A steam engine is basically a method of turning pressurised steam created in the boiler into forwards and backwards motion via means of pistons and connecting rods to the wheels. However, a locomotive such as General Steam Navigation takes the basic principles to create a complex design to create power and efficiencies.
These pages aim to provide an overview of some of the design features incorporated within General Steam Navigation.
Click on the links below to find out more:
The Bulleid boiler design was a highly efficient steam raiser and “generally recognised as the best of all pacific boilers”. Read more about the design here.
The reciprocating motion from the piston must be transferred to rotary motion to drive the wheels. The motion from an inside cylinder is transferred via a crank axle. Read more about the crank axle and how we are going to achieve replacing the missing crank axle on 21c11/35011 General Steam Navigation here.
The purpose of the valve gear on a steam locomotive is to control the flow, direction and amount, of steam passing into and out of the cylinders, Bulleid's innovative chain drive valve gear is described here.
One of Bulleid’s most instantly recognisable features on his Southern Railway locomotives are his BFB wheels.
There were two designs of trailing trucks fitted to Bulleid Merchant Navy pacifics, our 21c11 / 35011 is unique amongst those preserved in being itted with one of the fabricated type of trailing truck.
One of GSNs unique features a Sand Gun fitted on the Firebox Back Plate
Another recognisable feature of Bulleid pacifics was the electric lamps fore and aft and also within the cab. Electricity was generated on board by a “Stones steam generator”.