![Seidel ST 770 7-Cylinder Radial Model Aircraft Engine](https://craftsmanshipmuseum.com/wp-content/uploads/2022/12/PK15a-125x125.jpg)
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](https://craftsmanshipmuseum.com/wp-content/uploads/2022/12/PK16a-125x125.jpg)
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.
![TechnoPower 5-Cylinder Radial Prototype Engine](https://craftsmanshipmuseum.com/wp-content/uploads/2022/12/k184-Techno5a-125x125.jpg)
TechnoPower 5-Cylinder Radial Prototype Engine
Craftsman: Wally Warner
Knapp Collection #: 184
Catalog #: 2009.9.26
Contributor: Paul Knapp
This prototype marked the beginning of a new line of 1/4 scale engines to power large model aircraft. The engine is about 13″ in diameter with a bore of 1.100″ and a stroke of 1.00″.
![Technopower 7-Cylinder Radial Airplane Engine](https://craftsmanshipmuseum.com/wp-content/uploads/2022/12/Knapp11-170-125x125.jpg)
Technopower 7-Cylinder Radial Airplane Engine
Craftsman: Technopower Engines
Knapp Collection #: 170
Catalog #: 2011.27.13
Contributor: Paul Knapp
This Technopower 7-cylinder radial engine (SN B7-151) is 7″-long, 8″-wide, 7″-high, and weighs 2 lbs. 8 oz.
![Technopower II 7-Cylinder Radial Engine](https://craftsmanshipmuseum.com/wp-content/uploads/2023/02/Techno7a-125x125.jpg)
Technopower II 7-Cylinder Radial Engine
Craftsman: Technopower
Catalog #: 2010.19.2
Donor: Jerry Nelson
This Technopower II 7-cylinder radial engine is a 4-cylinder OHV with glow ignition. The normal rpm range is between 1,200-8,000.
![Thompson “Tarantula” 9-Engine Radial Model Aircraft Engine](https://craftsmanshipmuseum.com/wp-content/uploads/2022/12/PK146a-125x125.jpg)
Thompson “Tarantula” 9-Engine Radial Model Aircraft Engine
Craftsman: John V. Thompson
Knapp Collection #: 146
Catalog #: 2008.10.44
Contributor: Paul Knapp
“9-engine” is not a typo. This engine consists of nine individual Cox .049 1-cylinder model airplane engines geared together in an aluminum crankcase.
![Triscamp 3-Cylinder Miniature Radial Engine](https://craftsmanshipmuseum.com/wp-content/uploads/2022/12/PK62b-125x125.jpg)
Triscamp 3-Cylinder Miniature Radial Engine
Craftsman: Robert and Frances Washburn
Knapp Collection #: 62
Catalog #: 2008.10.19
Contributor: Paul Knapp
Mr. Washburn designed and fabricated eight of these tiny 3-cylinder, 2-cycle, methanol-burning radial engines by gearing together three individual engines into one housing.
![Triscamp Engine](https://craftsmanshipmuseum.com/wp-content/uploads/2023/01/713.-TRISCAMP-125x125.jpg)
Triscamp Engine
Craftsman: Robert and Frances Washburn
Knapp Collection #: 713
Catalog #: 2022.8.9
Contributor: Paul Knapp
Robert Washburn designed and fabricated eight of these miniature 3-cylinder, 2-cycle, methanol-burning Triscamp radial engines.
![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.
![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.
Showing 11 of 71 exhibits.