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pipopak
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..... requiring lifesavers and lifeboats?
Welcome to the Volks Electric!
http://volkselectricrailway.co.uk/history/the-daddy-long-legs/
Jose.

Salada
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It worked but was eventually wrecked by storms. Anyone fancy modelling it ?.

Regards,           Michael

Lee B
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How could you model something moving through the water like that?
Not that I have an interest to do so, but if I did, I couldn't imagine any way to model the operation of something like this...

pipopak
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RC with batteries probably the only way.
Jose.

Lee B
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Actually, I meant the bottom of this vehicle passing through a realistic 'water' surface on a layout. I can't see at all how anyone could pull that off.

oztrainz
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Hi all,
try this for some off-the-wall thinking -
an electric motor mounted on the upper deck driving bevel gears to a diveshaft running down one of the legs to other bevel gears that drive a driveshaft mounted tranversely across the tracks to the adjacent leg with the wheels being attached to this driveshaft. Repeat at at the other end of the deck to power all wheels.
OR - extend the drive from the motor to the other end and use the same "down the leg" drive arrangement
:)

pipopak
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The mechanical and electric parts are easy. The water part is not because physics don't scale down.
Jose.

Herb Kephart
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Any of our ''open frame''motors will operate submerged so long as the waterdoesn't have enough chemical in solution to become a conductor. The limiting factor is bearing lubrication, The speed of the armature causes a friction which the motor must overcome, but this appears to be a non-factor. Try it with a junk (but operational) motor, in tap water if you don't believe. I have even done it with 110 volt motor submerged in water full of iron grinding dust to prove the point. The motors may rust to the point of failure, but they will run until then.

Another gem of useless information from the

Herb

pipopak
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Actually the drive suggested by oztrains is probably the way to go. Delrin bearings on NS axles for the wheels. So it is doable. And will work. But the water will be the unreal item to deal with.
Jose.

Herb Kephart
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And the long search to scale down water goes on.

Herb

W C Greene
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I have done that! R/C IS the only way to do this, without any cables or other stuff. But yes, water IS NOT SCALE and it just "don't cut it" for being "realistic". OK, now what?

Woodie

oztrainz
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Hi all,
of course you could simplify the drive - Sprockets top and bottom and chain drive between.

Lee B
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You could model it at low tide?

oztrainz
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Now what would be the challenge in that? :bg:

To successfully model something that looks impossible takes an inspired kind of lunacy :Crazy:

The methodology goes something like:-
L::bang::bang::Crazy::!::w::2t::glad:
but perhaps with a few more iterations. ;)

I'd prefer not to add the complication of making a wave machine generating a Force 12 sea state if I had to model this one.:w:

Last edited on Fri Jun 24th, 2016 08:27 pm by oztrainz

Michael M
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When Disneyland's (Anaheim) Rivers of America are drained you can seen the beam at the bottom of the channel that guides the ships. 

http://www.ocregister.com/2010/02/09/disneylands-rivers-of-america-dry/

I think that something close to prototype could be modeled, but not by me.  I model eastern California and western Nevada much of which is desert.  Don't need a lot of modeling skills to glue down some sand and rocks.

W C Greene
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Some years back, I considered building a "for real" small railroad water crossing with a little ferry capable of hauling a little loco or maybe a couple of log cars across a creek. The creek would have been built as a section for an On30 Texas Outlaws modular layout. I bought (and still have) a Tamiya motorized tracked vechile kit with the idea of building the ferry on top of this. The motor unit appears to be "waterproof" so I thought that a little r/c board and battery could operate the thing which would run across the "creek" guided by a "slot car type track" underwater...Si, are you reading this? There would be short approaches on each side of the water way and I imagined that an r/c loco could get on the ferry and cross to the other side or maybe shuttle cars onto the ferry...get the idea? The module itself would be built with this water feature made with maybe waterproof plaster (if there is something like that) or textured with readi-mix concrete for the stream bed. Then the water could be a "muddy" real water tinted with dye so the the tracked mechanism underneath the ferry wouldn't be seen. BTW, the tracked drive is very low profile. This could be set up at shows, etc. wherever the group exhibited their layout. Of course all this would need to be hell-built for stout and no leaking allowed (I think it could be accomplished). Now, imagine such an operation, seems to be a sure "show stopper" if it worked as planned.
AND...using an r/c controlled loco, a real "low water" crossing could be done with the train running across a swampy creek, no ferry needed. I have seen photos of the real thing. And would that work? YES, I ran an r/c Porter in the axle deep water in my kitchen sink and she did just fine!

CRAZY??? Damn straight but then I believe it would work. I have no plans for this now but maybe somebody will bring this outrageous-ness to reality!
I triple dog dare you!

the Original Outlaw Troublemaker

pipopak
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It would be easier to have the ferry run on a rail and pull it back and forth with a string and drum drive hidden somewhere out of the water. Can be fully automated to start, go to the other end into the slip, switch cars or trains as wanted and return to do the whole thing again on the other end. No waterproof mechanisms needed.
Jose.

bobquincy
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Why hide the string and drum drive?  It has (a few) prototypes.
https://en.wikipedia.org/wiki/Elwell_Ferry

pipopak wrote:
It would be easier to have the ferry run on a rail and pull it back and forth with a string and drum drive hidden somewhere out of the water. Can be fully automated to start, go to the other end into the slip, switch cars or trains as wanted and return to do the whole thing again on the other end. No waterproof mechanisms needed.
Jose.


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