Made some progress on dismantling inspection of this engine. The nut came off the fan end ok. Looks promising so far. With a freed up crank 'n' piston, proceeded to carefully pull the cylinder.
Quite surprised to find the internal condition pretty good before cleaning.........thought you may like to see what the size of the Piston rings used to be 96 years ago-
To give you an idea, the bore diameter is 70mm. 2 of the 3 rings were stuck in their grooves initally, but just after I took this, they'd gently sprang out and all good so far.
Quick look at the uncleaned bore is also promising which is dead smooth as far as can see-