Dragonfly-class river gunboat

HMS Locust, one of the class
Class overview
Name:	Dragonfly class
Builders:	Vosper Thornycroft, Yarrow Shipbuilders, J S White
Operators:	Royal Navy
Subclasses:	HMS Scorpion
Planned:	6
Completed:	5
Cancelled:	1
Lost:	4
General characteristics
Type:	River gunboat
Displacement:	585 long tons (594 t)
Length:	197 ft (60 m)
Beam:	33 ft (10 m)
Draught:	5 ft (1.5 m)
Installed power:	3,800 shp (2,800 kW)
Propulsion:	Geared steam turbines, 2 admiralty type boilers Two shafts
Speed:	17 knots (31 km/h; 20 mph)
Complement:	74
Armament:	2 × 4 inches (100 mm) guns on single mountings 1 × 3.7 inches (94 mm) howitzer 8 × machine guns

The Dragonfly class was a class of river gunboats. Six were planned and five were built: of those five, four were lost in the Second World War. One of the four was HMS Scorpion, a slightly upgunned and better powered version. The class consisted of: