The other day I received an email from Robert Leners with a few very useful pictures attached. The lead shot above is one of those pictures. One that that became apparent upon examination of the pictures was that the car used less common 5-1/4″ tongue and groove siding. The board had a false groove in the middle of the board. It one of two sheathing boards recommended by the ARA.
I started the car sides with Evergreen 3.25″ siding. After looking at the parts I decided that it didn’t look right. I once built a FGEX wood reefer with the false tongue and groove “wood”. After searching available materials, I have decided to try a side with .050″ “V” groove sheet. The approach is not precisely right. The prototype would be spaced at .109″ in 1/4″ scale. Two boards of the Evergreen sheet measure .100″ The .009″ difference is significant but when you view the boards on the model it has the right look. I have made my own grooved styrene using a Co-Liner drafting aid and an engraver made to cut a “V” groove. It is a lot of work and at this age I don’t want to deal with it. I will “re-groove” alternating grooves to create a contrast of the real versus the false groove. You can find engraver tools at several online suppliers like http://www.micromark.com and http://www.umm-usa.com
I have added this diagram showing what ARA recommended practice for wood sheathing.
I will be adding new construction details in my next post.