Subject:
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Re: All Terrain Crane
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Newsgroups:
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lugnet.technic
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Date:
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Tue, 25 Jun 2002 13:34:10 GMT
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Viewed:
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1748 times
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"Fredrik Glöckner" <fredrigl@math.uio.no> wrote in message
>
> I like the compact design of the tilting steering axle. I notice that
> the axle pivots around the axle used for the pinion. My experience
> with a configuration like this is that the weight of the vehicle makes
> the pinion very hard to turn, due to the friction. Do you find that
> this is a problem?
It was initially a problem, especially since the vehicle is very heavy. The
solution to was use a gear motor geared down by 36:1 which provides enough
torque to overcome the friction and still allows the wheels to be steered
quickly enough even on carpet. Initially it had only been geared down by 9:1
and this stopped working as the model put on weight.
> The same question applies to the driven axle, BTW. I see that the
> axle around which the suspension is mounted, is part of the drive
> train. Does this configuration imply any excess friction to the drive
> train, due to the weight of the vehicle?
Sortof! The trick here is that the suspended rear axle is relatively lightly
sprung and so does not usually bear much of the weight of the vehicle
compared with the fixed rear axle, and so appears to have little negative
effect overall.
Jennifer
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Message has 1 Reply:
 | | Re: All Terrain Crane
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| (...) Ah, yes, I see now that you mention this in the text on the website as well. Initially, I have to admit that I was just looking at the pictures! By the way, I like the solution you've found for securing the rack. The sliding 2x1 beam with (...) (22 years ago, 26-Jun-02, to lugnet.technic)
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Message is in Reply To:
| | Re: All Terrain Crane
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| (...) I like the compact design of the tilting steering axle. I notice that the axle pivots around the axle used for the pinion. My experience with a configuration like this is that the weight of the vehicle makes the pinion very hard to turn, due (...) (22 years ago, 25-Jun-02, to lugnet.technic)
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