Why was the water glass considered the most important safety device
Chapter 1

The fireman's rolling furnace

Chapter 2

The engineer's command center

Chapter 3

The mind-bending physics of water and draft

Chapter 4

Life on the footplate

Ch 2 · The engineer's command center
C
chrisd

chrisd Steam locomotive crews trusted the water glass gauge to prevent explosions.

1h ago

C
chrisd

chrisd Water Glass Gauge

Trust the glass, trust the glass / Water shows up black, trust the glass

1h ago

C
chrisd
To sustain momentum, we must ease off the force that got us moving.

1h ago

C
chrisd

chrisd Locomotive engineers operate the high-pressure steam throttle.

1h ago

C
chrisd
Facing the hot backhead control wall

chrisd Containing boiling water and pressurized steam, this exposed boiler end radiated intense heat that warmed the cab even during winter

1h ago

C
chrisd
Hooking up the heavy Johnson bar

chrisd Steam locomotive engineers use the Johnson bar to regulate steam entering the pistons

1h ago

C
chrisd
Operating the high pressure steam throttle
BETA

chrisd Slide the steam throttle to learn how pressure drives a massive locomotive.

1h ago

C
chrisd
Fun Fact

The company notch: Railroads had a specific notch on the Johnson bar rack called the 'Company Notch' because it was the most fuel-efficient setting for saving money!

1h ago

C
chrisd
Glossary
cab (noun)
The enclosed compartment of a locomotive, truck, or other vehicle in which the operator sits. The Flying Scotsman utilized a specialized corridor tender to allow crew changes through the cab while moving.

1h ago

C
chrisd
Gossip

Would you trust yourself to drive a steam locomotive?

1h ago

C
chrisd
Quiz

What made the cab of a steam locomotive incredibly hot even in freezing winter weather?

1h ago

C
chrisd

chrisd Locomotive engineers operate the heavy Johnson bar to control steam.

1h ago

C
chrisd
Quiz

What is the exposed rear wall of the locomotive boiler inside the cab called?

1h ago

C
chrisd

chrisd The exposed backhead control wall inside a steam locomotive cab

1h ago

C
chrisd
Quiz

What is the primary function of the large lever known as the Johnson bar?

1h ago

C
chrisd
Quiz

Why did engineers pull the Johnson bar closer to the center once the train was moving at speed?

1h ago

C
chrisd
Quiz

Where does the steam go immediately after passing through the throttle valve?

1h ago

C
chrisd
Quiz

What happens if a steam locomotive engineer opens the throttle too quickly from a complete stop?

1h ago

C
chrisd
Quiz

Why was the water glass considered the most important safety device in the cab?

1h ago

C
chrisd
Quiz

What catastrophic event could occur if the crown sheet of the firebox was left uncovered by water?

1h ago