The unmistakable pitch of a single chime air horn and a Caterpillar diesel engine announce the arrival of Sperry Rail Service car 144, testing for defects along Rio Grande's westward main track at... (more)
A Sperry Rail Service defect detector car takes a breather on a snowy March 1977 afternoon in Rio Grande's Roper Yard. SRS 144 features a CAT diesel motor, a full kitchen, and sleeping quarters fo... (more)
Sperry Rail Service 144 waits on the Craig Branch at Bond for the westbound Rio Grande Zephyr to clear. The view is from the dome of observation-lounge "Silver Sky".
SRS 144 sits in the hole at Yarmony during a met with an eastbound coal behind 5367 5377 5359 5412 and 5364 in February 1982. Having similarities to Victorian Railways 1920s built Petrol (later Di... (more)
Sperry Rail Car clearing the bridge. The engine sounds like a bus diesel engine.
Track Inspection Car Tied Down , Untill Tuesday, Notice Sensors That Check For Rail Defects