Clarke 1-Cylinder Trolling Boat Motor
Craftsman: Profi M. E.
Knapp Collection #: 91
Catalog #: 2008.10.27
Contributor: Paul Knapp
A 1/3 scale Clarke 1-cylinder trolling boat motor. The propeller is mounted directly to the crankshaft and the entire engine is submerged under water for cooling.
Clarke 2-Cylinder Trolling Boat Motor
Craftsman: Profi M. E.
Knapp Collection #: 92
Catalog #: 2008.10.28
Contributor: Paul Knapp
Like the 1/3 scale Clarke 1-cylinder engine, the full-size version of this motor, a Clarke 2-cylinder, was originally manufactured in Michigan in the 1930s. It operates in the same manner, with the entire motor operating underwater to keep it cool while air is ducted down through the cast case.
Coholic 3-Cylinder Radial Engine
Craftsman: Andrew Coholic
Knapp Collection #: 37
Catalog #: 2008.16.05
Contributor: Paul Knapp
Andrew Coholic designed and built this tiny 2-cycle radial engine by mounting three Cox .049 engines into a common crankcase. The engines are geared together with a common propeller shaft.
Conley “427” V8
Craftsman: Gary Conley
Knapp Collection #: 315
Catalog #: 2011.35.10
Contributor: Paul Knapp
In 1988-89, Gary Conley fabricated the molds and patterns to produce a casting kit for this 4.27 cubic inch V8 and made it available in several variations.
Conley Small-Block V8 Engine
Craftsman: Paul Knapp
Knapp Collection #: 07
Catalog #: 2008.10.3
Contributor: Paul Knapp
A methanol-burning supercharged small-block V8.
Conley V8 Engine
Craftsman: Gary Conley
Knapp Collection #: 48
Catalog #: 2008.10.14
Contributor: Paul Knapp
Gary Conley built several machined V8 engines. In 1988-89, he fabricated the molds and patterns to produce a casting kit for his V8.
Continental C-85 Opposed Aircraft Engine
Craftsman: Dennis Fadden
Knapp Collection #: 54
Catalog #: 2008.16.08
Contributor: Paul Knapp
Dennis Fadden’s 1/4 scale Continental C-85 is a “true-to-scale” model of the full-size version that was commonly used in light aircraft during the post-World War II period—most notably in the Piper Cub.
Corliss Steam Engine
Craftsman: Ramon Hoagland
Knapp Collection #: 615
Catalog #: 2019.33.12
Contributor: Paul Knapp
This Corliss steam engine was made by Ramon Hoagland, of Colorado, in 2008.
COSWORTH DFV 1/3 Scale Formula 1 V8 Engine
Craftsman: Marcel Bouland
Knapp Collection #: 611
Catalog #: 2019.33.8
Contributor: Paul Knapp
This COSWORTH DFV 1/3 scale Formula 1 V8 engine has a bore of 1-inch and a stroke of .826-inch for a total capacity of 4.64 cubic inches.
Coupster Tether Car
Craftsman: Doug Parker
Knapp Collection #: 486
Catalog #: 2016.44.2
Contributor: Paul Knapp
The Coupster was machined from solid 6061 aluminum and measures 8-1/8″-long, 1-7/8″-wide, 2-5/8″-high, and weighs 16.5 ounces.
Cox .75 5-Cylinder Radial Engine
Craftsman: Paul Daniels
Knapp Collection #: 26
Catalog #: 2011.27.5
Contributor: Paul Knapp
This Cox .75 radial aircraft engine is 7″-long, 8″-wide, 9″-high, and weighs 7 lbs. 8 oz. The “Cox .75” consists of five Cox .15 cubic-inch engines geared together.
Cretors Flyball Steam Engine
Craftsman: Ramon Hoagland
Knapp Collection #: 693
Catalog #: 2022.8.4
Contributor: Paul Knapp
This Cretors flyball steam engine was built by Ramon Hoagland.
Cretors Oscillating Steam Engine
Craftsman: Ramon Hoagland
Knapp Collection #: 692
Catalog #: 2022.8.3
Contributor: Paul Knapp
This Cretors oscillating steam engine was made by Ramon Hoagland.
Cricket Tether Car
Craftsman: Doug Parker
Knapp Collection #: 549
Catalog #: 2019.9.2
Contributor: Paul Knapp
This tether car was designed by Doug Parker, and everything was custom-built around the tiny Cox .010 engine. It measures 5”-long with a 3-7/16” wheel base.
Curtiss OX-5 V8 Model Airplane Engine
Craftsman: Replica Engines
Knapp Collection #: 17
Catalog #: 2011.27.4
Contributor: Paul Knapp
This is a 1/4 scale miniature of the Curtiss OX-5 water-cooled V8 used in the standard Curtiss J.N. “Jenny” aircraft.
Custom 2-Cylinder Steam Engine
Craftsman: Builder unknown; Restored by Ron Schindele
Knapp Collection #: 604
Catalog #: 2019.33.5
Contributor: Paul Knapp
This small steam engine measures 6-1/2-inches long (including the crankshaft), 2-7/8-inches wide, 7-inches tall, and sports a 3-inch flywheel.
Custom 2-Stroke Vapor Engine
Craftsman: Roger Butzen
Knapp Collection #: 764
Catalog #: 2024.5.10
Contributor: Paul Knapp
Roger Butzen built this custom 2-stroke vapor engine in the late 1990s.
Custom 5-Cylinder Radial Airplane Engine
Craftsman: Charles “Chuck” Harty
Knapp Collection #: 527
Catalog #: 2017.27.12
Contributor: Paul Knapp
Chuck’s custom 5-cylinder radial engine resembles the Morton M5 but measures 8” in diameter, 8”-long, and weighs 6 pounds 5 ounces on the base.
Custom Engineered 2-Cylinder Hit N’ Miss Engine
Craftsman: Ramon Hoagland
Knapp Collection #: 546
Catalog #: 2017.27.2
Contributor: Paul Knapp
This custom engineered 2-cylinder hit n’ miss engine measures 11.5”-long, 8.5”-wide, 8”-high. It has a bore of 1” and a stroke of 1.5” for a total displacement of 2.4 cubic inches.
Showing 20 of 391 exhibits.