The ship had an overall length of 240 feet (73.2 m), a beam of 23.5 feet (7.2 m) and a draught of 7+5⁄6 feet (2.4 m). She was powered by 2 triple expansion reciprocating steam engines, driving two shafts, which developed a total of 7,778 indicated horsepower (5,800 kW) and gave a maximum design speed of 27 knots (50 km/h; 31 mph). During the trials the contract speed was exceeded, and the vessel was clocked at 27.27 knots (50.50 km/h; 31.38 mph).[3] Steam for the turbines was provided by two double-ended Yarrow boilers. Rio Grande do Norte carried a maximum of 140 long tons (140 t) of coal that gave her a range of approximately 3,700 nautical miles (6,900 km; 4,300 mi) at 14 knots (26 km/h; 16 mph).
The ship mounted two 4 in (102 mm) guns in single mounts. In addition, four 47 mm (3pdr) cannons in single mounts were deployed at the time of launching.
Gardiner, Robert and Randal Gray, eds. Conway's All the World's Fighting Ships 1906–1921. Annapolis: Naval Institute Press, 1985. ISBN0-87021-907-3. OCLC12119866.