Subject:
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Re: Liebherr LG 1750
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Newsgroups:
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lugnet.technic
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Date:
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Sat, 20 Aug 2005 15:16:55 GMT
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Viewed:
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3626 times
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In lugnet.technic, Eric Sophie wrote:
> Hey nice chasis, I like the underside shot where you can see all the steered
> wheels.
For a while now I've been wanting to build a vehicle with multiple evenly spaced
steered axles. The difference this time being that instead of using gearing to
generate the different steering angles required I'd like to use fixed links
instead. My problem is that despite looking on the internet I can't find the
right equations to work out the lengths of the links.
I can work out how much each axle should steer to accurately track around a
single point of rotation, but it's the second part of the maths that elude me.
Does any one know how to do this?
I reckon I'll probably have to use Lego screw threads to get the precise link
length I need, but that shouldn't be too much of a problem.
The chassis will form the first (fixed) link. Each of the two axles I'm
connecting will have it's own steering arm at a ninety degree offset, and then
the final link will connect them.
As each successive axle will turn less, the system will effectively be geared
down as it goes along, requiring less additional energy each time an axle is
added.
Steve
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Message has 2 Replies:
 | | Re: Liebherr LG 1750
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| This model incorporates geared steering (I don't need to tell you how difficult it is to turn the darn thing! If you are to build something as complex and big as this, DO NOT go for geared steering. (19 years ago, 20-Aug-05, to lugnet.technic)
| | | Re: Liebherr LG 1750
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| (...) Well I didnt bother working out the exact lengths, but I found (URL) this technique> works ok. I've since refined it to allow normal steering and crab steering, and anything in between, but have yet to actually complete a MOC using it. ROSCO (19 years ago, 21-Aug-05, to lugnet.technic, FTX)
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Message is in Reply To:
| | Re: Liebherr LG 1750
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| Hey nice chasis, I like the underside shot where you can see all the steered wheels. Hmmm, what are your thoughts on the strength of the center of the chasis? Looks like some more latice work will come in to play when you keep building to keep it (...) (19 years ago, 20-Aug-05, to lugnet.technic)
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