Tom Phillips, Broken Arrow, OK 11/12/20057
I liked the Philip Duclos design of an upright engine but I wanted a larger more conventional engine.
The rails and box are my design. When finished there will be a top lid.
Inside the box is a second lid that has an LED lit off/on rocker switch and charging posts, the battery and coil are under this second lid.
The bore is 1.250” and the stroke is 2” and is fed fuel by a Lunkenheimer style mixer. The flywheels are 8.25” with a ½” keyed main bearing crankshaft. Compression ratio is 5.0 – 1.
I used a cast front ring and a double lip square cut Viton rubber second ring. The piston is cast and has a cast cylinder liner.
The cam, push rod and gears are my design and are conventional in operation. The governor is also my design although standard in operation.
I used two cast flywheels and a fuel system of my own design that uses a lunkenheimer casting for the mixer. It is a partial gravity flow fuel delivery using Ozark Trails lamp fuel with 10% WD-40. The fuel tank is made from brass bar stock and the cut off valve is my design also.
Copyright 2007, Florida Association of Model Engineers and engine builder as noted above, All rights reserved.
