GNRI Class PG

Great Northern Railway Classes PG, QG, QLG and QNG were a series of 0-6-0 freight locomotives introduced from 1899 by Charles Clifford.

History
The PG class was introduced in December 1899 by Charles Clifford with 4 ft driving wheels and 18+1/2 x cylinders. The QG's introduced in 1904 were 1 ft longer than the PG with 18+1/2 x cylinders weighed in 2 tons heavier. The key changed with the QLG class introduced in 1906 was a 4 ft wide boiler.