Author Topic: car derived sxs  (Read 52071 times)

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Offline Yummi

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Re: car derived sxs
« Reply #30 on: July 18, 2018, 01:53:22 PM »
I suppose you did see the suspension arms are tigged?

I just asked re: Chassis.  Hope they respond.
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Offline Yummi

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Re: car derived sxs
« Reply #31 on: July 19, 2018, 06:09:19 AM »
I just asked re: Chassis.  Hope they respond.

And they did.  Not a lot of detail, but some insight. 

Quote
Good Morning Jeffrey,

We use bronze welding because it has very slight flex in it as you say. It also induces less localised heat in the tubes, increasing strength.

Regards
 
Henry
 
Henry Siebert-Saunders
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I like things that move.   Pretty much limits me to cars and strippers

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Offline Baloo

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Re: car derived sxs
« Reply #32 on: July 19, 2018, 06:52:08 AM »
so I finished stripping the golf down as far as I could, decided for the time being I would use the golf front subframe in the back and another up front



Offline Baloo

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Re: car derived sxs
« Reply #33 on: July 19, 2018, 06:57:35 AM »
that gives me the position for the wishbone pick up points but not the strut tops
so

weld a couple of discs in the suspension tops to give me a 12mm hole like thus



and use these to capture the position for the strut top



wheelbase is set at 2100mm which is the shortest I could fit into with legs out straight



base layer will have to be 2" box section for now but I am treating this as a prototype and will make another after ironing out all my mistakes lol


Offline Baloo

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Re: car derived sxs
« Reply #34 on: July 19, 2018, 07:03:55 AM »
onto the work bench and I can see where the suspension tops need to be
just need to copy over the engine mounting position in the same way  and I can get rid of the old body shell I keep tripping over


Offline fabr

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Re: car derived sxs
« Reply #35 on: July 19, 2018, 09:24:19 AM »
I just asked re: Chassis.  Hope they respond.

And they did.  Not a lot of detail, but some insight. 

Quote
Good Morning Jeffrey,

We use bronze welding because it has very slight flex in it as you say.I have brazed a lot of things in my fabbing life and I would only use brazing on sheetmetal ,never in a structural application . Yes,I an agree that it allows a very small amount of flex but it is that flex that will allow the bronze or brass filler to fail much sooner than a weld. It also induces less localised heat in the tubes, increasing strength. Reading between the lines of that they are saying that less skilled welders are needed to assembly the frame. They are using thin wall tubing that can ,with a lesser skilled laborer,induce way too much heat into the weld creating a much larger HAZ(heat affected zone) that is not a good thing.

Regards
 
Henry
 
Henry Siebert-Saunders
There is a reason the suspension is tigged. Plain and simple it is because it is the much stronger joining practice. Lots of new cars are using sil bronze brazing on sheetmetal bodies/built up structures as is used in unibodies and it is a better method than welding or spot welding of thin sheetmetal for that application. 
"There can be no divided allegiance here.  Any man who says he is an American,
but something else also, isn't an American at all.  We have room for but one
flag, the American flag... We have room for but one language here, and that is
the English language... and we have room for but one sole loyalty and that is a
loyalty to the American people."
Theodore Roosevelt 1907

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Offline fabr

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Re: car derived sxs
« Reply #36 on: July 19, 2018, 09:28:42 AM »
onto the work bench and I can see where the suspension tops need to be
just need to copy over the engine mounting position in the same way  and I can get rid of the old body shell I keep tripping over


Back to your topic,baloo,it looks like you have a good game plan . I'm really interested in the results. I had envisioned a slightly longer wheel base for high speed stability. That brings up the question of what is your anticipated speed range for this project.
"There can be no divided allegiance here.  Any man who says he is an American,
but something else also, isn't an American at all.  We have room for but one
flag, the American flag... We have room for but one language here, and that is
the English language... and we have room for but one sole loyalty and that is a
loyalty to the American people."
Theodore Roosevelt 1907

-----------------------------------------------------------
 " You have all the right in the world to believe any damn thing you'd like, but you don't have the right to demand that I agree with your fantasy"

Offline Baloo

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Re: car derived sxs
« Reply #37 on: July 19, 2018, 12:25:43 PM »
speed range, well probably not that fast  I was never a racing driver I think about what could go wrong to much lol
don't think I will be the high side of 60 very often at all,  the only place I have to ride is my track which is tight and twisty  so was aiming for a short wheelbase to make it turn quick and be nimble,  will be registered for road use as well so  that's when it will see the higher speeds I guess

i see this as a prototype and making a revised version staright after this, a second golf has found its way to me via ebay already
just couldent say no to a VR6 4wd version for $300, looking to evealuate the first one which is an 1800cc turbo  the audi 20v engine against the second one which is 2.8 normaly asperated ( for the moment )  should be an intereesting comparison  and of course it will be 4wd


« Last Edit: July 19, 2018, 12:35:01 PM by Baloo »

Offline Baloo

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Re: car derived sxs
« Reply #38 on: July 21, 2018, 12:24:30 PM »
found a bit of time to work on the buggy first job was to copy over the engine mounting positions






then I needed to work out how to bolt the golf subframes into my chassis












« Last Edit: July 21, 2018, 12:26:39 PM by Baloo »

Offline Baloo

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Re: car derived sxs
« Reply #39 on: July 21, 2018, 12:25:29 PM »
pics went a bit out of order but you get the jist of it

Offline fabr

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Re: car derived sxs
« Reply #40 on: July 21, 2018, 04:26:07 PM »
OK baloo,ya got me. What is the splined shaft through the green panel? Steering shaft? 
"There can be no divided allegiance here.  Any man who says he is an American,
but something else also, isn't an American at all.  We have room for but one
flag, the American flag... We have room for but one language here, and that is
the English language... and we have room for but one sole loyalty and that is a
loyalty to the American people."
Theodore Roosevelt 1907

-----------------------------------------------------------
 " You have all the right in the world to believe any damn thing you'd like, but you don't have the right to demand that I agree with your fantasy"

Offline Baloo

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Re: car derived sxs
« Reply #41 on: July 21, 2018, 11:54:03 PM »
yep its the steering column coming through the floor.

I still see this as a prototype chassis one to use to see how to do it better, like that steering shaft nice neat hole in the floor which should have a rubber grommet to seal out the water BUT when I fit the uj its right where the floor is so I will have to have a much bigger hole that hard to seal
the floor should have been an inch higher or lower but of course I didn't know that till after I had made that bit lol
I am not a great designer from scratch but I can take something that exists and improve on it, like everyone probably,


also the front floor looks a bit odd as its curved upwards, this is where the pedals are going to have to be so they might be a bit higher than normal, I thought that might feel a bit odd with your feet up higher but I just looked at how racing drivers sit, they seem to manage



like I say I might finish this frame hang all the bits on it then step back and see what needs tweaking to make it better 

Offline fabr

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Re: car derived sxs
« Reply #42 on: July 22, 2018, 08:47:01 AM »
You have my interest/attention.
"There can be no divided allegiance here.  Any man who says he is an American,
but something else also, isn't an American at all.  We have room for but one
flag, the American flag... We have room for but one language here, and that is
the English language... and we have room for but one sole loyalty and that is a
loyalty to the American people."
Theodore Roosevelt 1907

-----------------------------------------------------------
 " You have all the right in the world to believe any damn thing you'd like, but you don't have the right to demand that I agree with your fantasy"

Offline dsrace

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Re: car derived sxs
« Reply #43 on: July 23, 2018, 03:42:58 PM »
i like the shell emblem in the pic.
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Offline fabr

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Re: car derived sxs
« Reply #44 on: July 24, 2018, 11:56:37 AM »
Won't that seating position be a bit,wellllll,uncomfortable off road.
"There can be no divided allegiance here.  Any man who says he is an American,
but something else also, isn't an American at all.  We have room for but one
flag, the American flag... We have room for but one language here, and that is
the English language... and we have room for but one sole loyalty and that is a
loyalty to the American people."
Theodore Roosevelt 1907

-----------------------------------------------------------
 " You have all the right in the world to believe any damn thing you'd like, but you don't have the right to demand that I agree with your fantasy"

 

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