Monday, October 18, 2021

Cool morning

Mt. Forest Island isn't much of a mountain and these days you would be hard pressed to call it an island. It does, at least, have trees.  

 The land here previously resided where Lake Michigan is now.  When the Wisconsinan glacier melted this was part of an earthen dam that created an area of still water behind it.  This silted in forming much of the land along the lakeshore.  When Chicago was still the Chicago Portage, much of the area was a swamp.  (The wet kind; the political kind came later.)  Shallow standing water was not uncommon at different times in the year and early topo maps showed multiple ponds and sloughs throughout the area.  As such, it wasn't much of a stretch to call the dry areas islands. Mt. Forest was the largest in the area.  To the east is Stoney Island (extending between Worth and Alsip IL) and still further east is Blue Island and the eponymous town which sits atop it.  

Canals, drainage ditches, sewer systems, and pumps have drained much of the land and rendered the island names meaningless...MOST of the time!

Monday, October 11, 2021

Ballast train

Seen on the East Lancashire Railway.

Some of the fundamentals or railroad design haven't changed much over the years.  Rails transfer their load to cross ties/sleepers which simultaneously serve to spread out the load over a larger area and keep the rails at the proper gauge.  All of this needs a stable platform and resting it on dirt would be unacceptable for anything that isn't exceedingly temporary.  Crushed stone ballast is used to create the roadbed and spread around the rails once laid in place.  

Naturally part of maintenance is the replacement or replenishment of ballast along the tracks and railroads have long used special hopper cars to accomplish this.  A train like this (albeit usually a longer one) would have a crew of men with shovels and rakes to spread the ballast while someone manned the gates on the hoppers to dispense the stone as needed.  

Now skip forward to the present day.  A Herzog ballast train has added features Mr. Stephenson couldn't have predicted.  

Those solar panels are a clue that these cars are more than just mechanical devices.  They use a computerized system for dispensing the ballast.  Herzog systems can be tracked and triggered by GPS so that metered amounts are dispensed along the track but not at switch points, trackside detectors, or other inappropriate locations like grade crossings.  They can also be controlled by one or two people on the ground who use a handheld radio system to trigger each ballast door individually.  You can even see the radio frequency ID numbers on the side of the car.  

There is usually a chase vehicle with someone to clean up any misplaced deposits, but considering you can now re-ballast a long stretch of track at nearly 20 MPH I wonder if the navvies of old would even recognize what's become of the railroads.  

Monday, October 04, 2021


Fokker Dreidecker.  
While not the best aircraft of the war, it was among the most maneuverable and remains, one of the most iconic aircraft of its time.   
See at the Air Force Museum in Dayton OH