Spark arrestors were fitted at a later stage, along with a system for passing captured sparks back to the firebox.
Spark | Muriel Spark | Nick T. Spark | Spark (TV program) | Spark (radio show) | spark plug | Spark-gap transmitter | Court and Spark | Vital Spark | The Low Spark of High Heeled Boys | Spark (Tori Amos song) | Spark Records | Spark plug | Spark Large | Spark arrestor |
The engineers incorporated developments proposed by L.D. Porta, including GPCS, Lempor exhaust, an improved spark arrestor, lightweight multi-ring articulated piston valves, improved valve events and improved mechanical lubrication.