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Tunnel and Gravel Question

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Tunnel and Gravel Question
Posted by HAZMAT9 on Thursday, January 18, 2007 9:44 AM

I've got two questions as I'm finishing up scenery on my MR.  First, how many of you finish the insides of your tunnels.  Not sure if I should finish up the plastering inside or just paint it black and be done with it.  Or better said, how many of you show off your tunnel's inside as part of your layout.

 Question 2: I'm at the point of finishing up my operating drive-in theatre.  Need suggestions on gravel to use for the parking lot.  Wasn't sure if I should use ballast or some other type of "gravel" for this.  Need kind of a bleached out color.  I know ballast does come in various colors just wasn't sure if this would be too course for the lot.  Many thanks!

 

 

Steve "SP Lives On " (UP is just hiding their cars) 2007 Tank Car Specialist Graduate
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Posted by nbrodar on Thursday, January 18, 2007 9:51 AM

1.) I just use black painted cardboard.

2.) I use fine ballast for gravel roads and parking lots.  It work fine in HO.  Although, if you fine ballast for your track, there my not be enough contrast.

Nick

Take a Ride on the Reading with the: Reading Company Technical & Historical Society http://www.readingrailroad.org/

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Posted by Anonymous on Thursday, January 18, 2007 10:30 AM

    dont have any tunnels but on my gravel road crossing on my HO layout i used fine ballast

  use a gray or one thats as white as possible dont use BUFF like i did its too pink

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Posted by jbinkley60 on Thursday, January 18, 2007 1:47 PM
 nbrodar wrote:

1.) I just use black painted cardboard.

2.) I use fine ballast for gravel roads and parking lots.  It work fine in HO.  Although, if you fine ballast for your track, there my not be enough contrast.

Nick

For the tunnel, paint it black, regardless of what you line the tunnel with.  Foam works fine but so does cardboard and other stuff.

For gravel I use Great Northern Sand and Gravel products.  Here's a couple of pictures of a lot.

 

Engineer Jeff NS Nut
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Posted by MisterBeasley on Thursday, January 18, 2007 1:55 PM

I put full scenery in my subway tunnels, but the whole idea was to create the right environment for the video camera in the first car of the subway train.

http://www.youtube.com/watch.php?v=dOV9NSqrQlc

 

I personally enjoy the video camera effect, and as I put more above-ground scenery in, I bring the subway up every now and then and watch the show on TV.  It's a big hit with the spectators, too, particularly the kids.

For my subway walls, I used strips of styrene.  I took a hint from the textured ceiling, and applied Hydrocal with a paint roller, let it dry and painted it with light gray primer.  My tunnels are lighted inside.  The video was taken a long time ago, and since then I've added a couple of bright LEDs to the front of the train to improve the lighting.

It takes an iron man to play with a toy iron horse. 

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Posted by tomikawaTT on Thursday, January 18, 2007 2:32 PM

I recall visiting a club that had two very visible tunnel interiors, protected with plexiglas.  The double track main paralleled the aisle on two different levels.  One had been finished with a rough, 'blasted through the granite' appearance.  The other was finished with a concrete lining, including safety bays.  Both were a couple of yards long, the effect was impressive and only the club members knew that the tracks were on opposite ends of a lengthy main line.

My 'maybe in the future' plan book includes a similar underground diorama of a brand-new bore being cut by an operating TBM.  It'll probably get built shortly after I dock the Emma Maersk at my intermodal port.

Chuck (modeling Central Japan - 200 KM from the nearest salt water - in September, 1964)

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Posted by dwhitetop2 on Thursday, January 18, 2007 4:47 PM
I also model a drive in theater and what I did for my parking lot was simulated asphalt. It worked out pretty well. I tried to weather it up some. I also just paint the inside of my tunnels flat black.      Dave
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Posted by tgindy on Thursday, January 18, 2007 10:28 PM
 MisterBeasley wrote:

I put full scenery in my subway tunnels, but the whole idea was to create the right environment for the video camera in the first car of the subway train.

http://www.youtube.com/watch.php?v=dOV9NSqrQlc

 

From one "traction buff" to another...  Sweet!

Conemaugh Road & Traction circa 1956

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Posted by larak on Thursday, January 18, 2007 10:55 PM

Flat black paint throughout and ballast as far as a spectator can see when looking into the portal.

I even have a surprise or two inside. One disused tunnel has a hobo camp inside. It can't be easily seen unless you look straight in. How about a small sign that says "My, aren't you nosy?"

People like humor and small unexpected things. Be creative. 

The mind is like a parachute. It works better when it's open.  www.stremy.net

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Posted by SpaceMouse on Thursday, January 18, 2007 11:00 PM
 larak wrote:

Flat black paint throughout and ballast as far as a spectator can see when looking into the portal.

For get the spectator, if I scenic as far as I can see with effort.

But I'd never put any humor on my layout. That would be anti-serious, whimsical, non-prototypical caricature.  

 

Chip

Building the Rock Ridge Railroad with the slowest construction crew west of the Pecos.

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Posted by SpaceMouse on Thursday, January 18, 2007 11:01 PM
 larak wrote:

Flat black paint throughout and ballast as far as a spectator can see when looking into the portal.

For get the spectator, if I scenic as far as I can see with effort.

But I'd never put any humor on my layout. That would be anti-serious, whimsical, non-prototypical caricature.  

 

Chip

Building the Rock Ridge Railroad with the slowest construction crew west of the Pecos.

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Posted by KK4EJ-Randy on Friday, January 19, 2007 7:58 AM
Concrete lined tunnel : Use cardboard painted gray and some weathering highlights near the ends, and flat black in the middle to make it "darker" and look longer.

Blasted rock tunnel: Use aluminum foil, crumple it up, paint black and highlight with gray and weather, then trim it to fit over the track.

Gravel : Im sifting material from local sources, mixing colors to create a timeline for the ballast. As the years go by, the ballast weathers, and will probably come from different quarrys, so the colors will change. Older lines will still have some cinders exposed.

Randy McKenzie
Viginia Southern
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Posted by Dave-the-Train on Friday, January 19, 2007 9:12 AM

Can we assume that this is H0?

1. How much you put into your tunnel(s) depends a lot on where they are and what can be seen from all normal viewing positions.

Humour can be fun... BUT you do not want people leaning over to look into the tunnel!  They will catch things with their clothes and limbs. Shock [:O]

You may want to think more about how you are going to do maintenance in a tunnel than how you will scenic it...

You do not want to make a tunnel a dust trap, somewhere nice for bugs/vermin to live or somewhere you have to use an endoscope to do any work in... including just getting out a last car that got uncoupled...

Where your tunnel is somehow close to a viewing face of the layout (like if you have a hidden curve in the tunnel) it cn be fun to be able to look in and see the train in the tunnel through like a horizontal mine shaft.  (Cut in from the front of the board... as distinct from looking in the tunnel mouth)  If you do that it gets to be worth detailing the tunnel wall that you will be able to see.  You will also quite likely want to arrange some illumination... LOW temperature!

About the most important thing is to be able to keep up the maintenance on this part of the layout.

2.

Ballast/gravel road surface.

If you can go get some road surface material and a piece of ballast.  Hold both in your hand and compare all three... then look at the size of the hand on one of the figures on your layout.

Ballast does get degraded and get dirt in it.... BUT it starts out passing through a 2" ring in the screening process and isn't much smaller.  You would not want to walk around a drive in theatre if it were lossely paved with (old) ballast.  (Okay, it's a drive in... ballast cuts up tyres, can be like driving on a shingle beech (or , more likely getting stuck) and when it sprays up is like heavy machine gun ammunition flying about.  You'd get a lot of dented cars and smashed windscreens.  Also the kid deliverying you popcorn isn't going to be very fast or very happy...

Do you get the idea that I'm saying "go small"?

I would suggest treating the surface as being extremely similar to concrete.  It will have been rolled in to a pretty near level solid surface.  Drainage will (mostly) be by un-off NOT run-through - which is the way ballast drains on the track.  I don't suppose that many theatres want big puddles all over...

So I would look at making the surface with very fine sandpaper glued down onto a flat or very-near flat sheet surface (ply?).

Hope this helps.

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Posted by HAZMAT9 on Friday, January 19, 2007 9:24 AM

This is HO scale, forgot to mention that.  I purchased some fine grade ballast in light gray yesterday and it seems to look pretty good.  I do sift my groundcover a second time with a fine strainer and you'd be surprised on how much doesn't make it through the screen.  I went ahead and built up the parking lot humps and just need to cover the lot but not before adding the speaker poles that hopefully I can get to light up.

The two side by side tunnels I have are curved and about two feet long.  The top is made to pop off for maintenance and uprighting derailed cars.  I thought about putting in a hobo camp or something halarious in the tunnel.  The hard part is being able to blend in the pop offs so you can't see any creases or gaps between the top and tunnel itself.  So I went ahead and placed the top on an oversized piece of very thin styrene and blended in the scenery.  Essentially the tops just sit without any adhesion to the tunnel itself.  Thanks for all the great help!  Cool [8D]

Steve "SP Lives On " (UP is just hiding their cars) 2007 Tank Car Specialist Graduate
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Posted by Dave-the-Train on Friday, January 19, 2007 10:38 AM

You might like to look here for a load of stuff on hiding/disguising joints...

http://www.trains.com/trccs/forums/988219/ShowPost.aspx

You could also be in a position to hide the join with a hedge line, possibly with a ditch.  You can even use men (with or without a back hoe) digging a trench...

Tongue [:P]

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Posted by SunsetLimited on Friday, January 19, 2007 12:08 PM
I completely finished the two straight lines down into the tunnel (1- 1 1/2 feet each)with the woodland scenics plaster castings and also ballasted and ground foamed along side, for the back of the tunnel (the curve) i left it open with an access door and just ballasted the track, never had any problems with reaching anything.
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Posted by Bob grech on Saturday, January 20, 2007 1:52 PM

All of my tunnels except one are detailed a few inches past the tunnel portals in order to give the illusion of a solid mountain. For the one tunnel that is visible all the way thru, I used WS tunnel liner castings painted flat black.

 

Have Fun.... Bob.

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Posted by SouPac2 on Saturday, February 10, 2007 12:09 AM
As for gravel and other grainy texture you might consider

1. diatomacious earth. get from swimming pool suppy providers.

2. paint texturing material from building supply businesses.
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Posted by joe-daddy on Saturday, February 10, 2007 12:33 PM

Steve,

An interesting read, especially the tunnel comments as I am builing mine now.

Whew, I built the mountains, really liked them, used some paper rock homemade portals and stopped cold. Why?  I realized I need to 'line my tunnels'.  OK, so I built some 'paper and cardboard' liners.  I fitted them in from the back. Yuk, the paper portals looked awful. ANd the lines were only a bit better.

So I purchased some plaster portals and fitted them to my paper liners. Even more yuk!  So I built some styrene liners and started installing them and the plaster portals.  Ready to glue it down and stopped cold again.  I needed to paint the styrene tunnels which turned out to be no trivial task as the acrylic paint bubbles on dirty plastic. (First time I tried to paint any styrene with acrylic paints you know). OK, painted lets glue. Oh no!  The track needs to be balasted but the roadbed needs to be painted first.  

At that point, I was glad my mountains were light and removable, so off they came, and I started ground up. 

  1. widen roadbed so tunnel liners have no gaps. I use 3/4 masonite strips glued to the sub road bed edges like they do in spline roadbeds to fix narrow places on the roadbed.
  2. Paint roadbed very dark grey
  3. Align track one more time and replace missing ties.
  4. Ballast track all the way past the liner and outside the portals
  5. Check liner paint job
  6. Trimed liners to fit with retaining walls
  7. Paint and weather the portals and retaining walls. What a kick that was!
  8. Glue liner to portals
  9. Glue portals to roadbed
  10. Installed retaining walls
  11. Reinstalled mountains
  12. Plaster cloth repairs to mountain shells
  13. Now ready to so some scenicing.

Never did I realize it was so involved in making mountains and portals and such.  But boy do I like the results.

 I'll post some pictures later, gotta run!

Joe Daddy 

 

 

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Posted by R. T. POTEET on Saturday, February 10, 2007 2:29 PM
 HAZMAT9 wrote:

I've got two questions as I'm finishing up scenery on my MR.  First, how many of you finish the insides of your tunnels.  Not sure if I should finish up the plastering inside or just paint it black and be done with it.  Or better said, how many of you show off your tunnel's inside as part of your layout.



I am not unduly fond of tunnels but I have had a few of them on my (N-Scale) layouts over the years.  None have ever been long enough to swallow up more than a dozen or so cars of a train.

If the tunnel in question is straight I usually put a flat black tinted lining stretching 5" to 6" in from the portal.  I always leave the middle of the tunnel open, at least on one side to facilitate operation of my 0-5-0 switcher.  I don't use as long a tinted lining with a curved tunnel as with a straight one.

I heartily recommend leaving 0-5-0 switcher access into your tunnel.  Bill McClanahan of Texas and Rio Grande Western fame once did a cartoon to accompany one of his magazine articles which showed a character with a fishing pole jabbed into the mouth of a tunnel while he tried to retrieve a derailed car with a fishhook.  Believe me, you have never known the height of frustration until . . . . . . . . . .

 

Question 2: I'm at the point of finishing up my operating drive-in theatre.  Need suggestions on gravel to use for the parking lot.  Wasn't sure if I should use ballast or some other type of "gravel" for this.  Need kind of a bleached out color.  I know ballast does come in various colors just wasn't sure if this would be too course for the lot.  Many thanks!


If you don't use ballast for gravel what are you going to use???

I haven't been to a "passion pit" since 1961 and I'm not sure I ever went to one with a gravel parking area; I will presume, however that they do exist.  I feel that you might be better served creating an asphalt surface.

From the far, far reaches of the wild, wild west I am: rtpoteet

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Posted by mrjimbone on Thursday, March 15, 2007 3:13 AM

On the layout my dad and had we built our mountain against the wall and punched through to the next room for our tunnels. We built a shelves along the wall in the adjoining room for the track, so we only had 6 to 10 inches of actual covered tunnel. The adjoining room was a storage area so normally there was no lights on in it to flood out of the portals. We used a U shaped piece like from a cereal box cardboard painted black inside for the tunnel linings. (Shelves, we had tracks at three different levels going through the wall.)

 For drive-ins I think I can remember two in the Seattle area that were gravel. That sort of pit run (as I know it) maybe 3/4" crushed gravel with a finer gravel bits or sand mixed in. Used quite a bit for asphalt underlayment. When people where leaving after the feature there would be alot of dust in the air and more time was give between the first and second feature than at paved ones. When I was stationed in Colorado, there was one outside Colorado Springs that was oiled gravel, almost like some county roads. Not enough traffic on to smooth it out. I like the thought of painted sand paper for the lot. Would it be to brittle to make parking berms? More hill at the front closer to the screen than the rear by the snack bar, cars closer to the screen had steeper parking angles than those toward the back.

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Posted by bogp40 on Thursday, March 15, 2007 12:23 PM

For very large gravel areas, fine masonry sand or for a finer grit silica sand works. The silica sand being much ligther will take gray washes better if thats the effect you want.

Any time I find areas that will eat up too much expensive ballast, I will spread the sand  first and glue it down. Then the ballast as a top dressing. This is mainly done where there lacks roadbed between double track  and areas of yards where it is too much trouble to add 1/4 filler strips. Some club members have ballasted entire yards with the sand. The important thing is the washes/ staining and top dressing for cinders etc. I like Joe Fugates method of the powdered tempra paint and dilute and let soak into the ballast. I haven't tried this on any large areas yet.

Modeling B&O- Chessie  Bob K.  www.ssmrc.org

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