4D10 – Ipswich Class

Total Number of Engines Built 3
First Engine Built 1884
Last Engine Built 1885
First Engine Written Off 1900
Last Engine Written Off 1902


Three A10 boilers had been completed at the old Government Workshops prior to the 1879 Select Committee recommending no further locomotives be built there. In 1883 there was a shortage of motive power for the then expanding suburban network. A decision was taken to construct three tank engines using the boilers on hand together with other available spare parts. The resulting engines were small and only rated to haul a load of 60 tons. They were the last engines built at the Government Workshop. The new Railway Workshops commenced constructing locomotives in 1903. All three were fitted with vacuum brakes in 1887.

Technical Details
Wheel Arrangement2-4-2T
Cylinders (diameter x stroke) ins.10 X 18
Coupled Wheels diameter ins.36
Boiler Pressure - psi.120
Heating Surface - tubes354
Heating Surface - Total sq. ft.385
Grate Area - sq. ft.7.1
Weight - Adhesive11.5
Weight - Engine24.1
Weight - Tender-
Coal Capacity - tons1.5
Water Capacity - gallons550
Tractive Effort - lbs. (85%)4800
Factor of Adhesion5.36
Valve GearStephenson's
Class Roster