To paraphrase Vane Jones, "Knowledge is of little value until shared with others."

Monday, December 16, 2013

North Shore Line 409 - Part 5 Installing Roof Matts

The positioning of the roof matts will be the hardest addition to the roof to do. Back when the lost wax cast parts for, at that time, the two Clouser NSL cars became available; I purchased a number of each of  them. Little did I know then, the same parts would be used now.

The cast parts were sold under the Wade Model Products line. This is a photo of what must be the earliest packaging of the products. The name of the item is hand written. Notice the price: $2.85.

This is a trial fitting. The sox is holding the casting in place.

To get the castings, one for each end, ready for installation the sprue has to be cut off. This is best done with a cut-off wheel. Once the sprue is removed, file any other excess material off. Bend each casting to conform to the contour of the end of the roof on which it will be installed. 

What is missing from the castings is more of the material mounted on the roof end to which the individual wood slats making up the matt are mounted (nailed). Part of this material is a rail gutter to keep rain off the end door. Styrene strips of the appropriate dimensions are ACC'ed to both castings.

Once the ACC has cured, the roof matt can be positioned on the roof using the "marks" from the original roof matt. Work on one roof matt at a time. Use large, thick rubber bands to hold the casting to the roof. I've been told Bill Clouser used this method to attach the castings to his models. Note the number of rubber bands used from different directions. A thick, slow curing, gap filling ACC should be used. Allow at least 24 hours for the ACC to cure.
I tried to position both roof matts in place and ACC on at the same time. This is hard to do since it's possible to dislodge one roof matt while working on the other. I've used this method before with 3 other Sunset models and have some skill in positioning the matts. I recommend you do one at a time!
As the ACC started to cure, the rubber bands had to be repositioned to bring the outer edges of the matt down to conform with the curve of the roof.

When the rubber bands are removed, part of a rubber band may have been "glued" to the casting. Clean up the casting with a sharp blade, file, and/or fine grit sand paper. After one roof matt has been attached, work on attaching the roof matt on the opposite end.

After both roof matts have been installed on the roof ends, check them to see if additional ACC needs to used to fill any gaps. Don't use too much ACC. The slow curing, gap filling ACC moves slowly. It continues to move until it cures which means it will move down from where it was applied and may fill in areas you do not want filled. If this happens you will need to clear out the unwanted ACC.
The piece of 0.005" brass was used to clear out excess ACC in the 4 areas under the matt between the supports.

The next post will finish the roof.


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