Building an engine from plans?
Has anyone built either of these steam engines? Whats your opinion, do you think either would make a good marine engine for RC boat use? The first one looks rather simple, but could be made into a twin for more power. There is a raw materials kit available. The second is a twin that doesn't require castings to build. But neither has reverse gear? Not sure how you would gedt reverse without some sort of transmission.
Little Machine Shop oscillating engine:
Or this more complex "no castings" twin cylinder: