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November 2001 - Page 35


also came from the factory with diamond tread roofwalks. Since Plano does not make a diamond tread roofwalk for the 4750, two #78s, for a 2-bay ACF car, were used for the roofwalk and coupler platforms with the risers and the crossover frames from #83. Start by cutting apart each #78 roofwalk. Figure 3 shows the cutting locations. The only tool that I have found that cuts the roofwalk cleanly is cuticle scissors. Work slowly using the joint lines as your cutting guide, sanding square after cutting. The sides of the panels near the ends will need to be sanded smooth to remove the end walkway panels cleanly (see Photo 6). Fill the holes in the roof for the kit-supplied roofwalk with green putty, sanding s mooth when dry. Do not fill the holes located next to the roof trough for the hatchcover hinges. The Plano template is correct except for the braces under the walkway e xtension (left-front corner and right-far corner while looking at the roof from either end). Planos template shows a #3 roof support mounted parallel with the carbody. This is incorrect for these Santa Fe cars as each w alkway extension has its two supports mounted perpendicular to the carbody. Also, the wider #1 supports are mounted under where the prototype roofwalks are spliced t ogether. Plano has modeled this option very well, but make sure you first place the A-panels over the template. Relocate the #1 support lines and tic locations to match under the splice points while keeping the roofwalk centered. You may also need to recenter the #2 support lines and tic locations between each of the #1 support lines. Place this marked-up template on the roof, aligning straight along the edges, and tape into position. Press a drill pilot hole using the Plano-supplied T-pin on each tic of the paper template. Then, remove the paper template and repeat for the opposite side. W hen completed, drill at each pilot hole with a #78 drill bit. I did not use the brass template at all for crossover frames, so no holes were drilled. Install the roof, making sure it is mounted with the locator holes for the hatch hinges on the left when looking at the brake end. On the Santa Fe cars, the roof does not overhang the cars end, but is flush. Trim the roof flush with the car ends, being careful not to remove the body vents. Fill any gaps where the roof meets the car ends with green putty, sanding smooth when dry. You may need to ream some of the riser drill holes clear after sanding. The InterMountain kits come with two different sets of hatch covers. The Santa Fe cars were delivered from the factory with ribbed hatch covers, but many later cars also have a combination of ribbed and smooth covers. I decided to model both cars as delivered with ribbed hatch covers. Install the hatch covers and hinges per the kits instructions (see Photo 5). Install the risers from set #83, per the Plano instructions, following the numbers on the template except for the braces under

A

A

B

C

A

A

D

E

Figure 3

5

Roof and hatches installed w ith seams filled and sanded with green putty.

the walkway extension, as previously noted. Use two #3 risers under the walkway extension, parallel with the #1 and #2 risers. The crossover platforms on the Santa Fe cars do not have the center support angles. Instead, diagonal braces were used to support the overhanging part of the crossover platforms. After bending the crossover platforms, trim off the mounting pins and install with CA directly to the roof, making sure to keep the crossover platform centered. Using Figure 4 as a guide, start with one side and one A-panel, place into position with the end halfway on the wide riser with

the etched side lips on top. I secured the roofwalk panels with Cyanopoxy. I used a piece of .030 styrene as a spacer between the panel and the raised hatch area while placing and securing in place. This helped ensure that all the panels were evenly spaced from the raised hatch area. Install the next three A -panels in the same manner. Using the Morton roofwalk from set #83 as a guide, t rim the B-panel walkway extension to match. Secure in place over the end two risers, again using the spacer and with the side lips up. Measure, trim and sand the C-panel to fit and secure in place. The crossover

6
The #78 roofwalk before and after cutting apart one side and end and placement on car. Also note styrene spacer for even roofwalk spacing from raised hatch area.

NOVEMBER 2001

MODEL RAILROADING 35

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