The prototypes are fitted with a special interior fabric lining and pressurization inlets that allow compressed air to be blown through the load for faster unloading

The Trainz SKU for this item is P12039789

Here is an Atlas 20000565 HO Richmond Frederickburg & Potomac Extended Vision Caboose #901

Model Number: 41021

Athearn G62623 HO Union Pacific GP9 Diesel Locomotive with DCC & Sound #137 ProductID_12107283 The prototypes are fitted withThis is Athearn G62623 UP #137 HO GP9 DCC SND. Its key features are: Genesis driveline with dynamically balanced five pole skew wound motor and dual flywheels All wheel drive and electrical pick up Factory installed SoundTraxx Tsunami sound and DCC decoder Tsunami sounds are compatible with both DCC and DC operation Accurate nub style walkway tread detail Wire grab irons installed Etched metal radiator intake grilles and fan grilles Many prototype