To build the farm boy hit-&-miss 4-cycle engine. Farm boy is a bar stock engine requiring no expensive castings but is designed to look as though it was made from castings. As seen above, it is not possible to know it was made from bar stock. It is mostly aluminum alloy which is much stronger than castings and machines better as well. As a hit-&-miss type engine it needs no cooling system and will operate for long periods on a small amount of fuel. Running time is 12 hours on 2 ounces (59cc) of fuel. Even after all day runs the engine only gets slightly warm. The engine is not difficult to build, yet offers some interesting challenges to keep an experienced builder interested. Farm boy is designed to use an “o” ring on the piston instead of normal cast iron piston rings (the builder can use cast iron rings if desired). This results in near perfect compression from the first run and because there is very little cylinder friction, farm boy will coast from 20 to as many as 30 revolutions between firing. The plans set consists of 19 sheets of quality laser printed cad drawings and 2 sheets of construction notes. Cylinder bore: 1″ (25.4mm), piston stroke: 1-3/8″ (34.9mm), flywheel diameter: 6″ (152.4mm), engine length: 10.75″ (273mm), engine height: 6″ (152.4mm), engine width: 6.9″ (175mm). All of our plans projects are machined from metal bar stock (supplied by you, the builder) and no castings are required. But as can be seen, most of the model engines are designed to look like they were in fact made from castings instead of rectangular blocks and round bars of metal. We do not have any ready to run engines or bolt together engine kits for sale. The plans are for model engines – the engines can be scaled to any size, but no claims of suitability for practical power generation are made. The plans set drawings are high quality computer generated drawings using a professional cad (computer aided design) program and printed on 8-1/2″ x 11″ sheets with a laser printer. This permits you to insert them in plastic sheet protectors so they won’t get soiled as you use them in the shop. Dimensions are in u. Inch decimals – no fractions – which makes it easy for you to change the scale of your model to suit your machine tool capacity or the materials you have on hand or have access to. Multiply dimensions by 25.4 to obtain millimeter dimensions.The item “Farm Boy Hit-&-Miss 4-Cycle Engine Plans” is in sale since Tuesday, September 16, 2014. This item is in the category “Business & Industrial\Manufacturing & Metalworking\Metalworking Tooling\Manuals, Books & Plans\Plans”. The seller is “outpostenterprises” and is located in Hollansburg, Ohio. This item can be shipped worldwide.
- Country of Manufacture: United States