1/6 Scale Cirrus Model Airplane Engine
Craftsman: Charles “Chuck” Harty
Knapp Collection #: 519
Catalog #: 2017.27.14
Contributor: Paul Knapp
This is Chuck Harty’s rendition of the 1/6 scale Cirrus designed by Merritt Zimmerman. It is 7”-long, 6”-high, 3”-wide, and weighs 2 pounds 9 ounces on the aluminum base.
1/6 Scale Gar Wood 33-50 Runabout With V-12 Liberty Engine
Craftsman: Louis Chenot
Catalog #: 2024.2.1
Donor: Louis Chenot
After six years of labor, Louis Chenot completed his scratch-built 1/6 scale Gar Wood 33-50 Runabout with V-12 Liberty marinized 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
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.
1937 Harley-Davidson “Knucklehead” Motorcycle Engine
Craftsman: Replica Engines
Knapp Collection #: 99
Catalog #: 2009.9.13
Contributor: Paul Knapp
This 1/4 scale model 1937 Harley-Davidson “Knucklehead” motorcycle engine is 9”-long, 9”-wide, and 9”-high.
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.
3/10 Scale John Deere “E” 1.5 HP Stationary Engine
Craftsman: Bob Haagenson
Knapp Collection #: 447
Catalog #: 2016.8.25
Contributor: Paul Knapp
Among the many engines Bob Haagenson built is this 3/10 scale John Deere E 1.5 HP stationary engine kitted by Dinky Deeres.
4-Cylinder, Water-Cooled Inline Boat Engine
Craftsman: Unknown
Knapp Collection #: 255
Catalog #: 2011.27.31
Contributor: Paul Knapp
This 4-cycle water-cooled marine engine burns methanol or gasoline on glow ignition and sports an electric starter.
4-Port Riley Model A Racing Engine
Craftsman: Ron Bement
Knapp Collection #: 498
Catalog #: 2016.44.9
Contributor: Paul Knapp
This 4-port Riley Model A racing engine OHV conversion measures 14″-wide, 13″-tall, 18.5″-long, and weighs 25 pounds.
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.
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