How much design commonality existed between Royal Navy and U.S. Navy steam catapults?
Short answerMore than their separate origins suggest, but too little for convenient spare-parts compatibility.
NotesThe two navies' steam catapult systems shared more than their different development paths might suggest. That conceptual overlap did not produce the logistical commonality maintainers would have wanted. British and American imperial measurements further complicated the practical exchange of components. Shared engineering principles did not automatically create a common supply chain.