Office of Steam Forum for Model & Toy Steam Gas & Hot Air Engines

I was running the #10 this morning on a really good flame, I had extended all three and flared it out.  This thing will fly and nearly move itself.  Then I started running it as slow as I could, letting it stop and starting it back up at slow speed again.  After about 3 of these cycles I got a real good "scare jump", the #10's pressure valve popped.  Well, I don't think it popped but my o-ring did.  The 670's didn't seem to care about the pressure.

So, it works - kind of, since it was the o-ring.  It doesn't actually fit well, its scrunched in.  I had to stuff it back down with my little jeweler's screw driver.

Edit:
I had a bright idea, that seems to be working pretty good.  I am using some of my 3mm ID x 5mm OD Flexible Silicone tubing. See last two attached images.  I fiddle with the pressure valve steam whilst it was full on steam and it blew steam, though it took a bit to get it reset & sealed.  I think perhaps 4mm ID x 6mm OD might work better.

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