Miller DOHC Water-Cooled 2-Cylinder Race Engine
Craftsman: Ed Miller
Knapp Collection #: 478
Catalog #: 2016.8.30
Contributor: Paul Knapp
Suitable for a radio-controlled car or boat, Ed Miller’s first engine is this dual-overhead-cam (DOHC) single with a bore of 1″ and a stroke of 1.25″.
Miniature .020 Outboard Motor
Craftsman: Daniel "Buzz" Brunkow
Catalog #: 2013.41.2
Contributor: Daniel "Buzz" Brunkow
Daniel Brunkow custom built this .020 outboard boat motor based on a Cox engine.
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: 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).
Miniature 7-Cylinder Radial Engine
Craftsman: Pierre Blais
Knapp Collection #: 83
Catalog #: 2009.9.11
Contributor: Paul Knapp
This 7-cylinder radial engine burns a methanol/castor oil mixture on glow ignition. The engine is 10”-long, 11”-wide, and 12”-high.
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 Flash Steam Engine
Craftsman: Unknown
Knapp Collection #: 371
Catalog #: 2016.8.5
Contributor: Paul Knapp
The builder and date for this miniature flash steam engine are unknown. All of the castings are iron and have numbers on them indicating it might have been built from a kit.
Miniature Hit-n-Miss Engine
Craftsman: Phillip Duclos
Catalog #: 2015.11.1
Donor: Jon Harting
This miniature hit-n-miss engine is remarkably tiny and was featured in the book, The Shop Wisdom of Phillip Duclos.
Miniature Hit-n-Miss Engine
Craftsman: Phillip Duclos
Catalog #: 2015.11.2
Donor: Jon Harting
This tiny hit-n-miss engine was being built as a scaled down version of an engine that Mr. Duclos had previously made.
Miniature SJ7 Pulsejet Engine
Craftsman: Mike Early
Knapp Collection #: 40
Catalog #: 2008.10.10
Contributor: Paul Knapp
This miniature pulsejet engine operates exactly like the V1. It burns regular gasoline and has a variable thrust range from 1/2 to 6 1/2 pounds.
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 Jet Turbine Engine
Craftsman: Paul White
Catalog #: 2003.2.1
Donor: Paul White
Mr. White scratch-built this running jet engine in about one month without the use of CNC machining. A scale engine stand is included.
Morton M-42 4-Cylinder Flathead Model Car Engine
Craftsman: Jim Hawk
Knapp Collection #: 158
Catalog #: 2008.10.47
Contributor: Paul Knapp
This Morton M-42 burns gasoline on spark ignition and will turn a 14-6 propeller in excess of 6,500 RPM. The engine is 9″-long, 5″-wide, and 5″-high.
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.
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.
Nash 25 HP Vertical Twin Engine
Craftsman: Ramon Hoagland
Knapp Collection #: 583
Catalog #: 2019.10.6
Contributor: Paul Knapp
Ramon Hoagland used Doug Kelley’s plans to build this 1/18 scale model of the NASH 25 HP vertical twin. It is a water-cooled single throw, alternate firing two-cylinder.
Neptune AA1 Outboard Boat Motor
Craftsman: Muncie Gear Works
Knapp Collection #: 352
Catalog #: 2012.33.19
Contributor: Paul Knapp
The Neptune AA1 outboard boat motor is a 1.7 HP model. It’s a water-cooled, two-cycle gas burner that measures barely 23-inches tall.
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