With the central core of the railroad settling into
operations, I have begun construction of the rest of the railroad. I previously posted on Cascade Summit. http://espeecascades.blogspot.com/2014/07/laying-out-cascade-summit.html
Now, I have begun the mountain climb up out of
Oakridge.
Continuing on from my first foray into spline construction (http://espeecascades.blogspot.com/2014/01/expanding-world.html),
I built supporting benchwork and laid spline up the wall and around the corner
into McCredie Springs. I use
“traditional” spline cut from nominal ¼ inch thick hardboard. Yes, it is messy with the glue, and it takes
a bit of time (each successive spline layer needs to be clamped while the glue
sets), but the results are good and utilize materials easily obtained. The resulting subroadbed has very
natural, flowing curves and is quite strong.
Mountain grade spline
construction.
Around the corner and into the nook, I am building McCredie
Springs on plywood. McCredie
Springs features a standard SP company “village”--train order station, operator
houses, section chief and section crew housing and a signal maintainer’s
house. I will add a rock bunker in
a corner of the nook. Though
quarries in the area were not rail served, there were quite a few. I chose to bend history and add a
rail-served quarry with its rock bunker.
With all of these structures and extra tracks, I chose to use plywood
for the subroadbed to cover the needed space and provide support. The center spline of the mainline
subroadbed keys into a slot cut into the edge of the plywood.
Overview of construction in the Nook. McCredie Springs is on the lower deck
plywood. Two-plus feet above that
is the roadbed for the grade descending from Cascade Summit.
I use Midwest Products cork roadbed. On the spline subroadbed sections, I
sandwich tulle fabric (bridal veil material) between the cork and the
subroadbed spline. This serves as
an equipment catcher during construction and testing. Later, it will serve as part of the scenery. The cork is glued directly to the
plywood where the ply serves as the subroadbed.
Mountain grade up out of Oakridge (off the left). Cork roadbed has been glued to the
hardboard spline. Tulle (veil)
fabric is sandwiched between the roadbed and subroadbed.
Roadbed entering McCredie Springs, up from Oakridge. The rock bunker will be located in the
corner to the right of the photo.
As I laid out McCredie Springs, I eventually went back to
primary research material for the track layout. This was after I had plowed ahead with what I “thought” the
track pattern was. Inspection of
the few historic photos and the SP valuation maps quickly showed I had missed
the correct location of the house track and an additional “track number 3” on
the outside of the curve. I ended
up adding a bit more plywood to expand the supporting “ground.” Lots of splice plates and biscuit
joints were added!
Revised track schematic for
McCredie Springs.
In addition to the revised schematic for McCredie Springs, I
revisited maps for Wicopee and Cruzatte—my remaining mountain sidings. Revised schematics for all three
mountain sidings have been posted into the station schematics tab of this blog.
Continuing upgrade (RR-West) through McCredie Springs. The house track branches off the
mainline to the right. Further
back, track number 3 branches off to the left of the siding.
Benchwork construction techniques are illustrated in the
photos. McCredie Springs sits on
two pair of L-girders plus additional wall brackets. The upper level roadbed rests on simple wall brackets,
reinforced with steel corner brackets.
The corners use a basic box grid with a diagonal brace—better aligned
with the curve being supported.
The mountain grade now features both a descending upper line and a
climbing lower line. The two lines
are about 24 inches apart in height at the RR-West end of McCredie
Springs. They will join on the
turn-back loop that will be supported by Salt Creek Trestle. Salt Creek Trestle is a signature
scene. Photos I shot there are what
I use for inspiration and as the background for this blog.