Boiler
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No 1 Boiler

Prototype Dimensions

The following table shows takeoff dimensions for major boiler components including the stack, tank, and steam dome.  The fire box in this unusual locomotive extended down only to the base of the boiler in order to provide clearance for the rear drivers.

Dimension

  Inches 1:20.3
Boiler Diameter        28.0        1.38
Tank Length        48.0        2.36
Tank Height          7.0        0.34
Boiler Length      110.0        5.42
Smokestack Height          7.0        0.34
Smokestack Diameter          7.0        0.34
Steam Dome Height          6.5        0.32
Steam Dome Diameter        13.5        0.67
Smoke Box Length

30.0

1.47

The Boiler

The boiler length given in the table is from the front of the smoke box to the cab.  I added 0.58 inches to the converted length (5.42") to deal with the fact the wheelbase of the Lehmann Porter is 0.29 inches longer than the prototype and to allow the firebox to protrude slightly into the cab.  Converted Diameter is 1.38".  I found a pipe normally used for drain traps with a diameter of 1.48".  I cut it to 6" length.

This is the boiler after lagging has been applied.

Click photo for a larger image.

The Tank

I decided to build the saddle tank with a styrene frame and a sheet brass exterior.

The frame and outside sheet.  I used my drill press with a dull finish nail to emboss the rivits.

Click photo for a larger image.
This is a nearly complete saddle tank.  There's a little gap filling to do.  After I glued on the bottom brass sheet, i realized i should probably fill her with lead.  So I'll poke a few holes in the bottom side.

Then off to the paint shop. 

 

(c) 2007 Iron Horse 1:29