Front Engine
Here you're looking at the front/leading engine under the 1309 locomotive frame. This front engine articulates so that the locomotive can go around tighter turns. The pistons on the low-pressure front engine are 35 inches in diameter where the pistons on the high-pressure rear engine are 22 inches in diameter. The engine uses high pressure steam first in the rear engine, and then "recycles" the steam into the low-pressure front engine. This makes the engine be known as a compound locomotive. It's really wild to see working in person. It sounds like two steam locomotives pulling the train, when it's just one giant behemoth.
Front Engine
Here you're looking at the front/leading engine under the 1309 locomotive frame. This front engine articulates so that the locomotive can go around tighter turns. The pistons on the low-pressure front engine are 35 inches in diameter where the pistons on the high-pressure rear engine are 22 inches in diameter. The engine uses high pressure steam first in the rear engine, and then "recycles" the steam into the low-pressure front engine. This makes the engine be known as a compound locomotive. It's really wild to see working in person. It sounds like two steam locomotives pulling the train, when it's just one giant behemoth.