![.040 Opposed 2-Cylinder, 2-Cycle Aero Engine](https://craftsmanshipmuseum.com/wp-content/uploads/2022/12/Knapp204-207-125x125.jpg)
.040 Opposed 2-Cylinder, 2-Cycle Aero Engine
Craftsman: John Swartzwelder
Knapp Collection #: 206
Catalog #: 2008.16.49
Contributor: Paul Knapp
John Swartzwelder fabricated several small multi-cylinder aircraft engines from commercially available Cox .049, .020, and .010 cc model airplane engines.
![.098 Opposed 2-Cylinder, 2-Cycle Aero Engine](https://craftsmanshipmuseum.com/wp-content/uploads/2022/12/Knapp204-207-125x125.jpg)
.098 Opposed 2-Cylinder, 2-Cycle Aero Engine
Craftsman: John Swartzwelder
Knapp Collection #: 205
Catalog #: 2008.16.47
Contributor: Paul Knapp
John Swartzwelder fabricated several small multi-cylinder aircraft engines from commercially available Cox .049, .020, and .010 cc model airplane engines.
![.098 Vertical 2-Cylinder, 2-Cycle Aero Engine](https://craftsmanshipmuseum.com/wp-content/uploads/2022/12/Knapp204-207-125x125.jpg)
.098 Vertical 2-Cylinder, 2-Cycle Aero Engine
Craftsman: John Swartzwelder
Knapp Collection #: 204
Catalog #: 2008.16.46
Contributor: Paul Knapp
John Swartzwelder fabricated several small multi-cylinder aircraft engines from commercially available Cox .049, .020, and .010 cc model airplane engines.
![’32 Ford Coupe Tether Car](https://craftsmanshipmuseum.com/wp-content/uploads/2023/01/ePK419a-125x125.jpg)
’32 Ford Coupe Tether Car
Craftsman: Marshall Ziegert
Catalog #: 2016.8.14
Contributor: 419
This ’32 Ford tether car measures about 7 inches wide, 4.25 inches high, 13 inches long, and weighs 6.25 pounds.
![“Dominator” Model Aircraft Engine](https://craftsmanshipmuseum.com/wp-content/uploads/2022/12/PK85a-125x125.jpg)
“Dominator” Model Aircraft Engine
Craftsman: Noel Jensen
Knapp Collection #: 85
Catalog #: 2008.10.26
Contributor: Paul Knapp
To achieve more power, Noel Jensen added two more cylinders and produced this flat 4-cylinder opposed engine dubbed the “Dominator.”
![“Green Dragon” Model Airplane Engine](https://craftsmanshipmuseum.com/wp-content/uploads/2022/12/PK132c-125x125.jpg)
“Green Dragon” Model Airplane Engine
Craftsman: John Nuovo
Knapp Collection #: 132
Catalog #: 2008.10.37
Contributor: Paul Knapp
The Green Dragon burns methanol with castor oil mixed in for lubrication on spark ignition. The engine is 7″-long, 5″-wide, and 6″-high.
![“Green Dragon” Model Automobile Engine](https://craftsmanshipmuseum.com/wp-content/uploads/2022/12/PK133c-125x125.jpg)
“Green Dragon” Model Automobile Engine
Craftsman: John Nuovo
Knapp Collection #: 133
Catalog #: 2008.10.38
Contributor: Paul Knapp
This two-cycle, air-cooled Green Dragon automobile engine was named for its green crackle paint finish. This engine is 7″-long, 5″-wide, and 6″-high.
![“KEN” Single-Cylinder, Air-Cooled Marine Engine](https://craftsmanshipmuseum.com/wp-content/uploads/2022/12/Knapp181a-125x125.jpg)
“KEN” Single-Cylinder, Air-Cooled Marine Engine
Craftsman: Dick Pretel
Knapp Collection #: 181
Catalog #: 2008.16.32
Contributor: Paul Knapp
From approximately six sets of castings made by Ken Brennerman in the mid 1930s, this is the only known surviving engine.
![“Little Dominator” Model Aircraft Engine](https://craftsmanshipmuseum.com/wp-content/uploads/2022/12/PK84a-125x125.jpg)
“Little Dominator” Model Aircraft Engine
Craftsman: Noel Jensen
Knapp Collection #: 84
Catalog #: 2008.10.25
Contributor: Paul Knapp
A rotary valve, twin-cylinder, air-cooled engine named “Little Dominator.” The 1″-bore and 1.1″-stroke engine turns a 16/6 propeller at 6,000 rpm.
![“Maxse T-Seven” 7-Cylinder Radial Model Airplane Engine](https://craftsmanshipmuseum.com/wp-content/uploads/2022/12/Maxse-Tayler-6-17-01-cropped1-125x125.jpg)
“Maxse T-Seven” 7-Cylinder Radial Model Airplane Engine
Craftsman: Maxse Tayler
Knapp Collection #: 126
Catalog #: 2008.10.36
Contributor: Paul Knapp
Maxse Tayler used the piston and cylinder assemblies from the commercially manufactured Saito 120 model airplane engines to build this 7-cylinder radial.
![“Micro Cirrus” V8 Engine](https://craftsmanshipmuseum.com/wp-content/uploads/2022/12/PK112a-125x125.jpg)
“Micro Cirrus” V8 Engine
Craftsman: Profi M. E.
Knapp Collection #: 112
Catalog #: 2008.10.31
Contributor: Paul Knapp
This 1/12 scale “Micro Cirrus” engine runs on methanol with glow ignition, and is among the smallest multi-cylinder 4-cycle engines in the world.
![“Rasant MK III” Diesel Radial Model Airplane Engine](https://craftsmanshipmuseum.com/wp-content/uploads/2022/12/PK135a-125x125.jpg)
“Rasant MK III” Diesel Radial Model Airplane Engine
Craftsman: Ron Valentine
Knapp Collection #: 135
Catalog #: 2008.10.39
Contributor: Paul Knapp
This “Rasant MKIII” Diesel engine operates like an inline engine. It is 2.5″-long, 3″-wide, and 2″-high.
![“Root Special” DOHC 4-Cylinder Racing Engine](https://craftsmanshipmuseum.com/wp-content/uploads/2022/12/k103-RootFord1-125x125.jpg)
“Root Special” DOHC 4-Cylinder Racing Engine
Craftsman: Lee Root
Knapp Collection #: 104
Catalog #: 2009.9.17
Contributor: Paul Knapp
The “Root Special” is machined entirely from 7075 aluminum bar stock and utilizes no castings. The aluminum parts were clear anodized to produce the color and finish.
![“Sea Lion” 4-Cylinder Water-Cooled Marine Engine](https://craftsmanshipmuseum.com/wp-content/uploads/2022/12/PK124a-125x125.jpg)
“Sea Lion” 4-Cylinder Water-Cooled Marine Engine
Craftsman: Jim Hawk
Knapp Collection #: 124
Catalog #: 2008.10.35
Contributor: Paul Knapp
This tiny marine engine was designed and sold as a casting kit. Jim Hawk made several modifications to the original design to improve efficiency and performance.
![“So What Speed Shop” OS Powered Tether Car](https://craftsmanshipmuseum.com/wp-content/uploads/2023/01/ePK421a-125x125.jpg)
“So What Speed Shop” OS Powered Tether Car
Craftsman: Chris Garcia
Knapp Collection #: 421
Catalog #: 2016.8.16
Contributor: Paul Knapp
This aluminum tether car was custom-built by Chris Garcia for Ed Hegarty and sports Chris’s custom wire wheels.
![“Double Scotch” Scotch Yoke Steam Engine](https://craftsmanshipmuseum.com/wp-content/uploads/2024/06/763Knapp-125x125.png)
“Double Scotch” Scotch Yoke Steam Engine
Craftsman: Roger Butzen
Knapp Collection #: 763
Catalog #: 2024.5.9
Contributor: Paul Knapp
This “Double Scotch,” Scotch Yoke steam engine was built in the mid-1990s by Roger Butzen.
![“Eldon I 2636” 6-Cylinder Inline Model Boat Engine](https://craftsmanshipmuseum.com/wp-content/uploads/2022/12/PK189a-125x125.jpg)
“Eldon I 2636” 6-Cylinder Inline Model Boat Engine
Craftsman: Jim Hawk
Knapp Collection #: 189
Catalog #: 2008.10.52
Contributor: Paul Knapp
This engine is water-cooled (including the exhaust), sports a 120-degree crankshaft, and burns methanol on glow ignition. It measures 13″- long, 7″-wide, and 7″-high.
![“Gannet” Single-Cylinder, Water-Cooled Marine Engine](https://craftsmanshipmuseum.com/wp-content/uploads/2022/12/Knapp180a-125x125.jpg)
“Gannet” Single-Cylinder, Water-Cooled Marine Engine
Craftsman: Gannet Engines; Modified by Dick Pretel
Knapp Collection #: 180
Catalog #: 2008.16.31
Contributor: Paul Knapp
Dick Pretel modified the popular Gannet marine engine to suit his performance demands. His newly designed head included four valves and an extra exhaust pipe for better breathing.
![“Iron Maiden” Steam Traction Engine](https://craftsmanshipmuseum.com/wp-content/uploads/2022/12/Knapp11-242-125x125.jpg)
“Iron Maiden” Steam Traction Engine
Craftsman: Stephen J. King
Knapp Collection #: 242
Catalog #: 2011.27.23
Contributor: Paul Knapp
The “Iron Maiden” steam traction engine is a reversible double acting engine with a .4-inch bore, 1.25-inch stroke, and a 25:1 drive ratio with a clutch.
Showing 20 of 391 exhibits.