The Home Machinist!

If you can submurse the tanks in a water bath it will help to keep them from freezing up. If the tender is large enough that would be ideal since it keeps getting refilled with warmer water. Or a tank around the bottles could be drained and refilled when refilling the tender if the water is getting ...

The hand pump has no o ring because it should have packing material in the nut on the pump that the ram slids into. Either graphite or expanded Teflon will work.

As for the axle pump. It takes a standard o ring. I use Viton as others have noted.

Rob

Jack,

Just outstanding model work. I love your attention to detail. I wish your new railroad was a little closer to the east coast so I could visit.

Rob

I cut two plywood sheets, one the size of each end of the cone. Spaced them apart with some wood blocks. Then cut thin cardboard to fit the the plywood jig. Made a left and right side patterns. The I added 1/2 inch to the pattern beyond the cone. Notched around the cone area where the cone conformed...

Keep up the good looking work.

Rob

When wiring a sub panel the ground wires and the common must be kept sepperate. And sepperate common and ground run back to the main panel where the common and ground are both connected to the same terminal block. I have seen this not done correctly and results in the ground conducting current back ...

You can set the mill at an angle to the wall. That allows for long items hanging off the table to clear a machine next to it.

I suspect the horizontal crown sheet corroded quicker than the vertical side walls because the of 3 factors. First the crown sheet is more prone to scale build up staying in place, second the fire is directed towards it, and third the side walls have better heat removal buy the convection of the boi...

Is this O ring designed to have radial compression between the valve steem and housing with adequate axiel clearance to allow for expansion? Or is being squeezed axiel like a graphite packing? If its being squeezed then its going to expand in the trapped volume and tend to do what's happening.

Rob

It s
Appears to me from the photos the bulk of the crown sheet corrosion occurred on the fire box side, not the water side. I know condensed gas burnner combustion gasses are corrosive. So is that what primary cause of the crown sheet thinning?

Rob

A question on the test setup, did you set air the flow rate to be equal durring each test, or was the the flow controlled by pressure drop through the tubing? If both test were run at a set inlet pressure then the higher temp might be a result of a lower flow rate caused by the added pressure drop o...

Hope your still on the mend Kieth, and can make the trip.