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Discussion starter · #45 ·
Kno3 I like the tugboat you use as an avatar! Ive done live steam tugs since well before trains.


I didnt have any good photos of the burner so I removed it from the engine this morning and snapped a couple (poor ones)
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the sun is streaming in my office this morning...I am holding the wind screen which protects the burner. the burner is two very short sections of pipe...a 1 1/4" and a 1 " diameter. which leaves a gap between for the wick. the wick is a strip of stainless steel mesh. I snipped about 1/8" deep 1/8" apart along one edge to "tuft" it I bent some of the tufts out some in to spread the wick to make more flame surface. the tube running from the right feeds alcohol to the bottom of the wicks (i drilled a little hole in the top of the tube). the wicks sit in a little pool of alcohol. the depth of this pool is controlled in the sump to the right.
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this is the bottom of the fuel tank (under the deck of the loco). the tube sticking out of the hex fitting is where the alcohol drips into the sump. the other tube with the angled bottom is the vent or breather. when the fuel tank is filled and the cap secured, the vent controlls the amount of fuel which is in the sump. the alcohol drips from the tank ONLY when air can flow into the vent...that is when it is above the surface of the fuel in the sump. Thus the fuel can only fill in the sump up to the opening at the bottom of the breather vent. as fuel is used, the vent is exposed and more fuel flows. in theory, the fuel never over fills the sump or the burner but is always in sufficient supply to keep the burner going.

basically what controls the burn is how much air is drawn up past the fire... the stronger the draft the stronger the fire.
 
I guess I must have missed this thread last winter. That's a nice running engine there! I enjoyed the video that you made of it running in the snow. It gives me ideas for what to do with that boiler I built a couple of years ago.
 
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