Shuffling around the internet produced no technical details of note regarding the machinery of the C.S.S. Arkansas. I do know that I.N. Brown did have a steam hammer constructed in order to beat Shipley's design into shape. How much of the machinery was built on site is a matter of conjecture I'd like to resolve. Both the mention of the ship having to stop to adjust her engine mounts and the ultimate cause of failure, a broken connecting rod, suggest a high pressure system. Detailed knowledge and sources, anyone?