Wikipedia:WikiProject Military history/Assessment/A-Class review
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The 250t-class F-group boats had short raised forecastles and an open bridge and were fast and agile, well designed for service in the Adriatic.[5]
They had a waterline length of 58.76 metres (192 ft 9 in), a beam of 5.84 m (19 ft 2 in), and a normal draught of 1.5 m (4 ft 11 in). While their designed displacement was 243.9 t (240 long tons), they displaced 267 tonnes (263 long tons) fully loaded.[6]
The boats were powered by two AEG-Curtis steam turbines driving two propellers, using steam generated by two Yarrow water-tube boilers,[2] one of which burned fuel oil and the other coal.[4]
There were two boiler rooms, one behind the other.[7] The turbines were rated at 5,000 shaft horsepower (3,700 kW) with a maximum output of 6,000 shp (4,500 kW) and were designed to propel the boats to a top speed of 28–29 kn (52–54 km/h; 32–33 mph).[6] They carried 20.2 tonnes (19.9 long tons) of coal and 31 tonnes (30.5 long tons) of fuel oil, which gave them a range of 1,200 nautical miles (2,200 km; 1,400 mi) at 16 kn (30 km/h; 18 mph).[7] The F-group had two funnels rather than the single funnel of the T-group.[2] The crew consisted of three officers and thirty-eight enlisted men.[8] The vessel carried one 4 m (13 ft) yawl as a ship's boat.[9]
93 T and the rest of the 250t class were classified as high seas torpedo boats by the Austro-Hungarian Navy, despite being smaller than the original concept for a coastal torpedo boat.[1][10] The naval historian Zvonimir Freivogel states that this type of situation was common due to the parsimony of the Austro-Hungarian Navy.[1] They were the first small Austro-Hungarian Navy boats to use turbines, and this contributed to ongoing problems with them,[2] which had to be progressively solved once they were in service.[5]