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Krampton Mining & Railroad Company
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 Posted: Thu Dec 26th, 2013 05:59 pm
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Alwin
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Some progress shots of the layout. The background is installed, extra lights are on and the bridge is nearly finished. Only thing to do on the bridge are the abutments.

I've put some buildings temporarily in place to see home it looks.











I know it's already almost over, but still a merry Christmas to everyone.

Alwin

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 Posted: Sat Dec 28th, 2013 12:43 am
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JawboneFlats
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Hi Alwin,
It looks like you've made a lot of good progress on your railroad in a very short period of time. It looks good.

However, there is one thing that I thought I would mention in regards to your bridge. I've built Howe truss bridges so when I saw your bridge it didn't look quite "right" to me. Apart from the actual "truss",  which I know is still under construction and seems to be missing some diagonal parts, the timbers that support the track are a bit different than I'm used to seeing. Maybe at this point a picture would explain more clearly than words.

Here is a photo of a bridge I scratch built in about 1968; it's still hanging in there (so to speak). You can see there are cross-wise timbers that sit on top of the bottom chords of the trusses and they support the track stringers.

Here's a link to a commercially available bridge that shows the same support structure. Now these will pass when examined by a building inspector.
http://www.victorianweb.org/cv/models/apg/rrstructures/11b.html

All that being said, it looks you've still made more progress toward completing your railroad, scenery all all, than I've have in the last 40 odd years at this.

regards,
Dennis aka JawboneFlats
(Soon to be roundly condemned as a nit-pickin' rivet counter...) 


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 Posted: Sat Dec 28th, 2013 10:00 am
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Herb Kephart
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Not when it is being done in a non-critical manner, to help another modeler to achieve greater realism, as you did Dennis.

While the number of rivets across the bottom of a tender would not be correct for a certain prototype, they would have little or no effect on the workings or usage of a real tender.

Critical pieces missing from a bridge would be an entirely different matter.

Herb



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 Posted: Sat Dec 28th, 2013 03:39 pm
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Alwin
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Hi Dennis,

Thanks for you comment but what you said is not quite right. Before I've build this bridge I did some research on truss bridges.
Many truss bridges have a complete cross but that's not necessary. There are also may bridges with only one of the two diagonals of the cross.
Depending on the direction, / or \ , the diagonals are under tension or under pressure.
See also the bridge in this link http://en.wikipedia.org/wiki/File:WaggaWaggaBridgeOverMurrumbidgee.jpg

On the second part  of your comment you say that the support of the track stringers is not right. But also that can be done in different ways, see the following link:
http://www.downtheroad.org/NewZealand/imagesBBB/Winky/IMG_1100.jpg

What I do miss are some diagonals from the side of the truss to the truss to prevent the truss form falling. This can happen when a sideways force is on the truss, like wind or a not perfectly vertical placed truss.

I hope this explains my design of the bridge a little.

Alwin

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 Posted: Sat Dec 28th, 2013 07:55 pm
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Si.
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Hi Alwin

Nice work !!!!!

Cheers

Si.

A friend of mine worked on the Wagga Wagga Daily Advertiser for a while.



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 Posted: Sun Dec 29th, 2013 02:41 am
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JawboneFlats
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Hi Alwin,
Well, I guess my eyes are just a bit too provincial when they attempt to make off-hand evaluations of truss bridge structures.

Honestly, I had not been aware of the Allen truss, although after Googling it, I see that it is a variation developed from the Howe truss. (Also from the web, it is my impression that the Allen truss was primarily used on roads, but I could easily have gotten that wrong.) In my comments I was specifically referencing the Howe truss, and when I said your bridge "didn't look quite 'right' to me" and that "the timbers that support the track are a bit different than I'm used to seeing", those are actual facts based on my experience with the Howe truss bridges. Please excuse my ignorance.

Thanks for the explanation. Keep up the good work.

Regards,
Dennis aka JawboneFlats

Last edited on Sun Dec 29th, 2013 02:43 am by JawboneFlats

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 Posted: Sun Dec 29th, 2013 06:31 am
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Milocomarty
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Think that will be a spectaculair scene when done Alwin !



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 Posted: Sun Dec 29th, 2013 03:23 pm
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Alwin
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Thanks guys.

Dennis, no problem. During my research over the internet I found some more truss bridge types. Some only for steel as building material others also can be made of wood.
I also found some Allen truss bridges wich are used for railroading like this one:
http://www.flickr.com/photos/42pix/573428853/in/photostream/
But you're right, most railroad truss bridges are Howe trusses.

Alwin

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 Posted: Sat Mar 22nd, 2014 06:58 pm
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Alwin
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Finally an update. I've been working on the scenery of one of the modules lately. Added some stones and also the first grasses and bushes. The bushes is a bit trial and error on some different techniques, not all are giving the results that I want.







Alwin

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 Posted: Sun Mar 23rd, 2014 04:43 pm
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Si.
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Hi Alwin

Lookin' good !

Nice colours.

Looks like the LED's are the biz !

That last close up looks like 1:1 to me !

Cheers

Si.



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