Propulsion
Apollo had 2-shaft steam reciprocating engines and five boilers that gave 7000 indicated horsepower (ihp) using natural draught and 9,000 ihp (6,700 kW) using forced draught. She could make 18.5 knots (21.3 mph; 34.3 km/h) using natural draught and20 knots (23 mph; 37 km/h) at forced draught. She carried 535 long tons (544 t) of coal.
Read more about this topic: HMS Apollo (1891)