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di48lo
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« on: August 05, 2008, 08:37:59 AM » |
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Hello. My friend and I started to build a Formula 1 race car with a bike engine. I have to design the chasis. This car will not be driven very fast, I'd say no more than 80 mph, but it will have to deal with bumpy roads. So the main feature is safety of course, and rigidity. I need some advice from experts. Just looking at these pictures, is this chassis good enough? Perheaps it's too complicated? Does it have extremely weak points? edit:      turmite: thanks for warning. imageshack was quite a good server at the time I used it  |
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« Last Edit: August 05, 2008, 03:17:52 PM by di48lo »
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turmite
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« Reply #1 on: August 05, 2008, 11:49:47 AM » |
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Can I gently urge you to remove those pics, post them to photobucket and then paste in the links. I hate to open a pic and have flashing screens tell me what I have one, and then only to close it to find I now have popups on my screen, and that is with two popup blockers! Mike ps be nice to us, and we might be nice to you!  |
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The Kit Cars Forum
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« Reply #1 on: August 05, 2008, 11:49:47 AM » |
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di48lo
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« Reply #2 on: August 11, 2008, 02:08:50 AM » |
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88 views and no replys? |
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Ferrari Berlinetta
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« Reply #3 on: August 11, 2008, 07:30:21 AM » |
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Hi and welcome to the forum. I would recommend that you buy a book called "Chasis Engineering" it was written by Herb Adams. He goes into a lot of detail on how to design and test a chasis along with setting up a suspension etc. Just looking at a model will only tell if you applied the right technigues such as bracing, triagulation etc. but can not tell you how the chasis will stand up to torsion loading or bending. The book is available at borders and wasnt that expensive. One thing I thought was rather interesting was he shows you how to build a scale model chasis and test that to give you a good idea as to how the real chasis will work. Good luck with your project. Nice 3D modeling job you did there.
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turmite
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« Reply #4 on: August 11, 2008, 10:14:39 AM » |
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di48lo Seems as if you use Rhino! V3 or V4? I wish I could help you, but you can believe me when I tell you, you don't want me engineering you a chassis!  If indeed it is Rhino, go to the user group and ask if anyone can help you do a FEA on it. Bobi, here on this forum might also be of help, depending on when he might appear. Mike |
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Bobi1
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« Reply #5 on: August 11, 2008, 05:38:51 PM » |
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I can't help much here as I do such design work for living, BUT I will try to give you at least some hints.  Judging from the posted renderings I can clearly say that your chassis is near 80% good for that purpose (as structural design), you need to improve some tubes around the feet first. IMPORTANT - build and place a 3D man figure into the model BEFORE even start designing the chassis, in order to ensure that you will leave enough free room for the body, and the visibility too. The feet area in this Formula 1 is VERY narrow even with the original thin carbon-fiber/kevlar walls, so it's near impossible to replicate exactly the same nose with 4 or more steel tubes around the legs. You must widen the shoulders area, too. Hopefully this may help. |
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di48lo
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« Reply #6 on: August 12, 2008, 12:32:52 AM » |
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Thanks for the hints.
I have to redesign the whole back half, but the problem is, this area is not covered by the body and it will be visible. Another major problem may be the lack of cross tubes in the upper and lower part of the chassis, especially at the front wheels. As it is now, it can bend easily.
The shoulder area is only 40 cm wide, it sure has to be wider. At the leg area there's less problem, its 30 cm wide.
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Bobi1
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« Reply #7 on: August 12, 2008, 06:14:04 AM » |
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Thanks for the hints.
I have to redesign the whole back half, but the problem is, this area is not covered by the body and it will be visible. Another major problem may be the lack of cross tubes in the upper and lower part of the chassis, especially at the front wheels. As it is now, it can bend easily.
The shoulder area is only 40 cm wide, it sure has to be wider. At the leg area there's less problem, its 30 cm wide.
Well, you can use sheet planes in all areas where you don't have too much free space for triangulating tubes. It's a common solve of the "no space" problem in sports cars' chassis. Sheet metal should weight approximately the same like a triangulating tube. Personally I combine both sheets and tubes if possible. More weight, but the strength increases several times. |
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di48lo
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« Reply #8 on: September 01, 2008, 08:08:09 AM » |
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FastAndFunky
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« Reply #10 on: October 26, 2008, 03:08:08 PM » |
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Do you offer a chassis design service? |
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Chassisworks
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« Reply #11 on: October 26, 2008, 03:48:09 PM » |
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well, I'll be glad to offer my opinion as a chassis builder, but to design a chassis can be quite involved. You know your goals and vision of what is expected better than anyone, so I'd be glad to help.
The CAD time itself is crazy, so you've already got that part licked.
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Bobi1
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« Reply #12 on: October 26, 2008, 03:54:26 PM » |
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The CAD time itself is crazy, so you've already got that part licked.
Mike, I'm just curious what means "crazy CAD time" Maybe my bad English is what confusing me to understand that term. Thanks PS: Sorry Mike, I used wrong name  |
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« Last Edit: October 27, 2008, 08:52:11 AM by Ultimate > Ethros > Goldie »
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FastAndFunky
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« Reply #13 on: October 26, 2008, 05:28:51 PM » |
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It means a long time
The CAD time itself is crazy, so you've already got that part licked.
Dave, I'm just curious what means "crazy CAD time" Maybe my bad English is what confusing me to understand that term. Thanks |
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Bobi1
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« Reply #14 on: October 26, 2008, 05:32:51 PM » |
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OK, thanks for the reply! |
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The Kit Cars Forum
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