Subject:
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Re: Adjustable 4 wheel steering
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Newsgroups:
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lugnet.technic
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Date:
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Mon, 27 Nov 2000 10:18:33 GMT
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Viewed:
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971 times
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> I got the idea directly from the valve gear on steam engines. A similar
> linkage allows the single throttle to control speed & direction of the
> engine.
No, it's not a single throttle. Throttle controls volume rate of flow for
steam, valve gear controls cut off (position of piston to TDC when admission is
stopped). Hackworth Valve Gear does not have a curved arm, perhaps take a look
at it, rather than Walcharts/Baker/Stephenson for ideas. (it suffers other
disadvantages when applied to a railway engine, such as being variable because
of springing...but that wouldn't affect this application)
(2 controls in cab directly for power/speed, the reverser& the regulator)
James P
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Message has 2 Replies:
 | | Re: Adjustable 4 wheel steering
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| (...) Interesting subject. I have been trying to simulate a Valve Gear with technic elements and I can say that the Walcharts valve gear is difficult to model because of the curved expansion arm. Any ideas how to do this with Lego elements? BTW a (...) (24 years ago, 27-Nov-00, to lugnet.technic)
| | | Re: Adjustable 4 wheel steering
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| James, I stand corrected!! I haven't investigated steam engines thoroughly, but I used to like taking rides in the old traction engines at shows when I was a kid. And back then I seemed to take a lot more in...... But I do remeber that the driver (...) (24 years ago, 28-Nov-00, to lugnet.technic)
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Message is in Reply To:
| | Re: Adjustable 4 wheel steering
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| Jennifer, Waffling is OK!! I do it all the time!! The reason it should be curved is so that as you adjust the control, the output (link "E") doesn't move. That's why its radius should be exactly the length from "C" to "E". I agree, a bush would give (...) (24 years ago, 26-Nov-00, to lugnet.technic)
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