![Wall F Head Inline 4-Cylinder Engine](https://craftsmanshipmuseum.com/wp-content/uploads/2023/01/592-WallFHeadInline4.1-125x125.jpg)
Wall F Head Inline 4-Cylinder Engine
Craftsman: Dick Pretel
Knapp Collection #: 592
Catalog #: 2019.11.5
Contributor: Paul Knapp
This highly modified Wall F Head inline 4-cylinder sports a side-valve exhaust and an overhead valve intake system.
![Wall OHV Inline 4-Cylinder Engine](https://craftsmanshipmuseum.com/wp-content/uploads/2023/01/590-Wall-OHV-Inline1-125x125.jpeg)
Wall OHV Inline 4-Cylinder Engine
Craftsman: Dick Pretel
Knapp Collection #: 590
Catalog #: 2019.11.3
Contributor: Paul Knapp
This Wall OHV inline 4-cylinder engine was made by Dick Pretel. All of the components, other than the crankcase, were machined from 7075 aluminum, steel, stainless steel, and thermoplastic.
![Wall Wizard Opposed Twin Engine](https://craftsmanshipmuseum.com/wp-content/uploads/2024/06/757Knapp-125x125.png)
Wall Wizard Opposed Twin Engine
Craftsman: Roger Butzen
Knapp Collection #: 757
Catalog #: 2024.5.4
Contributor: Paul Knapp
Roger Butzen, of Texas, built this Wall Wizard opposed twin engine.
![Wall Wizard Water-Cooled 4-Cycle Model Boat Engine](https://craftsmanshipmuseum.com/wp-content/uploads/2022/12/Knapp11-262-Wall-H20-125x125.jpg)
Wall Wizard Water-Cooled 4-Cycle Model Boat Engine
Craftsman: Dick Pretel
Knapp Collection #: 262
Catalog #: 2011.27.34
Contributor: Paul Knapp
Mr. Pretel built this engine from a standard Wall Wizard casting kit, but modified the cylinders for water cooling instead of air.
![Wankel (Mazda Type) Rotary Engine](https://craftsmanshipmuseum.com/wp-content/uploads/2022/12/Knapp123a-125x125.jpg)
Wankel (Mazda Type) Rotary Engine
Craftsman: Henry Parohl
Knapp Collection #: 123
Catalog #: 2008.16.19
Contributor: Paul Knapp
This Wankel (Mazda type) rotary engine is a two-cycle that burns gasoline with oil mixed in for lubrication. The engine is 6”-long, 7”-wide, and 6”-high.
![Warner Large Scale 5-Cylinder Radial Aircraft Engine](https://craftsmanshipmuseum.com/wp-content/uploads/2022/12/Knapp11-214a1-125x125.jpg)
Warner Large Scale 5-Cylinder Radial Aircraft Engine
Craftsman: Wally Warner
Knapp Collection #: 214
Catalog #: 2011.27.18
Contributor: Paul Knapp
It took Mr. Warner about two years to produce the molds, the aluminum castings, and to machine all the parts to build this 5-cylinder radial aircraft engine.
![Wasp Jr. Single-Cylinder Model Airplane Engine](https://craftsmanshipmuseum.com/wp-content/uploads/2022/12/Knapp186a-125x125.jpg)
Wasp Jr. Single-Cylinder Model Airplane Engine
Craftsman: Bruce Satra
Knapp Collection #: 186
Catalog #: 2008.16.34
Contributor: Paul Knapp
Bruce Satra combined a Wasp Jr. cylinder assembly to a crankcase he machined from billet to produce this single-cylinder Wasp Jr. engine.
![Whittle Robin Engine](https://craftsmanshipmuseum.com/wp-content/uploads/2023/01/ePK450a-125x125.jpg)
Whittle Robin Engine
Craftsman: Eric Whittle
Knapp Collection #: 450
Catalog #: 2016.8.1b
Contributor: Paul Knapp
The “Robin” engine is Eric Whittle’s custom-made award presented to Jim Schiller for his extraordinary effort, recovery, and the successful return of Mr. Whittle’s Cirrus engine.
![Wright Whirlwind J5 Model Airplane Engine](https://craftsmanshipmuseum.com/wp-content/uploads/2023/01/Wright-Whirlwind-522-125x125.jpg)
Wright Whirlwind J5 Model Airplane Engine
Craftsman: Charles “Chuck” Harty
Knapp Collection #: 522
Catalog #: 2017.27.13
Contributor: Paul Knapp
This Wright Whirlwind J5 model airplane engine was designed by Carl-Eric Olsryd and built by Charles Harty. Castings, gears, and bearings were provided by Mr. Olsryd of Sweden.
![Zimmerman “Cirrus” 4-Cycle V8 Engine](https://craftsmanshipmuseum.com/wp-content/uploads/2022/12/PK67a-125x125.jpg)
Zimmerman “Cirrus” 4-Cycle V8 Engine
Craftsman: Profi M.E.
Knapp Collection #: 67
Catalog #: 2008.10.21
Contributor: Paul Knapp
This 1/6 scale Zimmerman “Cirrus” 4-cycle V8 engine was built by Profi M.E., 2001. This engine includes the addition of 4 cylinders and a geared flywheel instead of a propeller hub.
Showing 11 of 391 exhibits.