Little Devil Vertical Stationary Engine
Craftsman: Michael Barker
Knapp Collection #: 612
Catalog #: 2019.33.9
Contributor: Paul Knapp
This Little Devil vertical stationary engine measures 8-inches long, 5-1/2-inches wide, and 8-inches tall. It sports a pair of 2-5/8-inch diameter flywheels.
Lo-Boy Cox .049 Tether Car
Craftsman: Doug Parker
Knapp Collection #: 407
Catalog #: 2016.8.8
Contributor: Paul Knapp
This “Lo-Boy” Cox .049 tether car was crafted from aluminum and steel and sports a finely finished wooden body.
Loop Aircraft Tachometer
Craftsman: Pat Loop
Knapp Collection #: 22
Catalog #: 2008.16.04
Contributor: Paul Knapp
This 1/4 scale aircraft tachometer was designed and built by Pat Loop in 1995. It displayed accurate readings from 0 to 7,000 rpm.
Loyal Cycle Engine
Craftsman: Ron Schindele
Knapp Collection #: 587
Catalog #: 2019.10.10
Contributor: Paul Knapp
Ron Schindele designed and built the engine after reading an article about Loyal Cycle engines by Edgar T. Westbury in Model Engine News magazine.
Loyal Cycle Engine
Craftsman: Ron Schindele
Knapp Collection #: 629
Catalog #: 2020.4.2
Contributor: Paul Knapp
This Loyal Cycle engine runs on gasoline vapor or propane with electronic spark ignition, and it has only three moving parts.
Luhrs Mini Single-Cylinder 4-Cycle Engine
Craftsman: George Luhrs
Knapp Collection #: 93
Catalog #: 2008.10.29
Contributor: Paul Knapp
George Luhrs’ mini single-cylinder engine has a bore and stroke of just 1/8 of an inch. The engine is 6″-long, 3″-wide, and 6″-high.
Magnum 182 V-Twin Model Airplane Engine
Craftsman: Peter Roffe and Brian Stammer
Knapp Collection #: 137
Catalog #: 2009.9.22
Contributor: Paul Knapp
Peter Roffe and Brian Stammer combined two-cylinder assemblies from their single-cylinder 91S to make this 90° V-twin 182.
Magnum 273 3-Cylinder Radial Engine
Craftsman: Peter Roffe and Brian Stammer
Knapp Collection #: 138
Catalog #: 2009.9.23
Contributor: Paul Knapp
This Magnum 273 3-cylinder radial model airplane engine is 20”-long, 9”-wide, and 9”-high. Three 91S cylinder assemblies were adapted to a common crankcase to produce this 3-cylinder radial 273.
Magpie 2-Cycle Marine Engine
Craftsman: Gerald Smith
Knapp Collection #: 302
Catalog #: 2011.35.9
Contributor: Paul Knapp
The Magpie 2-cycle marine engine is a ducted fan air-cooled marine engine. It is a 15cc spark ignition engine developed for model boats.
Manx 250IL 2-Cylinder Inline Model Airplane Engine
Craftsman: Robert Hoskins
Knapp Collection #: 140
Catalog #: 2008.10.40
Contributor: Paul Knapp
This engine turned 7,500 revolutions per minute with a 20-6 propeller on glow ignition, and flew a 35-pound airplane with ease.
Mason “Mastiff” 4-Cylinder Opposed Engine
Craftsman: T.E. Murphy
Knapp Collection #: 11
Catalog #: 2008.16.03
Contributor: Paul Knapp
This engine burns gasoline on spark ignition. it has a 19 mm bore with a 22.2 mm stroke. The Mastiff is 13”-long, 8”-wide, 9”-high, and weighs 13 lbs.
McCoy Teardrop Tether Car
Craftsman: Dick McCoy
Knapp Collection #: 493
Catalog #: 2016.47.3
Contributor: Paul Knapp
This McCoy Teardrop tether car was designed by Dick McCoy in 1946. Three thousand of these streamliners were sold between 1946 and 1952.
Micro 4-Cycle Single-Cylinder Model Airplane Engine
Craftsman: Ronald Valentine
Knapp Collection #: 244
Catalog #: 2011.32.2
Contributor: Paul Knapp
This air-cooled single-cylinder model airplane engine runs on methanol with glow ignition using custom made glow plugs.
Micro Cirrus 4-Cylinder Inline Engine
Craftsman: Merritt Zimmerman
Knapp Collection #: 60
Catalog #: 2008.10.18
Contributor: Paul Knapp
This Micro Cirrus inline engine runs on methanol with glow ignition, and is among the smallest multi-cylinder 4-cycle engines in the world.
Micro Cirrus 4-Cylinder Inline Engine
Craftsman: Profi M. E.
Knapp Collection #: 61
Catalog #: 2011.35.2
Contributor: Paul Knapp
The Micro Cirrus 4-cylinder inline engine (water-cooled) was built at 1/12 scale. The engine is 5″-long, 6″-wide, and 4″-high.
Micro Cirrus V8 Engine
Craftsman: Merritt Zimmerman
Knapp Collection #: 113
Catalog #: 2011.35.6
Contributor: Paul Knapp
There are two variations of the model Cirrus engine from Ukraine. They run on methanol with glow ignition and are among the smallest multi-cylinder 4-cycle engines in the world.
Micro Dooling 61
Craftsman: John D. Ellis
Knapp Collection #: 153
Catalog #: 2011.27.11
Contributor: Paul Knapp
This miniature Micro Dooling is exactly 1/3-scale, burns methanol on spark ignition, and turns 38,200 revolutions per minute.
Midget Gas Engine
Craftsman: Unknown
Knapp Collection #: 340
Catalog #: 2012.33.15
Contributor: Paul Knapp
The builder of this midget gas engine is unknown. The engine is 9”-long, 6”-wide, and 8.5”-high.
Mike GR6-120 6-Cylinder 2-Cycle Radial Engine
Craftsman: Mike Goldowsky
Knapp Collection #: 111
Catalog #: 2011.35.5
Contributor: Paul Knapp
Mike Goldowsky designed this 6-cylinder 2-cycle engine in an attempt to make a powerful radial engine that would be economically attractive to the average modeler.
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