Here is a steam launch I am working on. Been a few years in the making, working on it when I have time.
Hull is a Diana 50" by Hartman fiberglass. Engine is a Krick/Wilesco Model II. I had initially planned to use the Krick/Wilesco boiler but it does not produce enough steam volume. So I am now using a Cheddar Puffin 9 flue vertical boiler. 15lbs of lead roofing sheet required for ballast.