Stuart Score - third run

With the burner jet re-sealed, I had hoped for a much better run, but unforeseen problems were lurking in store...

Category:

Science & Technology

Tags:

• Stuart
• Score
• steam
• engine
• model
• 504
• boiler
• Babcock
• ceramic
• gas
• burner
• Bix

[FireDropTechnologies]

Nothing a bit of 1/8th inch plate steel box welded won't fix. Burner wise,

But rather than a Standing water, or tea pot type boiler? Why not stop in and give me an email. In A PRIVATE message, I'll send you some flash boiler patterns. They heat much quicker,and make better preshure.

[jamespetts2]

Bought a new burner in the end, which fared rather better. Ended up realising that the engine was quite inefficient, in that the pistons were too small for the cylinders, so made new pistons (with graphite yarn packing) that were more precisely machined. Before I had time to put it back together and test it, though, I ended up moving out of my parents' house and into my own flat, where I don't really have space for this, so this is all in storage currently.

Thank you for the suggestion, though

[hotsteam37]

Hi James , Nice engine and video .Have you resolved your boiler problems ? Couldn't see any air admission holes in the casing . Let me know i would be interested in the solution .Regards Dave

[jamespetts2]

I have resolved the burner problems; I have a new Maccsteam burner, which goes in at the other end of the boiler: I have made a door to go at the chimney end which I open to light the burner, but is otherwise kept closed. I no longer light the burner through the air holes. Have a look at subsequent videos to see the improvements :-)

The boiler still does not provide enough steam, though: I shall need a new boiler in the end, but this one may be useful for a smaller engine that I am building.

[jamespetts2]

I think that I have worked out (with some help from people on various forums) what might have caused the burner to destroy itself: I lit the burner, as can be seen at about 01:40, from the jet, not from the top of the ceramic.

This seems to have caused a flame to burn *inside* the burner, destroying it from within, creating so much heat as not only did the brazed joints unbraze, but the ceramic itself melted slightly underneath.

[caserules1]

It is best to have high pressure in the boiler than to have low, high pressure steam is much dryer and wont have as much condensate in exhaust or in the whistle. Hope you use cylinder oil

[97trainman]

you have to much insulation, the burner needs to have some ventalation

[Axbent]

oh noes!!!! Burner iz melted!