Gypsum is a very soft mineral composed of calcium sulfate dihydrate, with the chemical formula CaSO4Â-2H2O.
Gypsum from New South Wales, Australia ...
parts look like new concrete, plastic parts are unpainted
Weathering abilities: ...
Calcium sulfate used to make molding plaster, Hydrocal, and Plaster of Paris. These products are commonly used in model railroad scenery projects.
Ground Through - A mechanical device (usually done manually) which will change the position of a turnout, and simultaneously change the position of the signal mounted on top of the ground through.
- Calcium sulfate used to make molding ...
Hydrocal - U.S. Gypsum Corporation's trade name for its lightweight and very dense plaster.
hard shell — a system for building very thin but extremely strong plaster scenery base using a proprietary plaster called Hydrocal.
Gypsum (USG Corp.), Hydrocal plaster's biggest advantage is its strength. Paper towels dipped in a soupy mix of Hydrocal and applied to a structure of balled paper or interwoven cardboard strips make a remarkably strong scenery shell.
The TVR was originally built to tap the deposits around Plaster Rock. By 1891, only 14 miles of track had been laid down. This was difficult terrain to build on and construction costs began to mount quickly.
The mainline, now near eye level, disappears behind another rise (there are no tunnels in this section of the Caliente Sub) while the NIS branch continues onto the peninsula. The gypsum quarry and PABCO plant are quite discernable on satellite maps, ...
Limestone and clay, and coal, all arrive by rail. Dry cement is packaged and shipped by truck, boxcar, and covered hopper. A small on-site coal-fired power plant provides electricity to the facility and to nearby homes and businesses.
Don't purchase Hydrocal from the hobby store in expensive small containers. Go to a tradesmen Drywall/Gypsum board supply house and buy it by the 100 lb sack for around $10.00!!! Ask them to order it in if they don't stock it. -Fred Penner ...
See also: Train, Track, Scale, Section, Board