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

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

Craftsman: Array

Knapp Collection #: Array

Catalog #: Array

Array: Array

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

Craftsman: Array

Knapp Collection #: Array

Catalog #: Array

Array: Array

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

Craftsman: Array

Knapp Collection #: Array

Catalog #: Array

Array: Array

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

Craftsman: Array

Knapp Collection #: Array

Catalog #: Array

Array: Array

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

“Dominator” Model Aircraft Engine

“Dominator” Model Aircraft Engine

Craftsman: Array

Knapp Collection #: Array

Catalog #: Array

Array: Array

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

Craftsman: Array

Knapp Collection #: Array

Catalog #: Array

Array: Array

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

Craftsman: Array

Knapp Collection #: Array

Catalog #: Array

Array: Array

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.

“Hired Man” Hit N’ Miss Engine

“Hired Man” Hit N’ Miss Engine

Craftsman: Array

Knapp Collection #: Array

Catalog #: Array

Array: Array

This “Hired Man” hit n’ miss engine features a governor in the center of one of the 6″ flywheels, and spark is provided by a Model T Ford ignition coil.

“Little Brother” Hit N’ Miss Engine

“Little Brother” Hit N’ Miss Engine

Craftsman: Array

Knapp Collection #: Array

Catalog #: Array

Array: Array

This “Little Brother” hit n’ miss engine features a governor in the center of one of the flywheels, and spark is provided by a Model T Ford ignition coil.

“Little Brother” Hit N’ Miss Engine

“Little Brother” Hit N’ Miss Engine

Craftsman: Array

Knapp Collection #: Array

Catalog #: Array

Array: Array

This water-cooled “Little Brother” hit n’ miss engine features a governor in the center of one of the 4.5″ flywheels.

“Little Dominator” Model Aircraft Engine

“Little Dominator” Model Aircraft Engine

Craftsman: Array

Knapp Collection #: Array

Catalog #: Array

Array: Array

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

Craftsman: Array

Knapp Collection #: Array

Catalog #: Array

Array: Array

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.