100cc 2-Cylinder Opposed Aircraft Engine

100cc 2-Cylinder Opposed Aircraft Engine

Craftsman: Unknown

Knapp Collection #: 187

Catalog #: 2008.16.35

Contributor: Paul Knapp

Commercially available cylinders, possibly from a motorcycle, were used to produce this aircraft engine in Germany.

14-Cylinder, Twin-Row Radial Engine

14-Cylinder, Twin-Row Radial Engine

Craftsman: Dennis Fadden

Knapp Collection #: 04

Catalog #: 2008.16.01

Contributor: Paul Knapp

This 1/8 scale 14-cylinder radial engine model operates on regular gasoline with spark ignition and swings a 12-inch diameter propeller.

18-Cylinder, Two-Row Radial Engine

18-Cylinder, Two-Row Radial Engine

Craftsman: Harold Beckett

Knapp Collection #: 41

Catalog #: 2008.16.06

Contributor: Paul Knapp

Harold Beckett handcrafted this 1/4 scale engine from drawings provided by Sam and Lee Hodgeson. The engine operates on regular gasoline with dual spark ignition.

2-Cylinder Opposed Model Airplane Engine

2-Cylinder Opposed Model Airplane Engine

Craftsman: Barry Robinson

Knapp Collection #: 144

Catalog #: 2008.10.42

Contributor: Paul Knapp

This engine has a bore of 19 mm and a stroke of 19.2 mm for a total displacement of 10.9 cc. The cylinders have chrome plated brass liners, and the pistons have compression rings.

2-Cylinder Opposed Model Airplane Engine

2-Cylinder Opposed Model Airplane Engine

Craftsman: Alphonse C. Vassallo

Knapp Collection #: 231

Catalog #: 2009.9.36

Contributor: Paul Knapp 

This two-cylinder, four-cycle engine is completely machined from steel and aluminum bar stock, including Al’s custom-designed carburetor.

252 Single-Cylinder Model Airplane Engine 

252 Single-Cylinder Model Airplane Engine 

Craftsman: Suevia

Knapp Collection #: 220

Catalog #: 2009.9.30 

Contributor: Paul Knapp

The Suevia 252 single-cylinder model airplane engine was designed and built in the 1980s. The engine is 6”-long, 3.5”-wide, and 6”-high.

3-Cylinder Radial Model Airplane Engine

3-Cylinder Radial Model Airplane Engine

Craftsman: Unknown

Knapp Collection #: 175

Catalog #: 2008.16.28

Contributor: Paul Knapp

This radial engine features a single rocker box that houses both the intake and exhaust rockers, and uses only one large tube to enclose both pushrods.

3-Cylinder Radial Model Airplane Engine

3-Cylinder Radial Model Airplane Engine

Craftsman: 3W Engines

Knapp Collection #: 12

Catalog #: 2011.27.2

Contributor: Paul Knapp 

This spark-ignition 2-cycle engine is composed of three single-cylinder engines geared together within one common crankcase.

5-Cylinder Diesel Radial Engine

5-Cylinder Diesel Radial Engine

Craftsman: Ronald Valentine

Knapp Collection #: 253

Catalog #: 2011.27.8

Contributor: Paul Knapp

This is perhaps the smallest Diesel radial engine in the world with a bore of only 5mm and a stroke of 5mm; total displacement of .49ccm.

5-Cylinder Radial Aircraft Engine

5-Cylinder Radial Aircraft Engine

Craftsman: Roger Paul

Knapp Collection #: 254

Catalog #: 2011.27.32

Contributor: Paul Knapp 

Mr. Paul used a few Morton M5 parts to construct three of these 5-cylinder radial engines between 1978-1981.

5-Cylinder Radial Airplane Engine

5-Cylinder Radial Airplane Engine

Craftsman: Miniature Aircraft Corporation of New York

Knapp Collection #: 291

Catalog #: 2011.32.11

Contributor: Paul Knapp 

In 1931, the Miniature Aircraft Corporation of New York advertised a compressed air four-cylinder radial engine made from aluminum alloy with brass heads.

5-Cylinder Radial Model Aircraft Engine

5-Cylinder Radial Model Aircraft Engine

Craftsman: Henry Parohl

Knapp Collection #: 107 

Catalog #: 2009.9.18 

Contributor: Paul Knapp 

This 5-cylinder radial model aircraft engine was designed and built by Henry Parohl circa 1960. The engine is 11”-long, 10”-wide, and 9”-high.

5-Cylinder Radial Model Airplane Engine

5-Cylinder Radial Model Airplane Engine

Craftsman: Barry Robinson

Knapp Collection #: 143

Catalog #: 2008.10.41

Contributor: Paul Knapp

This is an all-aluminum bar stock engine with a bore of 19 mm, stroke of 19.2 mm and a total displacement of 27.21 cc.

5-Cylinder Radial Model Airplane Engine

5-Cylinder Radial Model Airplane Engine

Craftsman: Alphonse C. Vassallo

Knapp Collection #: 235

Catalog #: 2009.9.40

Contributor: Paul Knapp 

It took about a year to design and build this 5-cylinder radial engine, including the carburetor, which incorporates a built-in choke mechanism. It is completely machined from aluminum and steel bar stock.

5-Cylinder, 4-Cycle Radial Engine

5-Cylinder, 4-Cycle Radial Engine

Craftsman: Ronald Valentine

Knapp Collection #: 246

Catalog #: 2011.32.4

Contributor: Paul Knapp 

This 5-cylinder, 4-cycle radial engine runs on methanol with glow ignition using custom made glow plugs. It measures 3.25-inches in diameter.

6-Cylinder Experimental Rotary Engine

6-Cylinder Experimental Rotary Engine

Craftsman: Bell Lab Engineers and J.W. Kijowski

Knapp Collection #: 265

Catalog #: 2011.27.36

Contributor: Paul Knapp 

Little is known about this “proof of concept” 6-cylinder experimental rotary engine. The cylinders are arranged in two rows of three, and the rows are staggered.

77 Products/Merco .61 Engine

77 Products/Merco .61 Engine

Craftsman: 77 Products

Catalog #: 2012.19.12

Donor: Joe Bridi

This engine was made in the U.S. by 77 Products using a British Merco 61 crankcase and innards. The polished head is the main difference from the standard engine.

ADC Cirrus Engine

ADC Cirrus Engine

Craftsman: Eric Whittle

Knapp Collection #: 304

Catalog #: 2016.8.1a

Contributor: Paul Knapp

This 1/9 scale model ADC (or ACE) Cirrus airplane engine won first place at the North American Model Engineering Show (NAMES) in Wyandotte, MI.

Showing 20 of 263 exhibits.

Presented by The Joe Martin Foundation for Exceptional Craftsmanship