Twin Cylinder Steam Engine
This model is well illustrated in the 1935 F to L Sets manual as model F20. It uses a different electric motor to replace the E6R motor that the constructor did not have.
It is broadly built as per the outfit model, except for the motor reduction gearing and the motor, which is an E15R which replaces the E6R.
It is not a difficult model to build, but the quartering of the cranks needs care for the model to work correctly. A small governor has been added as well.
In all this is a simple representation of this type of engine and it works well.