Another Lauson I built after the RSC Model. This is the slightly larger Lauson TLC349. This model is built in ½ size so it has a bore and stroke of 1 1/8th x 1 1/8th inches.
The Lauson TLC, is another popular engine built by Lauson. It also was built from 1939 through till after WWII. I purchased a full size TLC349 shortly before building this model; therefore, during its renovation I had ample opportunity to make careful measurements of the full size. That allowed me to build this model as a very accurate representation of the full size.
The model is built from aluminum bar stock, there were no castings used in the creation of this model. I have around 700 hours invested in this model.
The model uses ball bearing main bearings (because the full size uses ball bearings and I was trying to closely reproduce the full size). The model incorporates a one piece crankshaft, a cast iron cylinder liner and cast iron valve seats and guides, a functioning flyweight governor on the crankshaft (as the original), and a functioning float carburetor. The ignition is battery-coil, though the points are under the flywheel as the original.
This engine, being built after the RSC model allowed me to avoid some of the pitfalls I encountered in the construction of this earlier RSC. Its construction duplicates the construction of the RSC in many aspects.
I’ve included a few of the more interesting pictures I took during the build process.
1- fabricating the block
2- fabricating the block
3- completed block
4- completed rings
5- valve components
6- crankshaft with flyweight governor
7- float carburetor and components
8- blower housing fabrication
