LEGO SYSTEM Trains : 5249


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Subject:	Re: First draft of the Lego-Modular Train layout standards posted..
Newsgroups:	lugnet.trains, lugnet.trains.org
Date:	Fri, 31 Mar 2000 15:22:17 GMT
Highlighted:	(details)
Viewed:	2323 times

Larry Pieniazek wrote: > Precisely what i was getting at, guess I should have read to the bottom. These > lengths matter. Perhaps we need a standard "clearance car" that has to fit. > Anything else is fine as long as it doesn't exceed the loading gauge/clearance > envelope the "clearance car" defines. Hmm, interesting, can one come up with a single car? One thing I immediately wondered is if the clearance specs define a maximum distance between wheelsets (actually between truck pin) and a maximum extension beyond this point, would you get different, non overlapping envelopes between a short car with a long overhang, and a long car with little overhang. Fortuanately, I realized that the longer wheelbase is going to push the overhang further out on a curve than a shorter wheelbase (think of the "angle" the car is making with the track at each truck, the longer the wheelbase, the sharper this angle, and the sharper that angle, the more the overhang sticks out). Of course this degenerate (extremely long) car will actually produce more clearance than is strictly necessary, but it never hurts to have a little too much clearance. One issue though, one probably will want to have a tunnel portal situated in the middle of a reasonable straight section, otherwise it could look real ridiculous (of course if your curve has straight sections interspersed, it will allow tighter clearances). -- Frank Filz ----------------------------- Work: mailto:ffilz@us.ibm.com (business only please) Home: mailto:ffilz@mindspring.com

Message has 1 Reply:

		Re: First draft of the Lego-Modular Train layout standards posted..
(...) Sure - since the specs are being set, a ClearanceCar can be defined. Anyone building a layout that doesn't allow it to clear gets a wedgie ;-) All you need are LWH, and pivot point distances from the ends for the center of the trucks, and each (...) (24 years ago, 31-Mar-00, to lugnet.trains, lugnet.trains.org)

Message is in Reply To:

		Re: First draft of the Lego-Modular Train layout standards posted..
(...) Good point. Perhaps instead of setting a length standard (although that is useful when calculating siding capacity) the standard should speak to the envelope of clearance that must be provided. (there must be 4 studs clearance from the edge of (...) (24 years ago, 31-Mar-00, to lugnet.trains, lugnet.trains.org)

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