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mmmmmmmm
billy - 13/11/04 at 07:28 PM

im thinking of starting off a new build and my dam welding realy sucks, now my m8 said if i use gripfill it will be just as strong, what do you all think?


JoelP - 13/11/04 at 08:16 PM

doesnt sound right to me. try it and see!


Hellfire - 13/11/04 at 08:21 PM

Is grip fill like - NO NAILS - if so, it won't work!


Surrey Dave - 13/11/04 at 08:23 PM

Dont be a 'Silly Billy'...


Peteff - 14/11/04 at 12:57 AM

I'm all for it. Pretend the mig is a mastic gun and try it that way


Chris Green - 14/11/04 at 08:45 PM

I went to an exhibition a few months ago, and there was a Morgan chassis there from their new car.

The chassis was ally box section, with triangular plates pop riveted and bonded with some red glue stuff.

I'll post a pic tomorrow when I'm at work.


andyps - 14/11/04 at 09:52 PM

The Lotus Elise and the latest Jag XJ are glued together - as are many aircraft. Many years ago the rear suspension units on Austin/Morris Princesses were glued on with superglue.


billy - 14/11/04 at 10:14 PM

so the future could be glue then!


JoelP - 14/11/04 at 10:50 PM

i think someones been sniffing it again...


stephen_gusterson - 15/11/04 at 12:02 AM

quote:
Originally posted by andyps
The Lotus Elise and the latest Jag XJ are glued together - as are many aircraft. Many years ago the rear suspension units on Austin/Morris Princesses were glued on with superglue.


really? you sure about that?

the princess was a 70s car. I dont think superglue existed then. hydrolastic units on all BL cars ive ever seen have been conventionally mounted.

atb

steve


Staple balls - 15/11/04 at 12:35 AM

Superglue (Cyanoacrylate) was discovered in WWII, made into a useful form in 1958 by kodak.

So i'd assume it was available to companies in the 70s, if not the general public.

Also, if you do ever cut yourself, you can use superglue to hold the wound shut pretty well


stephen_gusterson - 15/11/04 at 12:42 AM

from seeing your web site links in the past, I can understand why you may have used it

atb

steve


Staple balls - 15/11/04 at 12:45 AM

hehehe.

Fortunately not, mostly ended up using it on cycling injuries that needed stitches.

however, it is great when you cut your hands on sheet metal


Rorty - 15/11/04 at 04:08 AM

quote:
Originally posted by Staple balls
Superglue (Cyanoacrylate) was discovered in WWII, made into a useful form in 1958 by kodak.

So i'd assume it was available to companies in the 70s, if not the general public.

Also, if you do ever cut yourself, you can use superglue to hold the wound shut pretty well


Superglue was part of most medical kits during the Viet Nam war. Soldiers used to glue their wounds together in the field.
Midvives currently use it on some female patients for closing tears in the nasty during childbirth.


Staple balls - 15/11/04 at 04:19 AM

yep, also works well as a threadlock, is used quite a lot in orthopedic surgery and just to finish off, was used for dentistry quite a bit too.


Chris Green - 15/11/04 at 07:56 AM

Here's the chassis pics I was talking about. They aren't actually the morgan chassis, but the chassis of some car-boat thing.

The morgan chassis can just be seen to the left of this pic...
(only just tho).

[img]www.locostbuilders.co.uk/upload/Picture(33).jpg[/img]

[img]www.locostbuilders.co.uk/upload/Picture(34).jpg[/img]

and in the background of this one.

[img]www.locostbuilders.co.uk/upload/Picture(35).jpg[/img]

Please excuse the quality of the pics, they were taken on my phone!

[Edited on 15-11-04 by Chris Green]

[Edited on 15-11-04 by Chris Green]

[Edited on 15-11-04 by Chris Green]

[Edited on 15-11-04 by Chris Green]


Staple balls - 15/11/04 at 07:58 AM






Chris Green - 15/11/04 at 08:02 AM

Cheers Balls.

What did I do wrong?

Regards,

Chris.


Staple balls - 15/11/04 at 08:22 AM

it lies on the photo page

you need to right click the image > properites > then copy the entire url (say, http://www.locostbuilders.co.uk/upload/Picture(33).jpg ) then put it into the [img ] [/img ] tags.


Hellfire - 15/11/04 at 09:19 AM

Sorry to hijack a bit - but....

My lad cut his mouth under his lip a while ago - penetrating right through the skin under his bottom lip. Took him to hospital where is was "Superglued". I asked the nurse/doctor woman if it was the same as the stuff you could buy over the counter. She stated definately not due to the increased amount of cyanide in the conventional stuff.

The medical "Superglue" she said is coloured pale blue.


blueshift - 15/11/04 at 09:31 AM

I wonder if that's the truth, or they just say that to stop you going off and squirting cheap un-sterile superglue into yourself.


Staple balls - 15/11/04 at 09:42 AM

Hellfire is semi-right on this, the stuff hospitals use is called dermabond and apparently is safe for use on flesh, but is also £70 for a 6 pack or so.

But still, personally i think it's mostly b0llocks. i've used superglue for a few years now with no adverse affects. i wouldn't reccomend it unless it's needed, but hell it has to be better than bleeding to death and it's *not* easy to do stitches on yourself.


ned - 15/11/04 at 10:01 AM

I had my chin glued together once when i cut it, the frustration was when the doctor hadn't taken his finger off it quick enough(he was apllying pressure to hold the cut closedx) and his glove got stuck to my face. he had to take his hand out of the glove and cut the tip of the finger that was attached to my face from the rest of the glove. I had a plaster on it for about a week before the new skin grew through and the end of the rubber glove fell off.

Ned.


mackie - 15/11/04 at 10:42 AM

Aww, I've never been glued
When I cut my cheek (don't ask) the nurse just used those stick on Bruce Willis strips (as I call them) on me.

I thought the new Jag XJ was rivetted together? I guess it could be glued aswell.


James - 15/11/04 at 10:46 AM

quote:
Originally posted by ned
I had my chin glued together once when i cut it, the frustration was when the doctor hadn't taken his finger off it quick enough(he was apllying pressure to hold the cut closedx) and his glove got stuck to my face. he had to take his hand out of the glove and cut the tip of the finger that was attached to my face from the rest of the glove. I had a plaster on it for about a week before the new skin grew through and the end of the rubber glove fell off.

Ned.


Lol!

James

[Edited on 15/11/04 by James]


Peteff - 15/11/04 at 11:53 AM

but I couldn't quite put my finger on it till now.
Staple " i've used superglue for a few years now with no adverse affects ". I've seen the pictures mate, nuff said.

Metal bonding adhesives are used in industry but not for joining tubes, they rely on bonding large flat areas usually.


Chris Green - 15/11/04 at 01:30 PM

quote:
Originally posted by Staple balls
it lies on the photo page

you need to right click the image > properites > then copy the entire url (say, http://www.locostbuilders.co.uk/upload/Picture(33).jpg ) then put it into the [img ] [/img ] tags.


Isn't that what I did? The code in my post looks the same as what you've put here?

Cheers!

Chris.


Staple balls - 15/11/04 at 01:43 PM

ahh, sh!t. just twigged you need to be sure they have the http:// on the front (probably)


splitrivet - 15/11/04 at 05:07 PM

Sorry Ned but the thought of you wandering round for 2 weeks with a rubber glove glued to your chin just cracks me up.

Scrounged some clag from a chemical firm I was working at the other day which is 50% stronger than PU. I asked the guy if he had some PU he could sell me (hoping he'd give it me) and he said try this its loads better its called polymer sealant/adhesive.
Sorry to say the firm involved doesnt have a web site.
Cheers,
Bob


ned - 15/11/04 at 05:20 PM

well i'm glad my misfortune a few years back has brightened up someones day a little

Ned.

ps don't fall off a wall at thorpe park and def. don't go to royal surrey hospital


splitrivet - 15/11/04 at 05:28 PM

It could have been worse Ned you might have had a doctor stuck on your chin.
Cheers,
Bob


Hellfire - 15/11/04 at 11:04 PM

<Trying to imagine Ned walking around with the finger tip glued to his face.

I'm still grinning at the thought...

He could have really gone to town and left the full finger of the glove on - you could have written a letter to complain... a french letter.


tigris - 16/11/04 at 01:13 AM

does anybody have a technical name/link to the the type of red glue used on these chassis? Is this stuff available tpo consumers?


type r1 - 16/11/04 at 12:31 PM

peeps,

over 25 years ago, when i was a keen cyclist (had a peugeot racer made from 531 reynolds tubing), a friend of mine had a bike called an 'allen'. it was one of the first aluminium bikes made, and it was held together with epoxy resin and allen bolts.

couldn't a car chassis be constructed using similar principles, i.e. using some sort of adhesive and bolts of some description to join the tubing together?

just a thought.

dom.


Alan B - 16/11/04 at 12:49 PM

quote:
Originally posted by type r1

......it was held together with epoxy resin and allen bolts.

couldn't a car chassis be constructed using similar principles, i.e. using some sort of adhesive and bolts of some description to join the tubing together?

just a thought.

dom.


Yes, of course it could....

However, it would need a complete redesign to utilise the materials and construction technique. Really it would be beyond the scope of most amateur builders, and definitely NOT a replacement method of joining the steel tubes as we currently use.

Interesting discussion, and no doubt someone will step up a be an amateur pioneer in this area.


andkilde - 16/11/04 at 02:33 PM

quote:
Originally posted by type r1
a friend of mine had a bike called an 'allen'. it was one of the first aluminium bikes made, and it was held together with epoxy resin and allen bolts.


I'm going to go out on a limb here and say your friend was both light and slight of build, no?

I remember those old Allen aluminum frames -- my local bikeshop had a couple of them they used as wall art, wouldn't let them out the door on a test ride for anyone over 110lbs.

The rivetted and/or glued monocoque is a great and well proven idea though. It's been the de facto standard for light aircraft construction since the 40's and, before the adoption of carbon composites, was the preferred method for building single seat and sports racers through the 70's and 80's.

A few downsides are:
1) tough to repair after a shunt.
2) have to really have your design well sorted as you can't easily move suspension points around after you've finished.
3) you need some serious engineering skills to design a rigid and durable chassis.

Welded steel tube is still, IMHO, the way to go for the likes of us amateurs.

Cheers, Ted

[Edited on 16/11/04 by andkilde]


type r1 - 16/11/04 at 05:56 PM

ted,

my friend was quite light, but not under 110 lbs. he was about 168 lbs.

i take your point about the technique not really being suitable for an amateur build, though.

what about a welded chassis, but using different materials? how about 304 stainless? might cost more to start with, but doesn't need acid etching and powder coating and wax injection and so on. probably end up cheaper in the long run, eh?

dom.

[Edited on 16/11/04 by type r1]


Peteff - 16/11/04 at 06:26 PM

What does need all that? A locost, wire brushed with a coat of primer and some gloss on it, should last at least 20 years. I think you're getting a bit carried away here.


andkilde - 16/11/04 at 08:56 PM

quote:
Originally posted by type r1


what about a welded chassis, but using different materials? how about 304 stainless? might cost more to start with, but doesn't need acid etching and powder coating and wax injection and so on. probably end up cheaper in the long run, eh?

dom.

[Edited on 16/11/04 by type r1]


Stainless is really quite dear and has a few properties that work against it.

For one it work hardens more readily than mild steel which leads to stress cracks etc. It is also a fair bit heavier. Their may also be some localized embrittlement issues at the weld zone similar to other alloy steels (ie. 4130 which requires heat treat after welding), I'm not too sure on this one though.

I have read that stainless is easier to weld, probably because it's not so likely to be corroded.

I'm certainly not against glued or rivetted construction -- the glued and rivetted floor and side panels of a Locost provide substantial stiffness improvement to the chassis for instance.

I've actually considered building a folded ally chassis myself but the issues around suspension pickups put me off.

Perhaps, taking a page from the Mini, doing a central monocoque tub with bolt on subframes would be a viable project for a homebuilder/designer. Sort of a best of both worlds approach.

Cheers, Ted


type r1 - 16/11/04 at 09:28 PM

paddy,

i guess only time will tell how long your chassis lasts, eh?

dom.


kb58 - 17/11/04 at 01:33 AM

quote:
Originally posted by andkilde

...For one it work hardens more readily than mild steel which leads to stress cracks etc. It is also a fair bit heavier.... Cheers, Ted


Huh? Stainless is the same weight as mild steel. Don't know about the other properties.


krlthms - 17/11/04 at 03:13 AM

The red stuff looks similar to that used in Lotus Elise assembly. However, in the Elise the glue is only used in certain joints; it is not very suitable for joints that experience frequent temperature fluctuations (they become er unglued). Also, the red glue needs special curing conditions (200 degrees C for a couple of hours).
I would think that superglue would not be good for this application because it does not have “body”; it is only good for applications where the joint is a tight fit, such as a broken cup. It is used following episiotomy: the cutting of the perineum (the bit between the vagina and anus) during childbirth. For gluing large, relatively coarsely finished bits of metal I would use some form of epoxy.
Incidentally, superglue is perfectly safe to use on wounds; it polymerizes immediately on contact with moisture. It does give off cyanide gas (hydrogen cyanide); maybe if you burn it. It gives off acetic acid (vinegar); you can smell it the next time you use this glue (don’t get your nose too close).
Coming back to gluing Locost chassis together, have a look at Erwin Dekkers’ site (http://www.geocities.com/MotorCity/7630/index.html); he has built an aluminum framed Locost and used Araldite glue to assemble body parts.


Terrapin_racing - 17/11/04 at 12:36 PM

There are specialised epoxy based adhesives for this type of bonding - the key is surface area. I would not endorse using adhesive to joint 22/25 mm box section steel tube chassis.
If you do, can I watch your first run


DaveFJ - 17/11/04 at 01:15 PM

ref superglue......

here


Peteff - 17/11/04 at 02:21 PM

quote:
Originally posted by type r1
paddy,

i guess only time will tell how long your chassis lasts, eh?

dom.

It'd been on the road 5 years with no problems and no sign of rust so far mate, I think it'll last me out.


MikeRJ - 17/11/04 at 02:48 PM

quote:
Originally posted by kb58
Huh? Stainless is the same weight as mild steel. Don't know about the other properties.


Stainless is 'heavier' (denser) than mild steel, but not by a large margin. Mild steel is around 7.8g/cc, stainless (304) about 8.0g/cc.


Hellfire - 17/11/04 at 03:20 PM

quote:
Originally posted by protofj
ref superglue......

here


Very interesting...