J E Special Tether Car
Craftsman: Doug Parker
Knapp Collection #: 578
Catalog #: 2019.10.5
Contributor: Paul Knapp
The J E Special tether car was designed and built by Doug Parker as a tribute to John Ellis; an accomplished tether car builder, racer, and engine designer/builder.
J.I. Case & Co. Steam Traction Engine
Craftsman: Rudy Kouhoupt
Donor: Susan Alvaro
This model traction engine was built by Rudy Kouhoupt at a scale of 3/4”:1’.
James Watt Beam Engine
Craftsman: Birk Petersen
Catalog #: 2016.15.31
Donor: Mark Petersen
Birk’s miniature James Watt beam engine on a model brick base.
James Watt Flyball Governor
Craftsman: Birk Petersen
Catalog #: 2016.15.112
Donor: Mark Petersen
This is a demonstration model of a James Watt designed flyball governor.
Jemma 7-Cylinder Radial Airplane Engine
Craftsman: Charles “Chuck” Harty
Knapp Collection #: 526
Catalog #: 2017.27.11
Contributor: Paul Knapp
Built from construction articles in Strictly IC Magazine, the engine is machined completely from bar stock; there are no castings. It is about 9-inches in diameter and 8-inches long.
JEMMA 7-Cylinder Radial Engine
Craftsman: Bob Haagenson
Knapp Collection #: 358
Catalog #: 2013.53.2
Contributor: Paul Knapp
The JEMMA 7-cylinder radial engine is 13”-long, 9”-wide, 10”-high, and weighs 11 lbs. 6 oz. It has a bore of .750 and stroke of .800.
Jenno 14 Single-Cylinder Model Airplane Engine
Craftsman: Larry Jenno
Knapp Collection #: 194
Catalog #: 2008.16.38
Contributor: Paul Knapp
Larry Jenno’s first homemade engine is this .14 cubic inch, single-cylinder, two-cycle model airplane engine. The engine is 3″-long, 2″-wide, 3″-high, and weighs 8 oz.
John .060 V-Twin Model Engines (Glow and Diesel)
Craftsman: Jan Garcic
Knapp Collection #: 572, 573
Catalog #: 2019.10.1
Contributor: Paul Knapp
These John .060 V-twin model engines were produced in very low quantities. Mr. Garcic geared together two of his .030 single-cylinder engines to produce these .060 “V” style twins.
John Deere Type “E” 1-1/2 HP Stationary Engine
Craftsman: Dettmar Industries
Knapp Collection #: 148
Catalog #: 2008.10.46
Contributor: Paul Knapp
This is a gasoline burning stationary (hit-n’-miss) engine with a 1.8-inch bore and 2-inch stroke, enclosed crankcase, and a make-and-break ignition system.
Johnson F1 Model Outboard With .65 OS engine
Craftsman: AMPS
Catalog #: 2013.49.6
Contributor: Daniel "Buzz" Brunkow
Included here are a Johnson F1 with a .65 OS engine (left), an Evinrude F1 with a .45 OS engine (center), and a Mercury EFI F1 with a .45 K&B powerplant (right).
Joseph Bernay’s 1878 Steam Engine
Craftsman: Birk Petersen
Catalog #: 2016.15.34
Donor: Mark Petersen
This miniature steam engine is based on a design by Joseph Bernay from 1878.
JPX-T240 Turbojet Model Aircraft Engine
Craftsman: Vibraye
Knapp Collection #: 46
Catalog #: 2009.9.05
Contributor: Paul Knapp
By 1992, commercially available miniature jet engines like this JPX-T240 began to appear on the market. This engine burns propane fuel and can produce up to 13 pounds of thrust.
JT 1800 9-Cylinder Radial Model Airplane Engine
Craftsman: John V. Thompson
Knapp Collection #: 145
Catalog #: 2008.10.43
Contributor: Paul Knapp
This 9-cylinder radial engine weighs 28 pounds and has a 1.25-inch (32 mm) bore and a 1-inch (24.8 mm) stroke with a total displacement of 10.8 cu. in. (180 cc).
Jupiter 220 2-Cylinder Opposed Airplane Engine
Craftsman: Farger & Joosten
Knapp Collection #: 68
Catalog #: 2009.9.08
Contributor: Paul Knapp
The Jupiter 220 2-cylinder opposed model airplane engine was manufactured by Farger & Joosten. The engine is 9”-long, 11”-wide, and 6”-high.
Justrite Brass Caver/Miner Carbide Lamp
Craftsman: Justrite
Catalog #: 2013.31.6
Donor: Owen Cade
This is a small Justrite brass caver’s lamp. The headlamp was designed to be worn by cavers and miners.
K-35 Single-Cylinder, Two-Cycle Model Airplane Engine
Craftsman: Fred Kunze
Knapp Collection #: 167
Catalog #: 2008.16.24
Contributor: Paul Knapp
Fred Kunze constructed and sold 39 of his model K-35 airplane engines. The K-35 has a 13/16-inch bore, 3/4-inch stroke, and burns methanol on glow ignition.
K&B .48 Engine
Craftsman: K&B
Catalog #: 2012.19.8
Donor: Joe Bridi
This K&B .48 engine is a glow ignition with remote needle valve, square head. This one is #138 of 4,800 built. It has a gold anodized head and prop ring.
K&B “Ringed Piston” Prototypes
Craftsman: Lud Kading
Knapp Collection #: 619
Catalog #: 2019.33.17
Contributor: Paul Knapp
K&B advertised, but never actually produced a ringed .29 engine. Lud Kading built two experimental prototypes in 1947.
K&B “Twist Head” .60
Craftsman: K&B
Catalog #: 2012.19.6
Donor: Joe Bridi
This K&B “Twist Head” .60 is a glow ignition engine from about 2002 that features a “Combo” pipe.
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