't if you want to melt the metal all the way through, you'll move the ground clamp with you. So it takes a lot of time, and that's just the welding part. There's plenty of grinding, wire-brushing, and inspecting between welds, and the little 110v welder needs its rest, too.

The good, the bad, and the ugly  
click to enlarge

Just when it was starting to seem as if the welding would never end, our bottle of C-25 ran out. So now we get to take a break and work on other things. We still need to get the round tubes for the back of the frame bent somehow, and we need to finish up the front shock mounts and radiator mounts. We're also looking forward to building a jig for the front suspension pickups. With the pickups and shock mounts welded on, we can install the front suspension. That would be very cool. I think we'll paint the A-arms this week. And order new wheel bearings.

About

Our Locost
Our Build Plan
Building a Locost
Build Summary
Workshop Manual
Construction Manual
Non-Locost Stuff

Our Build Log

Search log entries

Home       Previous Entry       Next Entry       Latest Entry  
Comments:  
posted October 20, 2016 at 16:17:18  
Thank you ever so for you post.Much thanks again. Cool.
 
posted October 24, 2016 at 03:06:37  
Im obliged for the blog article.Thanks Again. Much obliged.
 
posted November 27, 2016 at 07:10:00  
Thank you for your article post. Much thanks again. Fantastic.  
posted April 28, 2017 at 02:15:43  
I think this is a real great post.Much thanks again. Will read on...
 
posted September 20, 2017 at 11:31:13  
regard, thank you for sharing......  
posted October 11, 2018 at 18:11:50  
Really informative blog.Much thanks again. Fantastic.  
posted December 17, 2018 at 08:57:52  
Yet, much is unclear. Could you describe in more details!  
posted December 20, 2018 at 02:29:45  
Really informative article post. Keep writing.  
posted December 24, 2018 at 12:11:39  
Really informative article post.Thanks Again. Really Cool.  
posted December 24, 2018 at 13:57:11  
I truly love this blog article.Thanks Again and again. Will read on  
posted December 24, 2018 at 14:35:21  
I view something genuinely special in this internet site.  
posted December 24, 2018 at 22:26:12  
Im grateful for the blog post.Really looking forward to read more. Will read on  
posted December 25, 2018 at 00:11:55  
site. It as simple, yet effective. A lot of times it as very  
posted December 26, 2018 at 12:36:15  
Very informative article.Really looking forward to read more. Fantastic.  
posted December 26, 2018 at 14:14:17  
There is definately a lot to know about this issue. I love all the points you made.  
posted December 26, 2018 at 15:54:01  
It as not that I want to replicate your web-site, but I really like the style. Could you let me know which theme are you using? Or was it custom made?  
posted December 26, 2018 at 17:31:56  
Of course, what a splendid website and instructive posts, I definitely will bookmark your website.Have an awsome day!  
posted December 26, 2018 at 19:12:10  
Thanks for sharing, this is a fantastic blog post.Much thanks again. Cool.  
posted December 26, 2018 at 20:52:22  
You made some decent points there. I looked on the net to learn more about the issue and found most individuals will go along with your views on this website.  
posted December 26, 2018 at 22:35:09  
Very neat blog article.Thanks Again. Really Great.  
posted December 27, 2018 at 00:15:38  
There as certainly a lot to learn about this issue. I really like all the points you ave made.  
posted December 27, 2018 at 01:53:18  
Wow, awesome weblog format! How lengthy have you ever been running a blog for? you make running a blog glance easy. The full look of your website is excellent, let alone the content material!  
posted December 27, 2018 at 05:17:57  
Really appreciate you sharing this article post. Cool.  
posted December 27, 2018 at 07:02:47  
We stumbled over here by a different website and thought I might as well check things out. I like what I see so now i am following you. Look forward to checking out your web page for a second time.  
posted December 27, 2018 at 08:46:07  
just your articles? I mean, what you say is important and all.  
posted December 27, 2018 at 10:40:12  
You made some nice points there. I did a search on the topic and found most guys will consent with your website.  
posted December 27, 2018 at 14:41:29  
Spot on with this write-up, I really suppose this web site wants way more consideration. I?ll most likely be once more to learn way more, thanks for that info.  
posted December 27, 2018 at 17:49:54  
This blog is without a doubt educating additionally diverting. I have chosen a lot of useful things out of this source. I ad love to visit it again soon. Cheers!  
posted December 27, 2018 at 20:45:38  
Wow, wonderful blog layout! How long have you been blogging for? you make blogging look easy. The overall look of your website is wonderful, let alone the content!  
posted December 27, 2018 at 22:28:07  
Many thanks for sharing this great article. Very interesting ideas! (as always, btw)  
posted December 27, 2018 at 23:40:19  
Thanks-a-mundo for the article post. Great.  
posted December 28, 2018 at 00:02:17  
Thanks for the article.Much thanks again. Keep writing.  
posted December 28, 2018 at 00:18:36  
Usually I do not read article on blogs, but I would like to say that this write-up very forced me to try and do it! Your writing style has been amazed me. Thanks, very nice article.  
posted December 28, 2018 at 00:30:58  
I see something truly special in this internet site.  
posted December 28, 2018 at 00:42:42  
Im getting a tiny problem. I cant get my reader to pick up your feed, Im using msn reader by the way.  
posted December 28, 2018 at 03:11:57  
There as definately a lot to learn about this topic. I love all of the points you have made.