Est 4003 to 4175

Chemins de fer de l'Est

Industry	Railway transport
Founded	1905
Headquarters	France
Area served	Eastern France

Est 4003 to 4175 comprised a series of 173 French compound 2-8-0 steam locomotives constructed between 1905 and 1914 for the Chemins de fer de l'Est. Engineered to accommodate the expanding steel production in Lorraine, these engines utilized a four-cylinder compound setup, incorporating two high-pressure cylinders placed internally and two low-pressure cylinders positioned externally. Manufactured by several firms such as Épernay Works, Henschel & Sohn, Sächsische Maschinenfabrik, Fives-Lille, and ANF Industrie, they operated at a boiler pressure of 16 kg/cm² and could attain speeds up to 75 km/h. The class featured Belpaire fireboxes and exhibited variations in tender capacity and cylinder measurements across different production runs. They served under both Est and later SNCF management before eventual retirement and scrapping.

Origins

These locomotives were developed as successors to the 4001 and 4002 prototypes produced by Société alsacienne de constructions mécaniques (SACM) in 1902. Manufactured in three distinct series, the initial two batches were assembled at the Est’s Épernay Works, while the final batch was completed by various external contractors:

• First series, numbers 4003–4017 (1905–1906), mirrored the prototype designs.
• Second series, numbers 4018–4070 (1907–1909), incorporated revised steam passageways.
• Third series, numbers 4071–4175 (1911–1914), featured a Schmidt superheater with 21 elements.

Production details

Manufacturer	Works No.	Year	Est No.	SNCF No.
Épernay Works	510–524	1905	4003–4017	1-140.A.3 – 17
Épernay Works	555–570	1907	4008–4033	1-140.A.18 – 33
Épernay Works	511–587	1908	4034–4050	1-140.A.34 – 50
Épernay Works	606–625	1909	4051–4070	1-140.A.51 – 70
Épernay Works	671–680	1911	4071–4080	1-140.A.71 – 80
Épernay Works	681–690	1912	4081–4089	1-140.A.81 – 90
Henschel & Sohn	10635–10654	1911	4091–4110	1-140.A.91 – 110
Sächsische Maschinenfabrik	3505–3524	1911	4111–4130	1-140.A.111 –130
Fives-Lille	3939–3968	1913	4131–4160	1-140.A.131 –160
ANF	106–120	1914	4161–4175	1-140.A.161 –175

Description

The Consolidation design employed four-cylinder compound mechanics with Walschaerts valve gear, incorporating a Belpaire firebox, Adams piston valves, and an Est-style horizontal regulator.

Tenders

Originally, these locomotives were paired with two-axle tenders carrying water and coal capacities of , weighing gross . Later units numbered from 4091 to 4175 received three-axle tenders that held greater volumes of water and coal , with a higher gross weight . Over time, these larger tenders were reassigned to earlier models.

Usage and services

As the primary heavy freight locomotive for the Est network, these engines were stationed throughout Eastern France in depots such as Nancy, Bar-le-Duc, Reims, Troyes, and Belfort. The superheated variants were capable of hauling trains at speeds of , reaching maximum velocities of on gentle gradients, and managing loads of on inclines up to a steepness of 2.25%.

All units continued operation following nationalisation and were renumbered by SNCF within the range of 1-140.A.3 to 1-140.A.175.

Between the years of 1932 and 1946, numerous locomotives underwent "Chapelonised" modifications featuring enlarged steam passages, six-jet exhaust systems, and smoke deflectors; these rebuilt units were reclassified from category A to C by SNCF.

They remained active until replaced by the SNCF 141R class between approximately 1948 and1951; none survived preservation after withdrawal by the year1954.

Specifications

• Total length (locomotive only):
• Theoretical peak tractive force: (4003 – 4070), (4071 – 4175)
• Practical maximum tractive force:

Tender

• Tender length: (4091 – 4175)
• Overall length including locomotive and tender: (4091 – 4175)