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Research draft

steam locomotive

vr.tr.steam-locomotive · PHY.OBJ

Let an agent identify a steam locomotive by wheel arrangement, class and builder, explain how it works, relay heritage operation, boiler safety and preservation rules, and separate steam locomotives from other steam vehicles and from diesel and electric traction.

Thing Registry Physical world and living systems

Research draft, second pass

A second pass drafted this model: the structure a model of this thing needs, and what is known about it in the world. The line under this one says how the second half was obtained - researched against sources, or recalled without web access, in which case nothing here was read anywhere and every claim is a lead to verify. Unreviewed either way.

written by Claude from model knowledge without web access - no source was read, every claim is a lead to verify

Researched by: Claude

Purpose and description

Let an agent identify a steam locomotive by wheel arrangement, class and builder, explain how it works, relay heritage operation, boiler safety and preservation rules, and separate steam locomotives from other steam vehicles and from diesel and electric traction.

A railway locomotive powered by a steam engine, in which fuel such as coal, wood or oil heats water in a boiler to make steam that drives pistons connected to the wheels; the dominant form of rail traction from the 1820s to the mid twentieth century, now used mainly on heritage railways and in a few remaining commercial operations.

What it is for: Hauling trains; today mainly heritage and tourism.

It can be identify class, wheel arrangement and builder; explain how boiler, cylinders and valve gear work; relay heritage operation and boiler safety rules; relay preservation and museum information.

Distinguishing features

Steam engine with boiler and cylinders

Wheel arrangement classification

External fuel and water supply

Heritage status in most countries

What it looks like

A locomotive with a boiler barrel, chimney, cab at the rear, driving wheels connected by rods, and usually a tender for fuel and water.

Physical character

boiler pressure: 10-20 bar - typical for later designs

mass: 20-300 tonnes - with tender at the top end

maximum recorded speed: 203 km/h - Mallard, 1938

How it is recognised

Boiler, chimney and connecting rods

Tender or tank for water and fuel

Steam railcars and traction engines are other steam vehicles

Related models

is a kind of - the general class

locomotive

is powered by - the prime mover

steam engine

is preceded by - earlier traction

horse-drawn railway

is succeeded by - later traction

diesel locomotive

In practice

Families and kinds

tender locomotives

tank locomotives

articulated locomotives such as Garratt and Mallet

by wheel arrangement under Whyte or UIC notation

narrow gauge steam

preserved and replica locomotives

Identifiers

Whyte notation such as 4-6-2 wheel arrangement

works number builder specific identifies the individual locomotive

Standards and regulation

Boiler inspection and pressure vessel regulations

Heritage railway safety rules

Main line steam operation rules where permitted

Heritage protection of preserved locomotives

Failure modes and hazards

Boiler explosions from low water or corrosion

Fires from sparks

Crew injury and scalding

Deterioration of preserved locomotives

Where this came from

wikidata · CC0 1.0

Source repository Registry entry point

Drafted structure

Bundle to layer to finding to question, as the second pass will find it: 4 bundles · 8 layers · 8 findings · 16 questions.

Identify Which locomotive.

Identity.

Class

Class and arrangement.

Class

Class.

  1. Which class and wheel arrangement is this, who built it, and when? definition
  2. Is the vehicle a steam locomotive or another steam vehicle? boundary

Specification

Specifications.

Specification

Specification.

  1. What are the boiler pressure, tractive effort, mass and speed? measurement
  2. Which source gives them? provenance
Work How it works.

Engineering.

Principle

Boiler and cylinders.

Principle

Principle.

  1. How do the firebox, boiler, cylinders and valve gear produce motion? definition
  2. Which entry fits the steam engine? action

Operation

Crew and operation.

Operation

Operation.

  1. How is a steam locomotive prepared, fired and driven, in general terms? provenance
  2. Which entry fits footplate crew roles? action
Safety Boilers and rules.

Safety.

Boiler

Boiler safety.

Boiler

Boiler.

  1. What boiler inspection and safety rules apply, and what causes boiler failures? provenance
  2. Which entry fits pressure vessel regulation? action

Heritage operation

Heritage and main line rules.

Heritage

Heritage.

  1. What rules govern heritage and main line steam operation? provenance
  2. Which entry fits heritage railways? action
Context History and preservation.

Context.

History

History.

History

History.

  1. How did steam locomotives develop from Trevithick and Stephenson to the last designs? provenance
  2. Which references are standard? provenance

Preservation

Preservation.

Preservation

Preservation.

  1. Which locomotives are preserved, where, and how is preservation organised? provenance
  2. Which entry fits a specific locomotive? action

What the second pass must settle

  • Should wheel arrangements be separate entries?
  • How should preservation registers be linked?
  • How should individual famous locomotives be related?
Draft as JSON