Page 50 – The Miniature Engineering Craftsmanship Museum

Seidel 770 Engine

Craftsman: Wolfgang Seidel

Knapp Collection #: 15

Catalog #: 2022.8.1

Contributor: Paul Knapp

This Seidel ST770 engine is a 7-cylinder 70cc (4.17 cubic inch) radial engine with a speed range or 1,000 to 6,000 revolutions per minute (rpm), using a 26-10 propeller.

Seidel Prototype Radial Engine

Craftsman: Wolfgang Seidel

Knapp Collection #: 283

Catalog #: 2011.32.5

Contributor: Paul Knapp

This pre-production model, built in the early 1980s, is one of Mr. Seidel’s first prototypes intended to introduce his engines at trade fairs and model airplane shows.

Seidel ST 1426 14-Cylinder Radial Model Aircraft Engine

Craftsman: Wolfgang Seidel

Knapp Collection #: 56

Catalog #: 2008.10.16

Contributor: Paul Knapp

The ST 1426 is the largest engine in the series, and perhaps the largest model airplane engine commercially sold.

Seidel ST 525 5-Cylinder Radial Model Airplane Engine

Craftsman: Wolfgang Seidel

Knapp Collection #: 70

Catalog #: 2008.10.22

Contributor: Paul Knapp

The Seidel ST 525 radial airplane engine is among the largest 5-cylinder model airplane engines built to date.

Seidel ST 540 5-Cylinder Radial Model Aircraft Engine

Craftsman: Wolfgang Seidel

Knapp Collection #: 14

Catalog #: 2008.10.5

Contributor: Paul Knapp

The Seidel ST540 has a speed range of 1,100 to 6,800 revolutions per minute, using a 22-6 propeller.

Seidel ST 726 7-Cylinder Radial Model Aircraft Engine

Craftsman: Wolfgang Seidel

Knapp Collection #: 55

Catalog #: 2008.10.15

Contributor: Paul Knapp

The ST 726 weighs approximately 16 pounds. It burns methanol with castor oil mixed in for lubrication, and swings a 32-12 propeller at 4,500 rpm.

Seidel ST 770 7-Cylinder Radial Model Aircraft Engine

Craftsman: Wolfgang Seidel

Knapp Collection #: 15

Catalog #: 2008.10.6

Contributor: Paul Knapp

The Seidel ST 770 has a speed range or 1,000 to 6, 000 revolutions per minute (rpm), using a 26-10 propeller.

Seidel ST 996 9-Cylinder Radial Model Aircraft Engine

Craftsman: Wolfgang Seidel

Knapp Collection #: 16

Catalog #: 2008.10.7

Contributor: Paul Knapp

The ST 996 9-cylinder 96 cc (5.9 cubic inches) is the largest of three in this series of engines.

Shay Locomotive

Craftsman: Theodore Carder

Catalog #: 2021.11.6

Donor: Susi Trumbo

This scale model Shay locomotive has a number of working mechanisms and can run on compressed air.

Shovelnose Hydro Tether Boat With 2-Cylinder Engine

Craftsman: Unknown

Knapp Collection #: 416

Catalog #: 2016.8.12

Contributor: Paul Knapp

This sleek looking hydro measures 11″-wide, 30.5″-long, and sports a custom built two-cylinder, two-cycle, alternate firing twin with a double throw crank.