Originally Posted by
fiery
Thread resurrection can be fun. Love your descriptor.
This is an interesting thread.
The disassembled example is mine. Sophisticated and rare. It will be renovated.
Note damage on the tip of the crescent baffle. You can just see where it has hit the recess in the contra piston.
So much intellectual effort expended in this thread!
Yes I noticed that. You could just clean it up and reassemble. Suouldn't make that much difference. I'm wondering why they went to so much effort to add that feature in the late 1960's. It doesn't look like a high performance engine, and there weren't any secrets in running a crossflow, flat topped piston diesel by then. What stops the contra from turning?
The baffle and head fit reminds me of the deep piston skirt groves in backplates like in say Rossi engines.
I love those hex headed head bolts. You can still get those in BA sizes at local "Live Steam" Model Engineering suppliers like Earnie Winter at Bathurst.