Rider Ericsson Hot Air Engine

Rider Ericsson Hot Air Engine

Craftsman: Roger Butzen

Knapp Collection #: 754

Catalog #: 2024.5.1

Contributor: Paul Knapp

This Rider Ericsson hot air engine was built by Roger Butzen of Texas.

Rider-Ericsson Hot Air Pump Engine

Rider-Ericsson Hot Air Pump Engine

Craftsman: Bill Fowler

Catalog #: 2010.7.1 

Donor: Les Cade 

This 1/4-scale Rider-Ericsson hot air pump engine was made from castings by Myers Engine Works and then expertly machined and painted.

Riggle 4-Cylinder Inline Engine 

Riggle 4-Cylinder Inline Engine 

Craftsman: Jim Riggle

Knapp Collection #: 695

Catalog #: 2022.8.6

Contributor: Paul Knapp

This Riggle 4-cylinder inline engine is 9.5″-long, 7″-wide, 7.5″-inches tall, and is mounted on a running stand that houses all necessary accessories to run and monitor the engine.

Riggle NOVI DOHC 1/4 Scale Sprint Car

Riggle NOVI DOHC 1/4 Scale Sprint Car

Craftsman: Jim Riggle

Knapp Collection #: 300

Catalog #: 2011.32.14

Contributor: Paul Knapp 

This 1/4 scale Novi V8 sprint car was designed and built by Jim Riggle, of North Dakota, in the mid-1980s. The model car is 37″-long, 16″-wide, and 12″-high. Jim used this sprint car as the test platform for his new model of the NOVI V8 engine.

Robarts R780 7-Cylinder Radial Engine

Robarts R780 7-Cylinder Radial Engine

Craftsman: Bob Walker

Knapp Collection #: 13

Catalog #: 2011.27.3

Contributor: Paul Knapp 

This Robarts R780 7-cylinder radial engine has a bore of 1.125 inches and stroke of 1.125 inches for a total displacement of 7.8 cubic inches.

Rocking Engine

Rocking Engine

Craftsman: Birk Petersen

Catalog #: 2016.15.75

Donor: Mark Petersen

Birk Petersen built this miniature electric rocking engine.

Rodless Rotary Engine

Rodless Rotary Engine

Craftsman: Peter Grunstra

Catalog #: 2013.42.1

Donor: Peter Grunstra

This 2-cycle rodless rotary engine, suitable for aircraft or autos, is a prototype built by Peter Grunstra.

Root & Vandervoort Vertical Gas Engine

Root & Vandervoort Vertical Gas Engine

Craftsman: Russell Anderson 

Catalog #: 2019.21.4

Contributor: Steve Anderson

Several engines built by Russell Anderson, including this Root & Vandervoort vertical gas engine, are on display in the Craftsmanship Museum.

Ross 2-Cylinder, 2-Cycle Target Drone Engine

Ross 2-Cylinder, 2-Cycle Target Drone Engine

Craftsman: Lou Ross

Knapp Collection #: 196

Catalog #: 2008.16.39

Contributor: Paul Knapp

Lou Ross designed and developed this large 3.5 cubic inch opposed twin for possible use as a target drone engine for military applications.

Ross 4-Cylinder, 2-Cycle Target Drone Engine

Ross 4-Cylinder, 2-Cycle Target Drone Engine

Craftsman: Lou Ross

Knapp Collection #: 197

Catalog #: 2008.16.40

Contributor: Paul Knapp

This is a 7.0 cubic inch opposed four-cylinder, two-cycle engine designed to power a target drone. It burns methanol on glow ignition.

Royer Model Airplane Engine

Royer Model Airplane Engine

Craftsman: Royer Motors

Knapp Collection #: 318

Catalog #: 2012.33.3

Contributor: Paul Knapp

This Royer model airplane engine is 7”-long and 7”-high. The engine has a .785 cu. in. displacement and consists of a sand cast crankcase, front cover, and spoke-fin head.

Saito FA-120, 4-Cycle Cutaway Airplane Engine

Saito FA-120, 4-Cycle Cutaway Airplane Engine

Craftsman: Saito Engines

Knapp Collection #: 250

Catalog #: 2011.27.28

Contributor: Paul Knapp 

The Saito FA-120, 4-cycle cutaway model airplane engine was manufactured by Saito Engines of Japan, circa 2000.

Satra “R-5” Model Radial Airplane Engine

Satra “R-5” Model Radial Airplane Engine

Craftsman: Bruce Satra

Knapp Collection #: 202

Catalog #: 2008.16.44

Contributor: Paul Knapp

Intrigued by the Morton M5, Bruce Satra built a more robust design which he dubbed the Satra R-5. The bore is .700 and stroke is .625, making the total displacement 1.2 cubic inches.

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