Ok guys this one has been annoying me.. How do I put together a pattern for a Fowler compound cylinder?
I have found some pictures of one and there is clearly a join mark down the side of the cylinder but then there is that curved flange underneath that goes the other way and yes the valve chest has been cut off the top and rejoined but it looks like it was part of the same casting originally.. and that adds another flange at the top to prevent the pattern coming out of the sand

I have seen pictures of patterns for full sized Fowler cylinders but they don't give a clue as to the make up or splits for packing the sand for casting. Anyone any ideas?
Jo