Page 63 – The Miniature Engineering Craftsmanship Museum

Wall Clock Dollhouse

Craftsman: Joe and Jan Haring

Catalog #: 2013.17.10

Donor: Jan Haring

This small wall clock has had the pendulum replaced by four miniature rooms, one above the other.

Wall Duplex Mariner

Craftsman: Elmer A. Wall

Knapp Collection #: 79

Catalog #: 2008.16.13

Contributor: Paul Knapp

This Duplex Mariner engine, circa 1940-41, is 9”-long, 6”-wide, and 8”-high.

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

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 Engine Casting Kit

Craftsman: Elmer Wall

Catalog #: 2011.29.1

Donor: Fred Zimmerman

An unfinished casting kit for a Wall Wizard engine, which was designed and produced by Elmer Wall.

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

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

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.

Wankel Engine Demonstration Model

Craftsman: Ingersoll Rand

Catalog #: 2012.9.1

Donor: Louis Chenot

This small model demonstrates how a 2-rotor Wankel rotary engine functions.

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.