I will trying to bring you up to date on the boxcar build. It seems that there has been a lot of things going on the last few weeks. At any rate, progress has been made on my model.
This post will be a repeat of the roof build since I ended up scrapping the original piece. I didn’t like the spacing of the ribs and the thickness of the material. The curved roof section was formed the same way as the first time using laminations of .010″ sheet styrene. The last lamination (#4) has the ribs marked while the sheet was still flat. I decided to reduce the size of the small stiffening rib to a .020″ styrene rod. I used a scribing tool to create a slot in the sheet. This will allow the rod to drop in while bonding.
The first layer of the rib is .005″ x .188″. I glued a .010″ x .030″ under the strip.
The second layer of the rib is .010″ x .138″. I made a simple jig to position the strip. The jig helps with marking where the final layer will be positioned.
Once the final layer is added (0.015″ x .080″) to the rib. The rib end is shaped with a taper to the end and then rounded.
Next, I drilled a .018″ hole 13″ from the end and centered on the rib. I added .025″ Tichy rivets to each rib.
The drawing shows the details of the Murphy Radial Roof construction.
Next time we will provide some information on the recent Collinsville RPM meet. Protocraft was there representing the 1/4″ scale community in a largely HO/N scale gathering.
Dick Harley sent this picture of our recent visit to the world headquarters of Protocraft. The picture reveals how Norm keeps his prices so low. Import labor from Texas. The workers are Bruce Blalock, Jim Zwernemann and Frank Peacock. Actually, they are well know in the railroad community for their expertise (not packing couplers). Bruce does smile frequently when not in the view of a camera.