The 13/5 is relatively conventional by Cyldon standards.
The overall layout is typical of many stationary steam toys.
It is unusual in the extensive use of aluminium alloys.
The base, engine frame, valve block, flywheel, firebox and chimney are all mazac or aluminium alloy; most of the rest of the engine is brass.
There is very little steel used, only the crank shaft, piston / valve rods and a few other minor items.

The burner is an unusual four wick design, fixed to the base with the cylindrical tank outside of the firebox, at right angles to the wick holders inside.
Lighting the wicks has to be done through a slot in the firebox.
Adjusting or replacing the wicks requires detaching the burner from the base.
The boiler is a pretty standard design, slightly larger than the other models.

Steam feed is taken from the bottom of the boiler, through the burner flame for superheating, and out to a compression fitting on the valve chest.
The slide valve is controlled by a fixed crank on the crankshaft.
The engine is not reversible.

The cylinder is a mazac casting with brass end caps, mounted on a substantial mazac frame.
It is double acting.
Exhaust is piped to the bottom of a chimney, which is mounted on the base.

The end of the piston rod is connected to a built-up crank at the centre of the crankshaft.
The crankshaft has the valve return crank at one end and a flywheel at the other.
Also at the flywheel end is a small pinion meshing with a larger gear wheel mounted on a bracket cast in with the engine frame, giving a slightly more than 2:1 speed reduction.
The second shaft has a small pulley attached.
The 13/5 is relatively conventional by Cyldon standards. The overall layout is typical of many stationary steam toys. It is unusual in the extensive use of aluminium alloys. The base, engine frame, valve block, flywheel, firebox and chimney are all mazac or aluminium alloy; most of the rest of the engine is brass. There is very little steel used, only the crank shaft, piston / valve rods and a few other minor items.
The burner is an unusual four wick design, fixed to the base with the cylindrical tank outside of the firebox, at right angles to the wick holders inside. Lighting the wicks has to be done through a slot in the firebox. Adjusting or replacing the wicks requires detaching the burner from the base. The boiler is a pretty standard design, slightly larger than the other models.
Steam feed is taken from the bottom of the boiler, through the burner flame for superheating, and out to a compression fitting on the valve chest. The slide valve is controlled by a fixed crank on the crankshaft. The engine is not reversible.
The cylinder is a mazac casting with brass end caps, mounted on a substantial mazac frame. It is double acting. Exhaust is piped to the bottom of a chimney, which is mounted on the base.
The end of the piston rod is connected to a built-up crank at the centre of the crankshaft. The crankshaft has the valve return crank at one end and a flywheel at the other. Also at the flywheel end is a small pinion meshing with a larger gear wheel mounted on a bracket cast in with the engine frame, giving a slightly more than 2:1 speed reduction. The second shaft has a small pulley attached.
Cyldon