The Steelman is a six-wheel shaft drive loco of 450 to 750 bhp. The first Steelman utilised the Rolls-Royce DV8TCA rated at 608 bhp at 1800 rpm and utilised a 2-speed "warm change" Wiseman transfer gearbox, giving the loco a top speed of 40 mph. The follow-on 4 locos – 3 with the Rolls-Royce DV8N (445 bhp) at 52tons and one with the DV8TCE (650 bhp) at 60tons – had re-designed bodywork and single speed transfer gearboxes. All five went to the British Steel Corporation. Rolls expected to develop 2-axle versions to replace the Sentinel models but the sale of Class 14 locos from BR adversely affected the market and without the volume of sales, higher unit costs precluded further development. Following Rolls-Royce's exit from loco building Thomas Hill took over the design, though resistance to it from Thomas Hill (senior) prevented it being offered until long after he'd retired, hence the regressive "Titan" design. The first two TH Steelman locos were built for ICI in 1984, and a sales drive within British Steel Ravenscraig resulted in their taking both the original 60Ton Steelman and the last of the production batch, which had meantime been the Varlen USA demonstrator and returned. Subsequently, Ravenscraig bought 2 new Steelman 60T 6w's using the Cat 3412, which power unit was also installed into a 75ton version for ARC Whatley Quarry.