That is a sweet looking engine Loring! You can go to the local sign shop that does sand blasted signs or 3d signs and get their scrap Z foam or high density foam board. I used that and extruded pvc sign board to make mine. It carves really easy and looks metalic when you brush epoxy over it. and it FLOATS! and its lite. Mine is less than 2 ounces.It's not that tough. 1/8 scale builders have been doing it for years. Since the gas scale boats are 120% bigger than 1/8 scale, you can have the Newton plans Merlin or Allison engine plan enlarged by any copy shop. That's where I started. All the detail was just for fun. If I was a real scale guy I would have added wiring and piping.
Lohring Miller
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