Paul Knapp is a true craftsman with a real passion for internal combustion engines. Not only has this passion driven Mr. Knapp to build his own engines, but he has also acquired a massive collection of some of the finest engines from all over the world. Mr. Knapp’s wife, Paula, is also very knowledgeable about the individual engines in the collection. Paula has always been very supportive of Paul’s desire to acquire and display his truly impressive collection of the best engines from across the globe.

Over the past few decades, the Knapp’s have put together a collection of over 300 of the finest, most significant model engines to be found. As part of Paul’s Miniature Engineering Museum, the engines have been on display at airports and museums around the Western US. Fortunately for us, Paul decided to display the majority of his collection at the Miniature Engineering Craftsmanship Museum in Carlsbad, CA. The display started with just over 50 engines in 2008 and has expanded to include over 200 engines in the past decade plus. View the expansive collection below.

.020 Opposed 2-Cylinder, 2-Cycle Aero Engine

.020 Opposed 2-Cylinder, 2-Cycle Aero Engine

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John Swartzwelder fabricated several small multi-cylinder aircraft engines from commercially available Cox .049, .020, and .010 cc model airplane engines.

.040 Opposed 2-Cylinder, 2-Cycle Aero Engine

.040 Opposed 2-Cylinder, 2-Cycle Aero Engine

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John Swartzwelder fabricated several small multi-cylinder aircraft engines from commercially available Cox .049, .020, and .010 cc model airplane engines.

.098 Opposed 2-Cylinder, 2-Cycle Aero Engine

.098 Opposed 2-Cylinder, 2-Cycle Aero Engine

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John Swartzwelder fabricated several small multi-cylinder aircraft engines from commercially available Cox .049, .020, and .010 cc model airplane engines.

.098 Vertical 2-Cylinder, 2-Cycle Aero Engine

.098 Vertical 2-Cylinder, 2-Cycle Aero Engine

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John Swartzwelder fabricated several small multi-cylinder aircraft engines from commercially available Cox .049, .020, and .010 cc model airplane engines.

’32 Ford Coupe Tether Car

’32 Ford Coupe Tether Car

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This ’32 Ford tether car measures about 7 inches wide, 4.25 inches high, 13 inches long, and weighs 6.25 pounds.

“Dominator” Model Aircraft Engine

“Dominator” Model Aircraft Engine

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To achieve more power, Noel Jensen added two more cylinders and produced this flat 4-cylinder opposed engine dubbed the “Dominator.”

“Green Dragon” Model Airplane Engine

“Green Dragon” Model Airplane Engine

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The Green Dragon burns methanol with castor oil mixed in for lubrication on spark ignition. The engine is 7″-long, 5″-wide, and 6″-high.

“Green Dragon” Model Automobile Engine

“Green Dragon” Model Automobile Engine

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This two-cycle, air-cooled Green Dragon automobile engine was named for its green crackle paint finish. This engine is 7″-long, 5″-wide, and 6″-high.

“Little Dominator” Model Aircraft Engine

“Little Dominator” Model Aircraft Engine

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A rotary valve, twin-cylinder, air-cooled engine named “Little Dominator.” The 1″-bore and 1.1″-stroke engine turns a 16/6 propeller at 6,000 rpm.

“Micro Cirrus” V8 Engine

“Micro Cirrus” V8 Engine

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This 1/12 scale “Micro Cirrus” engine runs on methanol with glow ignition, and is among the smallest multi-cylinder 4-cycle engines in the world.