|7109's four 'pips'|
Beneath each of the two covers is a pair of engine cylinders.
|Rear engine's cylinders showing auto-drain cocks|
|Front engine RHS cylinder lid|
|Front engine RHS cylinder|
The cylinder wall looks like this (the others are similar):
|Front engine RHS cylinder wall|
On this occasion, however, I drenched the cylinder in new cylinder oil in preparation for running.
|Guess who took the photo!|
|Rear engine LHS cylinder|
|It was a fine day!|
The rectangular holes in the cylinder walls are the steam inlet and outlet ports.