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'Mysterious Moose Mountain' - 1:35n2 - pt.II
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 Posted: Sat Oct 8th, 2016 08:12 pm
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Herb Kephart
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I think that Michael will agree with me that the proportions of the bridge are near spot on, and it has much more detail than most model trusses.

So there (where ?)

Hoib



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 Posted: Sun Oct 9th, 2016 01:03 am
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Salada
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Hello Si,

I totally agree with Herb: 1st bridge is a good representation but a bit too posh/expensive looking/well engineered for an outfit like the MMM RR. Looks too much like an A Class railroad. Definitely ditch the wedge shaped ballast if used as a railroad bridge.

2nd bridge: bin it, or use as a roadway under bridge** as per Woodie.

3rd bridge : looking good for a NG railroad, actually looks quite similar to some on the D&RGW's San Juan extension line.

** you might think this should be "overbridge" but not so. Bridges are named from the Railroads point of view, so a bridge that spans over the track is an underbridge, 'cos the track runs under the bridge. Not a lot of (non) railway folk know that ! May not apply to U.S. useage ??

Regards, Michael

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 Posted: Sun Oct 9th, 2016 01:42 am
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Si.
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" Second picture--are you f*****g kidding???--and ignoring the color even. Shame that they didn't mold it in pink plastic! "

- - - - - - -

" OH WOLFY !! ...
...You mean that mean ol' Herb won't let you paint the new bridge in Bambi & I's favorite colour ? "



;)





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' Mysterious Moose Mountain ' - 1:35n2 - pt.II
http://www.freerails.com/view_topic.php?id=7318&forum_id=17&page=1

' M:R:W Motor Speedway !!! ' - 1:32 Slotcar Racing Layout
http://www.slotforum.com/forums/index.php?showtopic=59295&st=0&a
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 Posted: Mon Oct 10th, 2016 12:29 pm
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Si.
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" 1st bridge is a good representation but a bit too posh/expensive looking/well engineered for an outfit like the MMM RR. Looks too much like an A Class railroad."

Hi Michael

I gotta say, I don't get you on this one.
Surely a bridge is a bridge is a bridge.
It either IS engineered.
OR
It's scrap-metal in the ravine !

The box-art is a bit misleading, since the supports, train etc. are HO scale.

I'll try and get a quick photo of Wolfy standing next to 1 side.
I gotta say, it looks pretty OK to me, more 'light' in 1:35.

It's only a 50ft span, the uprights being 5ft apart from each other.
Mmm...

:moose:

Si.

The railroad did have some cash for about a year or two...
...after the molybdenum-meteorite landed on the mountain !!



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' Mysterious Moose Mountain ' - 1:35n2 - pt.II
http://www.freerails.com/view_topic.php?id=7318&forum_id=17&page=1

' M:R:W Motor Speedway !!! ' - 1:32 Slotcar Racing Layout
http://www.slotforum.com/forums/index.php?showtopic=59295&st=0&a
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 Posted: Mon Oct 10th, 2016 07:28 pm
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Ken C
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Si

Some where in the prototype world, the bridge / gauge combination will be found. One of the books I have show a steel arch bridge, built for standard gauge, the Rly however that used the bridge was a 2ft gauge line.

I like the bridge, waiting to see if Wolfy approves <G>.



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 Posted: Tue Oct 11th, 2016 05:12 pm
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Si.
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As a result of working on rolling-stock, buildings & trackplans all at once...
...although none of these things are actually 'finished', a clearer WHOLE picture is coming together.

Since I am scratchbuilding rolling-stock & have nothing much as yet to run trains...
...the old temptation to bash together benchwork & whack a load of switches down thankfully hasn't been an issue.

So far, I have managed not to waste valuable modeling time on stuff that ends up not getting used.
If I have got 'stuck' knowing how to progress a particular model...
...I've simply set it aside & picked up another one to work on instead.

Coming back to trackplans again recently, has had me thinking more about operations & how to make the most of them.

The tankcars I've been working on, got me thinking that the 2nd major-mover for the railroad will be tankcars of oil, gasoline & water.
Potentialy great for operations, if just 1 small mine needs all 3 commodities.

With that in mind, Hank Hatchet in the Mysterious Moose Mountain carshop, has been on the lookout for further tanks, to turn into new car builds.
I'd like every car on the railroad to look at least partly different to each other, for visual interest.
So a couple more tank types have arrived at the carshop for the new tankcar builds.



This 'shortie' experiment is based on a cut-down Tri-ang tank, of the type I've already used whole, for the 2 tankcar builds so far.

:moose:

Si.




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' Mysterious Moose Mountain ' - 1:35n2 - pt.II
http://www.freerails.com/view_topic.php?id=7318&forum_id=17&page=1

' M:R:W Motor Speedway !!! ' - 1:32 Slotcar Racing Layout
http://www.slotforum.com/forums/index.php?showtopic=59295&st=0&a
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 Posted: Tue Oct 11th, 2016 10:25 pm
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Salada
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Hi Si,

May I suggest you Google -

"Pagosa Junction Railroad Bridge"

"Animas Forks Railroad Bridge"

- scroll through all the separate photos that come up.

These, & others, were replacement bridges because the DRG were running ever heavier trains following the introduction of the K Class locos.
The Pagosa truss bridge replaced the previous trestle that was swept away by heavy flooding.

These bridges were carrying double/triple headed K's and multiple hundred ton consists of up to 90 - 100 cars. Though similar in appearance to yours the girder & riveting sizing is noticeably lighter. So the MMM RR hit pay dirt for a year or so and invested in good 2nd bridge !.

Your latest tank looks great for a water tanker - a mountain top mine will be short of water for sure. Wolfie's lady 'friend' looks a tad too expensive for his wallet.

Regards, Michael

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 Posted: Wed Oct 12th, 2016 10:48 pm
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Si.
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Hi Michael

I checked out the 2 bridges you mentioned.
BOY ! do they look 'spindley' to my untrained eyes !!
Still standing though.
So obviously well up to the job.

I looked at some truss-bridges a few days back.
These were smallish sized road bridges in Pennsylvania.
The website had many photos & was promoting Pennsylvanian historic bridge preservation.
These bridges are apparently quite widespread in the area.

I learned that around the turn of the century & into the '20s & '30s, steel truss bridges were widely built.
It seems due to falling construction costs & that pre-stressed concrete had not quite become the norm yet.
On-site mobile-riveting equipment had made this possible.
I read that as probably meaning, better, smaller, more portable air-compressors ??

( excuse my vague research, I can get totally drawn in to it, if I'm not careful ! )

Anyhow.
The Pennsylvanian small-road trusses, appeared to be BUILT LIKE TANKS to my eyes.
Way more steel & rivets etc. than those two D&RGW bridges.
By comparison they seemed WELL over-engineered, for 'light' trucks & typical road traffic.

Mmm...

On the bridge kit I have.
If the 'overhead steel' is left out, the bridge appears visually much 'lighter'.
I guess more close to a 'half truss', although a bit high for a true 'half'.
I generally appreciate the 'prototype for everything' scenario, it does help avoid ANXIETY !!

I do like the way the bridge at Pagosa Junction is right next to the Depot !
I had kinda imagineered this for Mysterious Moose Mountain, but thought it might not look 'real'.
The alternative was a 50 foot bridge spanning a HUGE CHASM, Indiana Jones style !! ??
Just keep me away from the 'whimsical' Michael ! ... I have an 'unrealistic' magnetism pulling me toward it !!

:moose:

Si.

Question is
Do I burn my bridges ?
DAMN they're steel
Very non-combustible . . . !



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' Mysterious Moose Mountain ' - 1:35n2 - pt.II
http://www.freerails.com/view_topic.php?id=7318&forum_id=17&page=1

' M:R:W Motor Speedway !!! ' - 1:32 Slotcar Racing Layout
http://www.slotforum.com/forums/index.php?showtopic=59295&st=0&a
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 Posted: Thu Oct 13th, 2016 09:06 am
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Ken C
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Si

You mentioned in the HBR&T thread, you were building a
depressed center flatcar. Photo of a DC car I built based on one used on a peat railway in Belarus. Perhaps a bit more car then you are thinking of<G>.

Attachment: IMGP3155.JPG (Downloaded 80 times)



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Ken Clark
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 Posted: Fri Oct 14th, 2016 01:14 am
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Salada
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Si,

To give you an idea on bridge weights don't forget these "spindly" prototypes are from what Woodie would call a 'heavy' NG line, the D&RGW main line. That should give you a comparative guide as to what an MMM bridge would have been like, much lighter & designed on a fag packet.

If you omitted the top level transverse struts you would have a 'through truss' bridge, but I've never seen a full height through truss design. Removing these upper struts & reducing the side truss height would give a 'pony truss' but altering your kit would be almost impossible.

Pneumatic rivet guns came into shipyard use c. 1880s -1890s on; railway shops usually used hydraulic rivet guns(I don't know why the difference).
You are correct that portable riveting only started about 1910 onwards. Rivet guns need at least c. 110-120 psi & a good cfm rate - I've done my share of rivet driving. Air is also a must for the rivet heating coke stove, Any rivet less than white hot in the hole won't be any good.

Your best bet might be No 3, bought second hand when the line was at its peak. A lot of bridges, grades & railroad infrastructure were washed away by torrential floods in, I think, 1908 in Colorado and New Mexico, resulting in steel truss bridges replacing previous trestles.

Funny you should comment on Pagosa Junction as a prototype inspiration, I spent damn near a year researching it as an actual location for myself - the problem was that the depot area was separated from the passing sidings by that ¥$€# bridge - I could not fit it all in along a 11' 8" wall. Chavez Junction is based on Pagosa Junction without the bridge and flipped east-west to make better use of the available space.

Ken - unusual 4 truck wellcar; typical MMM shop build with the outer trucks mounted on inner frame extensions; inspiration for Si ?.

Regards, Michael

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