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
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
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
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
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
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
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.
3-Cylinder Radial Steam Engine
Craftsman: Rudy Kouhoupt
This 3-cylinder radial steam engine can also be hooked up to run on compressed air.
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
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
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
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
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
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 Radial Steam Engine
Craftsman: Rudy Kouhoupt
This 5-cylinder radial airplane engine runs on steam, but can also be hooked up to run on compressed air.
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
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
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
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 262 exhibits.