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Building the Atkinson Cycle Engine by Vincent R.Gingery

Now here's an unusual engine you can build. Vince's description from the backcover tells the story:

"Build the rare and unusual Atkinson Engine from the 1880"s. It had to be an unusual engine. After all, Atkinson was competing in the expanding small engine market against Nicholaus Otto"s newly developed four-stroke engine. Otto held numerous patents that virtually eliminated all competition. To avoid infringement, Atkinson was forced to create a completely new approach to internal combustion. When you build his engine, you"ll quickly appreciate how creative Atkinson was.

We have found that wherever we show this engine, people are amazed and fascinated by it. They ask... Where are the timing gears? What about a separate cam shaft? How does it run? How can it complete four cycles in a single revolution of the crankshaft? Are you sure it's not a two cycle engine?

We smile and explain that the secret lies in the unusual design of the crank linkage which, believe it or not, allows the exhaust, intake, compression and power strokes to be completed in one revolution of the crankshaft. The cams are located on the crankshaft eliminating the need for timing gears and cam shaft. Simplicity adds elegance to innovation.

Inside this book you get step-by-step instructions showing how to build an Atkinson "Cycle" engine designed and perfected by Jim Lewis. Castings are suggested for the base, flywheel, cylinder head and crank linkage, but none of these parts are so complex that they could not be made from stock material. Other parts are readily available, and suppliers names and addresses are provided to make it even easier. A lathe, milling machine or milling attachment and other tools one would expect to need in a project of this type are required.

Building the Atkinson "Cycle" engine is well worth the time and trouble. You will discover that nothing quite compares with the satisfaction of machining inert pieces of metal into engine parts, assembling them, and then watching a living, fire-breathing internal combustion engine come to life.

You can be sure that very few people have a running version of an Atkinson engine, let alone one they can claim they built themselves. This engine will be something you can be proud of. You"ll really enjoy showing it off to your friends."

You get the typical Gingery detailed drawings and text for making the patterns, machining the castings, and assembling the engine. I saw the prototype run. Interesting engine, to say the least. And one you can build. This is the first of a number of Gingery engine books, so get a copy and build this while the others are being written.

Specifications.....

The flywheel is an aluminum casting and weighs about 3 pounds. Its finished diameter is 8-3/4". The 7/16" crankshaft is held in place by two aluminum cast support pillars. The ignition points and condenser are from a late 1970's Ford V-8 engine.... An ignition cam mounted on the crankshaft opens and closes the points.The intake and exhaust cams are also mounted on the crankshaft.... The crankshaft bushings are lubricated by grease cups.

The drive linkage consists of the crank throw, the connecting rod, the piston rod, the pivot post and the pivot arms. The crank throw is made from 3/8" H.R.S. and is brazed to the end of the crankshaft.... The connecting rod is an aluminum casting and it pivots from the end of the crank... The pivot arms are made from aluminum bar stock. The pivot bushing is lubricated with a grease cup and the piston rod is lubricated with oil by means of oil holes at the piston connection and the crank connection. The piston measures 1-1/4" in diameter and is made from 1-3/8" aluminum round stock. The piston rings used are 1-1/4" and are made from cast iron. The cylinder is made from 1-1/2" cast iron round stock.

A water jacket is built around the cylinder and is constructed of 1/8" sheet steel. The water jacket is filled with antifreeze and helps keep the engine cool. The cylinder head is an aluminum casting and is bolted to the end of the water jacket. It is drilled and tapped for a spark plug, valves, carburetor and exhaust.

The carburetor design is similar to those used on model airplanes and boats. The fuel flow is controlled independently by an adjustable needle valve. The air intake is controlled by an adjustable throttle barrel. The two are tied together so that when the throttle is opened the needle valve also opens slightly letting in more fuel for increased speed. The idle air mixture is also adjustable.

The gas tank is made from a short length of 2" diameter exhaust pipe... We use the same type of fuel to power the engine as is used in lanterns and camp stoves. All of the components of the engine are mounted on a cast aluminum base measuring 10-5/8" x 7-1/8"....

Reupload: Since all Gingery series ebook ... none are active

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