Cooney .61 Engine (Rear Port)
Craftsman: Ralph Cooney
Catalog #: 2012.7.3 and 2012.7.5
Donor: Ralph Cooney
Another rear exhaust port design, this one did not include a cast-in carburetor body. The rear exhaust port was angled upward and had a rotary restrictor plate.
Cooney .61 Engine (Side Port)
Craftsman: Ralph Cooney
Catalog #: 2012.7.4
Donor: Ralph Cooney
This engine design of Ralph Cooney’s incorporates a side exhaust port with a T-shaped bypass and a two-piece crankcase.
Cooney Bourke .09 Model Airplane Engine
Craftsman: Ralph Cooney
Catalog #: 2013.2.1
Donor: Ralph Cooney
The Bourke engine was developed as a super-efficient, high power per weight engine for automobiles.
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.
Cox .049 Engine
Craftsmen: Leroy Cox, L.M. Cox Manufacturing
Catalog #: 2012.29.4
Contributor: Andy Moore
This Cox .049 engine includes a pull start and centrifugal clutch. A retractible starter cord makes starting this engine easier (and safer) than turning the prop on an airplane engine.
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.
Cox Tee Dee .09 Engine
Craftsmen: Leroy Cox, L.M. Manufacturing Company
Catalog #: 2012.23.2
Donor: Joe Bridi
This is the smallest of the Cox “Tee Dee” engine series. It turns up to 30,000 RPM with a 3 x 1.25 prop.
Cox Thimble Drome .049 Engine
Craftsman: Leroy Cox
Catalog #: 2012.29.3
Contributor: Andy Moore
This reed valve engine features a rear carburetor fed from a remote fuel tank rather than one attached to the engine. It is displayed with a cut-down 4-bladed propeller.
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 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.
Custom Single-Cylinder .60 Model Aero Engine
Craftsman: Charles “Chuck” Harty
Knapp Collection #: 518
Catalog #: 2017.27.10
Contributor: Paul Knapp
This custom single-cylinder .60 model aero engine measures about 5-1/5”-tall, 5”-wide, 6”-long, and weighs 2.5 pounds on the stand.
Custom Twin K&B Model Boat Engine
Craftsman: Daniel "Buzz" Brunkow
Catalog #: 2013.49.13
Contributor: Daniel "Buzz" Brunkow
This two-cylinder boat engine was custom built by Buzz by combining two K&B .40’s driving a single propeller shaft.
Custom-Built OS-MAX Twin Engine
Craftsman: Richard Hoff
Catalog #: 2019.34.2
Donor: Richard Hoff
Richard Hoff made this 2-cylinder engine by combining two single-cylinder engines to create a horizontally opposed twin-cylinder.
Custom-Built Pulse Jet Engine
Craftsman: Reggy Luycx
Knapp Collection #: 562
Catalog #: 2019.33.1
Contributor: Paul Knapp
This custom-built pulse jet engine was made by Reggy Luycx, BE, in 2005.
Custom-Built Webra 10 Twin Engine
Craftsman: Richard Hoff
Catalog #: 2019.34.1
Donor: Richard Hoff
Richard Hoff has built a pair of custom 2-cylinder engines. He made these by combining two single-cylinder engines to create a horizontally opposed twin-cylinder.
Cylindrical Rotary Engine
Craftsman: Alphonse C. Vassallo
Knapp Collection #: 234
Catalog #: 2009.9.39
Contributor: Paul Knapp
This cylindrical rotary engine is 7″-long, 5″-wide, 3.5″-high, and weighs 5 lbs. Internally, the engine resembles a positive-flow (vane type) rotary pump.
de Havilland Gipsy I 4-Cylinder Inline Engine
Craftsman: Pat Loop
Knapp Collection #: 43
Catalog #: 2008.10.11
Contributor: Paul Knapp
Pat Loop handcrafted this 1/4 scale Gipsy engine right down to the spark plugs. It runs on gasoline with spark ignition.
Deezil .049 Engine
Craftsman: Deezil
Catalog #: 2012.19.9
Donor: Joe Bridi
This small .049 Diesel engine is bolted onto a cast metal base. The engine was made in Eastern Europe.
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