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[xrad]

Two engine boiler combinations.  The horizontal boiler and Mildura are for the trawler hull. The coal fired vertical boiler and Stuart marine twin are for another all wood launch design loosely based on the 'African Queen' style.

[xrad]

had to repair one stripped bung on the top of the boiler. And the bung was damaged as well and I did not feel comfortable threading up a size. This required the big propane torch to keep the boiler body hot and the little oxy-map torch to do the fine work.   New sight glass and a few fittings. Came out well and holds 190 psi with no leaks that I could detect. 200 psi gauge, hard to see in the flash. No rupture either!  When you buy stuff off ebay, there is always the chance that it is a not a good unit, but this one worked out well. The original work was done very nicely. Two internal water tubes and water jacket down to the bottom mud ring.  Just have to lag it and build a base. Holds about 850 ml.

[kiwimodeller]

Hi Xrad, when you have a moment could you please post a photo of the hull and contact details for Microglass. It is not often you come across a decent size hull for a steam plant. Thanks, Ian.l

[xrad]

Orion Mouldings (Fifie hull and Pilot schooner hull) :

http://www.orionmouldings.com/modelboats.htm

Microglass:

http://www.microglass.net/index2.html


60in Royal Navy steam tug hull from microglass shown on page 2 of this thread

[xrad]

fire door done.  brass and steel, wood handle. I was going to acid wash the patina, but then this is going to be a work boat..maybe I will leave alone.

[xrad]

coal and wood.  too much heat loss, cold outside...blow off at 50 psi. Coal firing is an art form I don't yet possess.

[xrad]

messing around with the vertical boiler.  Using a Chinese camping burner . 15$ ebay. bought 2 and came in about 1 week. removed the legs and sparker and trimmed to fit the inner tube of boiler, took 5 min to get to fit perfectly.  Tried it like it was and slow to boil due to the burner flame mostly going right up the chimney. so....mad a copper inverted cone to disperse flame against the boiler walls (glowing red thing in video..attached to burner top with the center screw in pic)and lowered the burner to where the coal would be (raised the boiler). wow..runs great and does not use much gas. Raised the blow off a bit. Now keeps pressure at about 70psi with the safety valve open full time when all other valves closed.  This will make a great boiler for the stuart marine twin.


https://www.youtube.com/watch?v=TF1MzWBAODI&feature=youtu.be