5AT Features

Special Features of the 5AT Locomotive

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This “Features” page covers features of particular interest relating to the 5AT that differentiate it from First Generation Steam.  These are covered under the following subheadings:

• Thermal Efficiency
• Power-to-Weight Ratio
• Adhesion
• Reliability
• Operating Costs
• Maintenance Costs
• Route Availability
• Fuels and Fuel Consumption
• Operating Range
• Emissions and Environmental Considerations
• Twin Valves and Steam Chest
• Long Stroke Pistons
• Steam-tight Valves, Pistons and Piston-rod Glands
• Long Travel Long Lap Valves with Large Port Openings
• Economiser and Feedwater Heaters
• Low Cylinder “Clearance Volume”
• Piston Tail Rods