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.
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
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.
Satra 0-440, 4-Cylinder Opposed Model Aircraft Engine
Craftsman: Bruce Satra
Knapp Collection #: 63
Catalog #: 2008.16.09
Contributor: Paul Knapp
Bruce Satra, of Utah, engineered and fabricated this 40 cc, 4-cylinder opposed model aircraft engine in the mid-1980s.
Satra 0-440, 4-Cylinder Opposed Model Airplane Engine
Craftsman: Bruce Satra
Knapp Collection #: 203
Catalog #: 2008.16.45
Contributor: Paul Knapp
This 0-440 differs from Bruce Satra’s first version in that it burns gasoline on spark ignition rather than methanol on glow ignition. The engine is 11″-long, 8″-wide, and 7″-high.
Schillings 3-Cylinder (FAN) Engine
Craftsman: Hubert Schillings
Knapp Collection #: 88
Catalog #: 2011.35.3
Contributor: Paul Knapp
This 3-cylinder (fan-configuration) Dual Overhead Cam (DOHC) engine has all cylinders above the center line but uses a master rod and 2 articulating rods like a radial engine.
Schillings 4-Cylinder Inline DOHC Engine
Craftsman: Hubert Schillings
Knapp Collection #: 73
Catalog #: 2008.16.11
Contributor: Paul Knapp
This engine, which was completed in 1975, is 11”-long, 6”-wide, 6”-high, and weighs 7 lbs. 2 oz. The 4-cylinder inline dual overhead cam (DOHC) engine has cylinders in a row vertical to the crankshaft.
Schillings 4-Cylinder Inline SOHC Engine
Craftsman: Hubert Schillings
Knapp Collection #: 218
Catalog #: 2011.27.19
Contributor: Paul Knapp
This 4-cylinder inline single overhead cam (SOHC) has cylinders in a row vertical to the crankshaft. The engine is 12″-long, 8″-wide, 6″-high, and weighs 5 lbs.
Schillings 6-Cylinder DOHC Engine
Craftsman: Rolf Luther
Knapp Collection #: 185
Catalog #: 2008.16.33
Contributor: Paul Knapp
This 6-cylinder inline Dual Overhead Cam (DOHC) design has cylinders laid out in a straight line with two camshafts that operate the valves.
Schillings 6-Cylinder Opposed DOHC Engine
Craftsman: Hubert Schillings
Knapp Collection #: 119
Catalog #: 2009.9.20
Contributor: Paul Knapp
Hubert Schillings designed several miniature engines. Made in 1975, this opposed DOHC engine is 9”-long, 9”-wide, and 7”-high.
Schillings V-Twin DOHC Engine
Craftsman: Hubert Schillings
Knapp Collection #: 89
Catalog #: 2011.35.4
Contributor: Paul Knapp
This 2-cylinder “V” Dual Overhead Cam (DOHC) has cylinders 90 degrees apart and in line with the crankshaft, similar to a V6 or V8 configuration.
Schillings V8 DOHC Engine
Craftsman: Hubert Schillings
Knapp Collection #: 239
Catalog #: 2011.27.22
Contributor: Paul Knapp
This V8 Dual Overhead Cam engine has two rows of cylinders 90 degrees apart. Each row has two camshafts to operate the valves.
Schindele Cube 4-Cycle Engine
Craftsman: Ron Schindele
Knapp Collection #: 568
Catalog #: 2019.9.8
Contributor: Paul Knapp
This engine is appropriately named the Cube because it is a 1 x 1 bore and stroke and, simply, a square design.
Schindele Custom 2-Stroke Diesel Engine
Craftsman: Ron Schindele
Knapp Collection #: 726
Catalog #: 2022.8.10
Contributor: Paul Knapp
One unique feature of this Schindele custom 2-stroke Diesel engine is an extra set of interchangeable parts designed to convert the engine to gasoline operation.
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