
Schindele Walking Beam Stirling Engine
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As a fill-in project, Ron Schindele turned to this little walking beam Stirling engine that was available as a bar-stock kit from the Grizzly Machine Company.

Schroeder Display of Multi-Cylinder Cox Engines
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Mr. Schroeder was well known for his innovative multi-cylinder engines that utilized Cox .020 and .049 engine parts.

Seidel 770 Engine
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This Seidel ST770 engine is a 7-cylinder 70cc (4.17 cubic inch) radial engine with a speed range or 1,000 to 6,000 revolutions per minute (rpm), using a 26-10 propeller.

Seidel Prototype Radial Engine
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This pre-production model, built in the early 1980s, is one of Mr. Seidel’s first prototypes intended to introduce his engines at trade fairs and model airplane shows.

Seidel ST 1426 14-Cylinder Radial Model Aircraft Engine
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The ST 1426 is the largest engine in the series, and perhaps the largest model airplane engine commercially sold.

Seidel ST 525 5-Cylinder Radial Model Airplane Engine
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The Seidel ST 525 radial airplane engine is among the largest 5-cylinder model airplane engines built to date.

Seidel ST 540 5-Cylinder Radial Model Aircraft Engine
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The Seidel ST540 has a speed range of 1,100 to 6,800 revolutions per minute, using a 22-6 propeller.

Seidel ST 726 7-Cylinder Radial Model Aircraft Engine
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The ST 726 weighs approximately 16 pounds. It burns methanol with castor oil mixed in for lubrication, and swings a 32-12 propeller at 4,500 rpm.

Seidel ST 770 7-Cylinder Radial Model Aircraft Engine
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The Seidel ST 770 has a speed range or 1,000 to 6, 000 revolutions per minute (rpm), using a 26-10 propeller.

Seidel ST 996 9-Cylinder Radial Model Aircraft Engine
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The ST 996 9-cylinder 96 cc (5.9 cubic inches) is the largest of three in this series of engines.

Shovelnose Hydro Tether Boat With 2-Cylinder Engine
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This sleek looking hydro measures 11″-wide, 30.5″-long, and sports a custom built two-cylinder, two-cycle, alternate firing twin with a double throw crank.

Silver Angel Vertical Stationary Engine
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This Silver Angel vertical stationary engine was built by Ramon Hoagland, of Colorado, in 2017.

Single-Cylinder .60 Model Airplane Engine
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This single-cylinder air-cooled .60 size engine was machined from aluminum and steel bar stock and designed to burn methanol on spark ignition.

Single-Cylinder OHC Air-Cooled Demonstration Engine
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This. single-cylinder OHC air-cooled demonstration engine was made in Germany in the 1990s. The engine is 8”-long, 16”-wide, 8”-high, and weighs 8 oz.

Single-Cylinder, 4-Cycle Air-Cooled Engine
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This model engine was almost completely machined from aluminum and steel bar stock. The cylinder is a modified 2-cycle cylinder that was converted to operate on this 4-cycle engine.

Single-Cylinder, 4-Cycle Model Airplane Engine
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This single-cylinder, 4-cycle model airplane engine has a 3/4-inch bore, a 1.0-inch stroke, and it burns methanol on glow ignition.

Single-Cylinder, Air-Cooled, Four-Cycle OHV Engine
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The most striking features of this engine are the complexity of the carburetor, and the use of only one threaded stud to mount both the intake and exhaust manifold.

Sir William Horizontal Twin Pumping Engine
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This Sir William horizontal twin pumping engine was made by Ramon Hoagland of Colorado.

SJ-10 Turbojet Engine
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This SJ-10 Turbojet engine was made from a turbocharger with a combustion system added and it runs on propane. Mike provided plans to jet engine enthusiasts worldwide.
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