South African Railways Class NGG13 2-6-2+2-6-2

The South African Railways Class NGG13 is a 2 ft gauge 2-6-2+2-6-2 Beyer-Garratt design built by Hanomag of Hannover, Germany, in 1927 to 1929. Twelve engines were built, all by Hanomag; SAR did not order any further NGG13s after the initial batch.

The decision to place the contract with a German builder rather than with Beyer Peacock of Manchester (who held the Garratt patent) is a quietly notable point of railway history: South Africa's 1924 Pact government, which combined the Afrikaner National Party with the Labour Party, was hostile to British industrial interests, and the NGG13 order was placed with Hanomag in that political climate. Beyer Peacock continued to be paid royalties as patent-holder, but the engines themselves came from Hannover.

The NGG13 worked the SAR's 2 ft gauge Natal narrow-gauge branches alongside earlier and later Garratts, and provided the design template for the much larger later NG/G16 class that followed from 1937. Two NGG13s are preserved in Britain: 77 (Hanomag works no. 10629, 1928) at the Exmoor Steam Railway, and 60 "Drakensberg" at the Vale of Rheidol Railway, returned to steam in 2025.