I have looked for such a plan for about ten years, have never found the boat.
A few years ago I did come across the engine, seems the company still has the plans.
the boats plans were destroyed during the blitz, so I hear…
Now with retirement staring me in the eyes I should have time to build her if I can find the plan.
Failing that I could just build a working model of Graf Zepplin drew those plans back in 71 while working for a radio control model company. Think they are in the attic…If I drew it once guess I can do it again with cad this time.
I have seen the one out of Florida, it was on display localy twice once for a convention, once for tall stacks, paddle wheel steam boats ( local Event) boat builders heaven..