Subject:
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Re: B&O V-2 Hudson Steam Engine
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Newsgroups:
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lugnet.trains
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Date:
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Mon, 13 Jan 2003 23:15:28 GMT
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Viewed:
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994 times
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I was wondering where your leading and trailing truck pivot points were. Are
each of these pivot points still between the axles of the respective trucks
or in front and behind? I'll also go back and look at your pics. Would you
mind if I used this approach on my current MOC?
SteveB
In lugnet.trains, Tom Cook writes:
> In lugnet.trains, Shaun Sullivan writes:
> > In lugnet.trains, Steven Barile writes:
> > >
> > > Are your drivers attached to the frame/boiler of the engine or floating
> > > between the trucks? Ben Fleskes uses a method (the one I’ve been using)
> > > where all the drivers are floating between the front and rear trucks;
> > > pivot-pinned to one truck and pivot-pinned with a front-to-back slip joint
> > > to allow for expansion for around corners. And both attach points have the
> > > freedom to translate up and down along a short axle so it can take uneven
> > > track situations.
> >
> > If I might pipe in, I think that the drivers are indeed affixed to the body ...
> > my experience has been that this is an important feature with a lot of
> > working-piston systems. Having the drivers move means that you either have to
> > (a) have the cylinders move as well, or (b) allow enough slop in the linkages
> > to provide for some relative motion between the drivers and the cylinders.
> > Oftentimes it's easier to simply affix the drivers and cylidners relative to
> > each other, and then provide for some (creative) pivoting of the leading and
> > trailing trucks.
> >
> > -s
>
> Yes, the drivers are attached to the frame, for the reasons Shaun explains
> above and because that's how the real ones are built. By making the pilot
> and trailing trucks pivot closely to the drivers, I was able to keep the
> drivers over the rails at all times. I hope to have ldraw plans completed
> soon to show all the details.
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Message has 2 Replies:
 | | Re: B&O V-2 Hudson Steam Engine
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| OK, look before you post. Now I get it. I was so busy trying to fit what I was seeing into the floating truck solution that it didn't make any sense. Now I clearly see the pivot points etc. BTW can you post a couple pics of it sitting on a curve :) (...) (22 years ago, 13-Jan-03, to lugnet.trains)
| | | Re: B&O V-2 Hudson Steam Engine
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| The pilot truck pivots behind the second axle of the pilot truck and the trailing truck pivots in front of the first axle of the trailing truck. This makes the pivots points as close as possible to the drivers so they do not swing so much. The (...) (22 years ago, 13-Jan-03, to lugnet.trains)
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Message is in Reply To:
| | Re: B&O V-2 Hudson Steam Engine
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| (...) Yes, the drivers are attached to the frame, for the reasons Shaun explains above and because that's how the real ones are built. By making the pilot and trailing trucks pivot closely to the drivers, I was able to keep the drivers over the (...) (22 years ago, 13-Jan-03, to lugnet.trains)
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