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Richard Williams,                 Sweet Home, OR        rwill@centurytel.net    3/23/2003    

This is a Three Cylinder Fairbanks Morse
Castings by Pacific Model Design
1.375 " bore and 1.500" stroke.
Fuel; gas or propane, the carburetors have two needle valves, one for gas and one for propane. Ignition; Ignitor fired

 

This engine first ran in February 2003.  It is the first proto type with all aluminum castings.  with the exception of flywheels, cylinder liners and valve cages.  It is also 19 lbs lighter than the cast iron engine.  It is as close as we can get it to the full size engine.  It has air start with all the oilers.  All the oilers work except the ones on the side of the engine.  These were to lubricate all the internal and external bearings, because the big engine had a dry sump, the model has oil in the base with slingers on the rods to lubricate all the internal parts.  This is a exceptional good running engine, I have tached this engine at under 200 rpms.  But it will need to run faster so the slingers on the rods can lubricate the top end.  This engine is not that hard to build, it has a lot of castings and you need to make a lot of parts.  But it is all worth it in the end when you fire it up for the first time and you hear that wonderful sound.  This engine started and ran on the sixth flip of the flywheel.

 

 

 

These are some in progress pictures.        First posting 2/8/2003

The crank throws are 120 degrees  apart, which makes it well balanced. It is ignitor fired, fuel is propane or gas.  This engine is quite different from most engines, it has air start.  If some of you are not familiar with this there is a shifting mechanism when shifted that stops the intake valve from working, and shifts a cam that operates an air valve putting air in the rear cylinder only on the power stroke.  The compression is released on number two cylinder, and it starts on number one.  Once it is running close the compression release on number two, move the shifter on three and all three are firing, the firing order is 1 2 3.
For those of you that like drilling and tapping holes this is the engine for you. It has 172 holes just in the engine block, and 124 bolts.  This engine has 253 parts not counting bolts and nuts, and 54 castings.  Will send a picture later when it is all done.  I am also building a two cylinder at the same time, they share the same parts, other than the cam, crank, and block.
 

 

Copyright 2003,  Florida Association of Model Engineers and engine builder as noted above, All rights reserved.