Adriatico / Ferrovie dello Stato 4-4-0 Locomotives in Italy


Class Details by Steve Llanso of Sweat House Media

Class Gruppo 510 (Locobase 13538)

Data from Locomotiva FS 510 in Wikipedia at [link] (last accessed 12 December 2011) . Additional data from diagram published on DUEGI EDITRICE's TuttoTreno website [link], a modelling site with a great deal of data. (visited 11 July 2004).

This large class of Eight-wheelers was supplied by a variety of builders for a variety of lines. Ansaldo produced the greatest number of engines -- 34. The other manufacturers were:

Maffei 16, Henschel 13, Societa Sassone 9, Costruzioni Meccaniche di Saronno 9, SLM in Winterthur 8, Vulcan Foundry 3, Floridsdorf 2, and Officine ferroviarie di Torino 1. Saronno was the last to deliver engines, that event occurring in 1895.

Although relatively small, the design had passenger-sized drivers and was rated for a maximum speed of 85 km/h (52.8 mph). Some had a 15.7" (400-mm) shorter boiler and consequently larger grate, but all achieved the same power.


Class RA 180bis/Gruppo 552 (Locobase 3672)

Data from Ugo Poddine as contributor to Bryan Attewell ([link] Steam locomotive simulator (April 2000). [link] (visited 30 June 2005) describes the class as having had two simple-expansion cylinders, but the diagram does not give the cylinder diameter.

Fast express engines that pulled the Valigia delle Indie express from Bardonecchia to Brindisi in 16 hours. (Poddine notes that the boiler used Serve tubes; see entry 3051 on Nord's 1891 4-4-0s for further information..)

Principal Dimensions by Steve Llanso of Middle Run Media
ClassGruppo 510RA 180bis/Gruppo 552
Locobase ID13538 3672
RailroadFerrovie dello Stato (FS)Adriatico (FS)
CountryItalyItaly
Whyte4-4-04-4-0
Number in Class10512
Road Numbers5521-5532
GaugeStdStd
Number Built10512
Builderseveral
Year18781890
Valve GearGooch
Locomotive Length and Weight
Driver Wheelbase (ft / m) 7.55 / 2.30 7.97 / 2.43
Engine Wheelbase (ft / m)19.69 / 621.98 / 6.70
Ratio of driving wheelbase to overall engine wheelbase 0.38 0.36
Overall Wheelbase (engine & tender) (ft / m)39.04 / 11.9044.59 / 13.59
Axle Loading (Maximum Weight per Axle) (lbs / kg)35,274 / 16,00032,628 / 14,800
Weight on Drivers (lbs / kg)62,611 / 28,40065,036 / 29,500
Engine Weight (lbs / kg)95,681 / 43,400106,483 / 48,300
Tender Loaded Weight (lbs / kg)54,675 / 24,80065,918 / 29,900
Total Engine and Tender Weight (lbs / kg)150,356 / 68,200172,401 / 78,200
Tender Water Capacity (gals / ML)2165 / 8.202640 / 10
Tender Fuel Capacity (oil/coal) (gals/tons / Liters/MT) 3.30 / 3 4.40 / 4
Minimum weight of rail (calculated) (lb/yd / kg/m)52 / 2654 / 27
Geometry Relating to Tractive Effort
Driver Diameter (in / mm)72 / 183075.60 / 1920
Boiler Pressure (psi / kPa)159.50 / 1100174 / 1200
High Pressure Cylinders (dia x stroke) (in / mm)16.93" x 22.05" / 430x56018.9" x 23.6" / 480x599 (1)
Low Pressure Cylinders (dia x stroke) (in / mm)25.6" x 27.6" / 650x701 (1)
Tractive Effort (lbs / kg)11,901 / 5398.2111,249 / 5102.47
Factor of Adhesion (Weight on Drivers/Tractive Effort) 5.26 5.78
Heating Ability
Tubes (number - dia) (in / mm)
Flues (number - dia) (in / mm)
Flue/Tube length (ft / m)10.42 / 3.18
Firebox Area (sq ft / m2)
Grate Area (sq ft / m2)23.14 / 2.1524.80 / 2.30
Evaporative Heating Surface (sq ft / m2)1084 / 100.751764 / 163.94
Superheating Surface (sq ft / m2)
Combined Heating Surface (sq ft / m2)1084 / 100.751764 / 163.94
Evaporative Heating Surface/Cylinder Volume188.68460.38
Computations Relating to Power Output (More Information)
Robert LeMassena's Power Computation36914315
Same as above plus superheater percentage36914315
Same as above but substitute firebox area for grate area
Power L1
Power MT

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