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
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
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
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.
Ringbom Hot Air Engine
Craftsman: Birk Petersen
Catalog #: 2016.15.61
Donor: Mark Petersen
A miniature Ringbom hot air 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.
Robert Stirling’s First Engine
Craftsman: Birk Petersen
Catalog #: 2016.15.35
Donor: Mark Petersen
Birk built this model of Robert Stirling’s first hot air engine. It has a brick façade on the metal housing.
Robert Stirling’s Fourth Engine
Craftsman: Birk Petersen
Catalog #: 2016.15.24
Donor: Mark Petersen
This is a small model of Robert Stirling’s fourth engine.
Robinson Hot Air Engine Model
Craftsman: Birk Petersen
Catalog #: 2016.15.42
Donor: Mark Petersen
Birk’s model of a Robinson hot air engine.
Rocking Engine
Craftsman: Birk Petersen
Catalog #: 2016.15.75
Donor: Mark Petersen
Birk Petersen built this miniature electric rocking engine.
Rocking Valve Engine
Craftsman: Theodore Carder
Catalog #: 2021.11.5
Donor: Susi Trumbo
A miniature rocking valve engine built by Theodore Carder.
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 2 HP Hit N’ Miss Engine (Full-Size)
Craftsman: Root & Vandervoort; Restored by Bill Fowler
Catalog #: 2011.4.1
Donor: Les Cade
This full-size Root & Vandervoort 2 HP hit n’ miss engine was restored by Bill Fowler, and donated to the museum by Les Cade. The engine can run at 450 rpm, and the serial number is BL1337.
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
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
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
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
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
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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