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.
McCoy .35 “Red Head” Model Airplane Engine
Craftsman: Dick McCoy
Catalog #: 2015.22.1
Donor: Tony Cina
A McCoy .35 “Red Head” model airplane engine with Testors instruction sheet.
McCoy Duro Glo .049 Diesel Model Airplane Engine
Craftsman: Dick McCoy
Catalog #: 2015.22.2
Donor: Tony Cina
A McCoy Duro Glo .049 Diesel model airplane engine with a 7” plastic prop.
McCulloch 2-Cylinder Opposed Drone Engine
Craftsman: McCulloch Motors Corporation
Catalog #: 2011.24.1
Donor: Joe Martin
This Righter-designed two-stroke cycle engine was built to power WWII target drones.
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: 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 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 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.
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.
Miniature 3-Cylinder Radial Engine
Craftsman: Cliff Bumpus
Knapp Collection #: 78
Catalog #: 2009.9.09
Contributor: Paul Knapp
Cliff Bumpus designed and machined this miniature engine from bar stock (aluminum ingots). The cylinders are spaced 120° apart in a circular pattern.
Miniature 7-Cylinder Radial Engine
Craftsman: Lee Root
Knapp Collection #: 101
Catalog #: 2009.9.14
Contributor: Paul Knapp
This miniature 7-cylinder radial engine was machined entirely from bar stock. Mr. Root’s 7-cylinder was ahead of its time and more advanced than most miniature engines made today.
Miniature 7-Cylinder Radial Engine
Craftsman: Pius Job
Knapp Collection #: 86
Catalog #: 2008.16.14
Contributor: Paul Knapp
This engine burns methanol (with oil mixed in for lubrication) on glow ignition and turns a 24-10 propeller at 6,000 rpm. The engine is 10”-long, 9”-wide, and 15”-high (on stand).
Model Craftsman 4-Cycle Airplane Engine
Craftsman: Unknown
Knapp Collection #: 320
Catalog #: 2012.33.5
Contributor: Paul Knapp
This engine has a cast aluminum crankcase and cam box with a machined cast iron cylinder and head.
Model Pratt & Whitney Engine Casting
Craftsman: Paul Knapp
Knapp Collection #: 161
Contributor: Paul Knapp
Paul Knapp assembled castings for his model Pratt & Whitney R-985 Wasp Jr. engine (also on display), and then cut them in half as a visual aid.
Morton M5 5-Cylinder Radial Engine
Craftsman: Morton Aviation
Knapp Collection #: 18
Catalog #: 2009.9.01
Contributor: Paul Knapp
The Morton M5 5-cylinder radial engine was designed and built by Morton Aviation. The M5 was the first miniature radial engine made for model airplanes.
Morton M5 Radial Model Aircraft Engine (cutaway)
Craftsman: Dennis Fadden
Knapp Collection #: 20
Catalog #: 2008.10.8
Contributor: Paul Knapp
A Morton M5 radial model aircraft engine (cutaway). The engine is 7″-long, 6″-wide, and 7″-high.
MVVS 3209 2.5 cc Diesel Engine
Craftsman: MVVS
Catalog #: 2008.22.1
Donor: Robert Meltzer
This small MVVS .15 (2.5 cc) Diesel engine was made in Czechoslovakia, probably in the 1960s, and the brand has remained popular for those flying RC models in the “vintage” categories.
Mystery Engine
Craftsman: Unknown
Donor: Joe Martin
The crankcase of this unidentified engine appears to be custom machined from billet stock. The head may be from an existing engine.
Nano Bee Single-Cylinder Model Airplane Engine
Craftsman: Chris Hans Valentine and Ronald Valentine
Knapp Collection #: 274
Catalog #: 2011.27.7
Contributor: Paul Knapp
The Nano Bee measures merely 7/8 of an inch long with a bore and stroke of only 2mm, adding up to a total displacement of only .006cc.
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