Steam Railway (UK) - - ‘GREAT WAR’ MALLETS -

Whereas the orig­i­nal NWE Mal­lets have their rear wheels partly con­cealed, the high-pres­sure en­gine at the back of

No. 99.5906 has in­side frames. That is just one of the vis­ual dif­fer­ences be­tween the de­signs, an­other be­ing the larger cab.

The en­gine also has a boiler pres­sure of 12 bar (174lb/sq in) rather than 14 bar (203lb/sq in). How­ever, both de­signs have a driv­ing wheel di­am­e­ter of 1m (3ft 3in).

The con­di­tion of No. 99.5906 has evolved over time, but although it looks dif­fer­ent the Harz en­gine is class­mate to an­other sur­vivor, No. 105, at Switzer­land’s Blonay-Chamby mu­seum line.

In con­trast to No. 99.5906, the other sur­viv­ing Harz Mal­lets were built by Jung. They are Nos. 99.5901 (1897), 99.5902 (1898) and 99.5903 (1901). Of those, No. 99.5903 is in long-term store.

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