Subject:
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Re: Another Technic Creation
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Newsgroups:
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lugnet.technic
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Date:
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Tue, 21 Nov 2000 02:27:25 GMT
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Viewed:
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2364 times
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In lugnet.technic, Mark Cogan writes:
>
> Unfortunately, as far
> as I can tell, the only way to do it its to only switch modes when the
> wheels are all straight.
I came to exactly the same conclusion. I hope we are both correct!
> I can, of course, see an easy algorithm for
> handling automatically switching to crab mode and back, but I can't see
> any way to implement it mechanically (at least, without motors and
> (perhaps) an RCX).
A pure mechanical solution, which would work with 4 wheel steered vehicles,
with each axle being steered to the same (or opposite) angle such as the one
you describe, is to arrange the gearstick or gears so that they can only be
shifted when the wheels are straight. This would in fact be fairly
straightforward to do, either by a simple "notch" type mechanism coming off
the pinion on the steering, or a "notch" coming from a liftarm attached to
one of the axles driving the steering which happens to be close to the
gearbox... I'm sure there are many ways to skin this particular cat.
Jennifer Clark
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Message has 1 Reply:
 | | Re: Another Technic Creation
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| Well, I've been thinking about this, and I think it's possible to do with an arrangement like the valve gear on your everyday steam engine. This would allow it to be changed with the wheels in any position. Implementing this, however, is not trivial (...) (24 years ago, 21-Nov-00, to lugnet.technic)
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Message is in Reply To:
| | Re: Another Technic Creation
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| Jennifer Clark wrote: [] (...) I've been toying with this -- mostly on paper -- as well, in attempt to convert my 8448 to four-wheel dual-mode steering. Unfortunately, as far as I can tell, the only way to do it its to only switch modes when the (...) (24 years ago, 20-Nov-00, to lugnet.technic)
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