Model Marine Boiler and another Koffiekop.
At the recent Geelong Society of Experimental and Model Engineers (GSMEE) meeting, several interesting models were presented, including my Koffiekop engine. And another Koffiekop, this one by Stuart T.
Another most interesting model is the marine boiler by Rudy pictured below. Rudy was a marine engineer, and some of his ships were steam powered. This model is made from his memory of one of those. The odd external shape is to conform with the ship’s hull, starboard (right hand) side.
Rudy has pressure tested the boiler to 100psi. He reckons that it would be good for 200psi. He tested it with compressed air, submerged in a barrel of water. That would show any leaks. And if it did happen to blow, the force would be diffused by the water.