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08-22-2007, 07:50 PM | #1 |
RCC Addict Join Date: Aug 2006 Location: trying to find out what a TVuPer is.....
Posts: 1,851
| More on Tuber Construction....
Quick tech thread here. I mentioned in another thread about "building a tuber right". A few people asked me what I meant when I said that. Well.... When you are building a tube chassis, be it 1:1 or 1:10- alot of the same rules apply. Strength is the main concern when designing and building a tube chassis, not just strength of the welds (which is important) but strength of the chassis as a whole. I was told once, never let a tube end. That is the simplest rule when building strength into a tuber. When a tube ends, say half way through an adjoining tube, all the force will be placed on that single tube and in a crash situation; that tube will fail. Now if you continue that tube on, the force will be displaced throughout the whole chassis.. thus adding strength. Here are some pics. Picture of the chassis. Now with colored lines drawn the illustrate my point. With the lines drawn, you can see where all of the force would go if there was a crash. This chassis is not perfect. There are a few points where tubing ends (where the purple and blue come together on the side) But for the most part every color leads to a common point. For me, this also helps the overall look of the chassis. It looks alot smoother and easier for my eye to follow. Confused yet? good, now go build. |
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08-23-2007, 06:47 AM | #2 |
I wanna be Dave Join Date: Dec 2006 Location: Goin broke losing weight.....
Posts: 2,262
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Looks very good. I was curious how some do dual bends, such as on your main down hoops. Do you lay the piece over something to bend both at once. or do you do each side one at a time? In case thats not clear, I mean the bends from front to bach, not across the chassis.
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08-23-2007, 07:52 AM | #3 | |
RCC Addict Join Date: Aug 2006 Location: trying to find out what a TVuPer is.....
Posts: 1,851
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08-23-2007, 08:05 AM | #4 |
Rock Crawler Join Date: Mar 2004 Location: Where it's wet
Posts: 833
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That looks pretty much indestructible. The X at the rear of the seats looks sweet |
08-24-2007, 10:52 AM | #5 |
I wanna be Dave Join Date: Dec 2005 Location: between heaven and hell.
Posts: 3,367
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great info mr. pink and the illustration explains your comments very well. It's interesting to see how others build or their out look on building tubers are. I find it fasinating(sp) and you do build some nice tubers. |
08-24-2007, 11:51 AM | #6 |
Rock Stacker Join Date: Jul 2007 Location: Fayetteville
Posts: 50
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Very Nice work.
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08-24-2007, 12:09 PM | #7 |
Newbie Join Date: Jul 2007 Location: Hillsboro
Posts: 46
| Very detailed work I must say. I tried that google sketchup it was hard as hell ,but fun.
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09-04-2007, 11:08 AM | #8 | |
Rock Crawler Join Date: Jul 2005 Location: Central Coast
Posts: 667
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I eyeballed the entire tuber I built myself (and it came out decent), but the compound bends were minimal. I had two tubes that had 3 bends, everything else was 1-2 bends. | |
09-15-2007, 03:39 PM | #9 | |
Rock Crawler Join Date: Feb 2007 Location: Ramstein Air Base Germany ...ya Ive been Ramshafted
Posts: 567
| Quote:
I use 2 different types of tube benders and different methods of trueing my frame as I build. Eyeball method and homebrew jigs and some other tools like levels and squars. I like to eyeball stuff mostly and then I check it, I know this is a somewhat backwards way of fabricating but its kinda an art way of doing it especialy if your building from the plans in your head and not paper. Also I use different sizes of graph paper to do some of my stuff, if you look at my tuber build there is a couple of pics with the center piece of the frame outlined on the graph paper. Basicaly after measuring the tlt axles and looking up the regs on length / width/ hight for comp use I put it on the graph paper in pencil as a type of blue print in a way and then bend my tubing to fit the drawing. Then for other parts of the fram were I had to make a right and a left part I would bend one piece, eyeball it to see if it would work and look right and then take that piece and trace it on the graph paper and bend the second piece to fit that. It works for me so maybe that will help you ! Last edited by CCFBERG; 09-15-2007 at 04:09 PM. Reason: add | |
09-18-2007, 10:39 PM | #10 |
Pebble Pounder Join Date: Sep 2007 Location: Vancouver
Posts: 177
| I've been building full scale drag car, 4x4, circle track chassis, roll bars, roll cages and other various 'tube' creations for 15 years. Most of it as a hobby, but for a while it was my occupation. I've been using that rule of thumb since day one but never had a good way to explain it to somebody else. That is brilliant! Thank you. |
09-19-2007, 12:23 PM | #11 | |
I wanna be Dave Join Date: Dec 2005 Location: between heaven and hell.
Posts: 3,367
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On "normal bends" I do it one at a time and eye ball it. I also use an angle finder, a carpenters square and measuring tape to match parts if I've had to braze it before making it's match or just to make sure the body is square. You'll never see a "perfect" tuber this size. You'll see little imperfections here and there. IMO.. I've had my hands on other's tubers than just my own and they have their own quarks. | |
09-19-2007, 12:30 PM | #12 | |
RCC Addict Join Date: Aug 2006 Location: trying to find out what a TVuPer is.....
Posts: 1,851
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As long as the suspension cycles nicely and everything fits- it will crawl. All the other work is just to make it look nice for pictures. | |
09-19-2007, 02:40 PM | #13 |
I wanna be Dave Join Date: Dec 2005 Location: between heaven and hell.
Posts: 3,367
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Yep what he said. I had my hands on a couple "production" tubers and found all sorts of things on it, that I personally wouldn't have let go. But it works and that IS "the bottom line". |
09-19-2007, 05:32 PM | #14 | |
Rock Crawler Join Date: Feb 2007 Location: Ramstein Air Base Germany ...ya Ive been Ramshafted
Posts: 567
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I use graph paper to do duplicates that way I can lay down the first one trace it out and then lay the next down, mark it and bend away! Also graph paper can help aslo if you ned to figure out angles, draw them out to scale and then bend your tubing accordingly, check out this thread and you will understande what I mean! This is my current build= My Tuber build, Hydraulic Steering, Custom Hubs, Front Dig with Disk Brake, lots of p | |
09-19-2007, 05:35 PM | #15 |
Rock Crawler Join Date: Feb 2007 Location: Ramstein Air Base Germany ...ya Ive been Ramshafted
Posts: 567
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I did let one tube "end". It didnt at first but I had to chop it to make room for something! Stay tuned I got tricks! he he |
09-19-2007, 05:38 PM | #16 |
Rock Crawler Join Date: Feb 2007 Location: Ramstein Air Base Germany ...ya Ive been Ramshafted
Posts: 567
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Oooops just realized I already posted on this ha ha! Im all hopped up on mountain dew right now |
09-21-2007, 05:32 PM | #17 |
Newbie Join Date: Aug 2007 Location: Oly
Posts: 36
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This is some great tech. I can't wait to get started on my AX tube frame.
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