Bone-Guelma Articulated Locomotives in Tunisia

Class 602 (Locobase 21031)

Data from online Flicker Historical Railway Images album at [], laat accessed 5 July 2022. Works numbers were 4135-4148 in 1908.

Locobase hasn't found much information on this clutch of metre-gauge Mallets. It's likely that these engines served the Tunisian railway system for decades.

Class 681 (Locobase 14725)

Data from Baldwin Locomotive Works Specification for Engines as digitized by the DeGolyer Library of Southern Methodist University Volume 63, p. 84+ . (Thanks to Alexander Blessing for his 16 June 2024 email supplying Baldwin's post-delivery data card that showed an increase in weight.) Works numbers were 53322-53323, 53334, 53352-53353,53365-53366 in June 1920; 53389, 53419-53420 in July.

Locobase 12378 describes the B-G briefly. This Baldwin order for ten Mallet tanks added to an already impressive stud of such twelve-axle haulers. The specs rated the line as having maximum 2% grades and minimum curve radii of 492 feet (150 metres) or 11 2/3 degrees.

Fuel was, unusually, soft coal and oil, the oil to be used as an auxiliary fuel "when the locomotive is working on grades." The oil burner was fitted to the back head under the fire door.

Baldwin's spec sheet estimated the loaded weight at 132,500 lb (60,101 kg), but the post-delivery figure shown in Locobase's data shows an 8,700 lb (about 4 metric ton) increase.