Hi Jonesie, thank you for the compliment. I'm sorry but there are no dwgs for this engine. I built this a few years ago to see if I could do it and if I could, how well.
There was a lot of hand work as it is built from bar stock exept for the flywheels. I tried to make it look like castings and that is what took alot of work. The side shaft gears are from Paul Debolt's Vaughn engine and they are still available. The gears that drive the flyballs for the governor are from Boston gears and are 2:1 ratio.
I have tendency to take on projects like this to challenge myself and to have something a little different to show off at the shows I go to. I started building model engines in 2000 after going to the Names show for the first time, what an experience. After building a few casting kits of IC engines I started to get bored with building others designs and started to design and build my own creations. This is the first of my own designs and I didn't plan on any documentation at the time I built it. When I build I normally will draw basic sketches just to make sure I don't box myself in anywhere but I will fit each component as I go. I will spend much more time thinking about the design than it takes to build it. I worked on my Rattler design for 3 months before ever making a chip and built the entire engine in just 3 weeks. Consider trying your own design, its not that difficult and the rewards are beyond description. Once again thank you, Dave