Toymaker's latest activity

A closer exam of the impact of blue-flames on metal. I wanted to touch on this subject again because I find it very interesting and...

I should have taken your aluminum casting classes 30 years ago,... I was not aware of nitrogen degassing pellets or using aluminum flux. :)

I taught high school metals shop for 40 years and we cast with mixed aluminum scrap using a aluminum flux and nitrogen degassing pellets...

About 30+ years ago, while living in humid Florida USA, I poured a few aluminum castings using the lost wax technique. I used...

You're not alone in not fully understanding the math needed to predict where a given working fluid will change state from liquid to...

There's a short expression used among steam automobile enthusiasts I rather like; "Keep the Fluid moving!!" It means that as long as...

Hopefully, and with lots of luck and helpful suggestions from forum members like yourselves, at some future date I will have a...

The entire hot section of the burner assembly is located inside the boiler's copper tube coils, (see diagram in post #437). Any heat...

These are design issues. Sometimes you can compensate via operational control changes, other times you just have to bite the bullet and...

Steamchick, Your suggestion of an O2 sensor in the boiler exhaust is a good one. It looks to me like Toymaker is setting up his...

Thanks for the assessment of my comments. I reckon you are better in control than we know, but for sake of trying to help, I just...

Troll, Hot spot tube failures in a water tube boiler are rarely caused by fire side issues - rather they are overwhelmingly the result...

A blue flame is a result of complete combustion and it yields the highest temperature. If you do not allow flame impingement on the...

If I understand most of your post correctly, your overarching theme is, "be cognizant of energy density"; which is good advice which I...

Recall that the burner assembly has a stainless steel round disc or plate (left photo below), which restricts the flow of exhaust flames...