9
Fig. 22
Foam Tunnel
Portals
Section 1
A
B
A
B
A B
A
B
Foam
Tunnel
Portals
Section 2
Fill Pieces
Section 4
Section 3
Install Track and Ballast in Tunnel Areas
In a spray bottle, make “wet water” by mixing 2 drops of liquid dish soap in one cup
of water. This will keep Ballast from clumping when applying diluted Scenic Cement.
1. Replace track over entire layout.
2. Pin down sections in tunnel areas and mark outline of track carefully and
accurately. Track should extend 3" beyond Tunnel Portal Placements
(Fig. 17)
.
Remove track outside of tunnel area and set aside.
3. Unpin and remove track pieces inside tunnel area, one at a time. Spread an
even layer of Foam Tack Glue on top of Track-Bed. Place pieces of track on
glue, one at a time, and pin while drying
(Fig. 17)
. Verify a secure connection
between track pieces.
4. Brush diluted Scenic Cement on sides of the Track-Bed. Be careful not to get
Scenic Cement on track. Pour Buff Medium Ballast directly over the track and
ties, covering Track-Bed completely.
5. Brush excess Ballast from top of ties and rails
(Fig. 18)
. Ballast should be even
with top of ties for a realistic appearance.
6. Mist “wet water” on Ballast.
7. Using the Scenic Sprayer set to stream or an eyedropper, saturate Ballast with
diluted Scenic Cement
(Fig. 19)
. Clean rails before use.
Place Foam Tunnel Portals
1. Trace four Tunnel Portal Patterns onto 1/2" Foam Sheet
(Fig. 20)
. Cut out with
hobby knife or Foam Knife. Foam Tunnel Portals provide a stable backing for
Hydrocal Tunnel Portals.
2. Cut pieces of scrap Foam the height of the Riser and/or Incline for Portal
Supports
(Fig. 21)
.
3. Locate Tunnel Portal Positions on Track Plan and pin foam Portals and
Supports in place
(Fig. 21)
.
Fig. 20
Tunnel Portal
Pattern
TUNNEL WALL DIMENSIONS
Tunnel Wall Section 1
A. 6" x 12"
B. 6" x 12"
Tunnel Wall Section 2
A. 6" x 12"
B. 6" x 24"
Tunnel Wall Section 3
A. 6" x 15"
B. 6" x 12"
Fill Piece 6" x 6 1/2"
Tunnel Wall Section 4
A. 6" x 18 3/4"
B. 6" x 12"
Fill Piece 2 1/2" x 9"
Fig. 23
Tops Should
Be Even
Fig. 24
Portal
Fig. 19
3"
Install Tunnel Walls
1. Cut Tunnel Wall Sections from 1/4" Foam Sheets. Cut Sheet in half lengthwise to form 6" tall pieces. Refer to
Tunnel Wall
Dimensions
for individual dimensions and Fig. 22 for placement.
2. Flatten Tunnel Wall pieces with a rolling pin or flex gently back-and-forth so pieces will not break when following Riser contours.
3. Align front edge of Tunnel Walls with inside edge of foam Tunnel Portals and pin in place. Top of Tunnel Walls should be
even with top of Portals
(Fig. 23)
.
4. Form Tunnel Wall to follow contour of Risers and pin in place
(Fig. 23)
. Because Portals protrude slightly beyond edges
of Risers, there will be a small gap between the opening edge of the Portal and the Riser
(Fig. 24)
. Fill this gap with small
pieces of scrap foam or damp paper towels.
5. After Tunnel Wall Sections are pinned in place, there are gaps that need to be filled in. Cut Fill Pieces to the dimensions
noted in
Tunnel Wall Dimensions
. Pin in place as illustrated in
Fig. 22
.
6. Test train clearance and when satisfied with fit, apply Low Temp Foam Glue along seams to secure Portals and Walls.
Remove Foam Nails when glue is set.
7. Paint 6" to 8" inside tunnel entrances with Black Tunnel Paint.
Fig. 21
Portal
Supports
Riser
Gaps
Foam
Tunnel
Portal
