 Black Bear Construction Co., Inc.
Trestle and Bridge Building Supplies for the Model Railroader |
|
Scale Size:
40' Tall x 120' Long
Actual Size:
3" Tall x 9" Long
Typical Bent Spacing:
12' to 15' (.9" to 1.1")
Look at the Materials Pack
|
|
|
Black Bear Trestle Jig, TJ-D5LN
Double Track, Standard Gauge, N Scale
|
|
This models the five-leg trestle in a double track design. When used with two Black Bear TJM-5LN Materials Packs (purchased separately), it builds a 40' tall x 120' long, double track trestle.
The bents may be built in the pile design, where the legs extend all the way from the top cap down into the ground, or in the frame design where the legs rest on a sill at the base. The jig includes a sliding leg cutting guide that makes it easier to cut the frame bent legs.
| TJ-D5LN |
|
Purchase the N Scale, Double Track Trestle Jig
|
|
| $29.95 |
|
| TJM-5LN |
| $8.15 |
| TJN-N |
| $6.00 |
| Purchase additional N scale items from the N Scale Price List |
|
|
BENT ASSEMBLY
|
|
Black Bear DOUBLE TRACK trestle jigs make it even easier to build double track trestles. The center-to-center track spacing has been set after considering (1) the NMRA Standards for straight and curved track, (2) additional space to allow for handling, coupling and un-coupling, and (3) modular standards.
Jig Details
|
W = 4.2"
H = 3.75"
Nominal Track Spacing = 2.375"
|
HO Scale Jig
|
- Laser cut acrylic with 1/4" thick base and 1/16" top plate.
- Builds standard gauge, double track, N scale trestle bent.
- Easily cleaned with soap and water.
- White glue does not stick to the jig.
- Slots work with 3/32" x 3/32" wood.
- Clearance hole keeps glue away from the jig and lets you clean the glue joints front and back.
- For taller trestles, extend the legs out the end of the jig.
Instructions
This jig comes with all the instructions, drawings, and documentation that is included in the standard Five Leg jig.
Look at the Drawings that come with this Jig.
Page 1
Page 2
Page 3
Materials Pack
Wood is supplied in bulk - 24" long pieces. That makes it easier to build long and tall trestles. There is enough bracing material to install diagonal braces and girts throughout the trestle. If you want to build a double track trestle twice as tall, buy four materials packs. You can buy as many materials packs as you need without having to buy another jig.
NBW Pack
NBW's are not included with the kit. An NBW Pack (TJN-N) for N scale trestle kits is available under N Scale Kits > Accessories. It will take about two NBW packs for the double track trestle shown above.
Track-Track Center Spacing
National Model Railroad Association (NMRA) Recommended Practices (RP's) specify minimum center-to-center track spacing for a variety of car lengths and radii. The RP's also specify a minimum "Easy Handling" center distance for uncoupling, etc. The table below presents a summary of these minimum track spacings.
| NMRA Recommended Track Spacing - N Scale |
|
Car Type
|
Minimum
Easy Handling
Spacing |
Minimum
Parallel
Track
|
Smallest
Feasible
Radius
|
Curved Minimum
Center-to-Center
Track Spacing
|
|
Short Cars
|
1.1875"
|
1.0312"
|
10"
|
1.25"
|
|
Long Cars
|
1.1875"
|
1.0312"
|
17"
|
1.4062"
|
|
|
Track spacing may be adjusted wider or narrower than the nominal to accomodate different modular standards or meet other requirements.
|
Nominal Track
Spacing = 1.5"
|
|
| Materials Pack Bill of Materials, TJM-5LN |
| Prototype Size |
Fractional Inch Equivalent |
Qty of 24" Pieces Enclosed |
| 12" x 12" |
3/32" x 3/32"* |
6 |
| 3" x 8" |
1/64" x 1/16"* |
14 |
| 8" x 18" |
1/16" x 1/8"* |
3 |
| 2" Shim for Stringers |
.010" x .030" Styrene |
14" |
| Small Rubber Bands |
Approx. 10 |
| *Size shipped with Materials Pack. |
|
PO Box 26911
Austin, TX 78755-0911
(512) 467-8400 FAX:(512) 985-5110
|
