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.
Single-Cylinder .60 Model Airplane Engine
Craftsman: Unknown
Knapp Collection #: 346
Catalog #: 2016.8.3
Contributor: Paul Knapp
This single-cylinder air-cooled .60 size engine was machined from aluminum and steel bar stock and designed to burn methanol on spark ignition.
Single-Cylinder, 4-Cycle Model Airplane Engine
Craftsman: Unknown
Knapp Collection #: 210
Catalog #: 2011.27.17
Contributor: Paul Knapp
This single-cylinder, 4-cycle model airplane engine has a 3/4-inch bore, a 1.0-inch stroke, and it burns methanol on glow ignition.
Super Cyclone 60
Craftsman: Larry Jenno
Knapp Collection #: 222
Catalog #: 2009.9.32
Contributor: Paul Knapp
This Super Cyclone 60 model airplane engine is in the original box. It was reproduced by Larry Jenno of Nevada.
Supercharged Thunderbird Miniature Engine
Craftsman: Scott Motors, Inc.
Knapp Collection #: 121
Catalog #: 2008.16.18
Contributor: Paul Knapp
In 1946, the Thunderbird was advertised as the only miniature engine with a genuine supercharger. The engine is 6”-long, 3”-wide, and 6”-high.
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
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
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
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.
Thompson Designs Flat Four Model Airplane Engine
Craftsman: John V. Thompson
Knapp Collection #: 147
Catalog #: 2008.10.45
Contributor: Paul Knapp
John Thompson used the cylinder assemblies from Honda weed-eater engines to produce this flat four aero engine. His custom crankcase holds the oil for lubrication and the engine runs gasoline with spark ignition.
Three Hirtenberger Patronen VT21 Engines
Craftsman: Hirtenberger Patronen
Knapp Collection #: 396, 397, 398
Catalog #: 2016.8.6
Contributor: Paul Knapp
Three VT21 engines developed by Hirtenberger Patronen, Austria, are shown on a wooden display base. The prototype on the left was manually machined from aluminum and steel bar stock.
Three K&B .60 Prototypes
Craftsman: K&B
Catalog #: 2012.19.4
Donor: Joe Bridi
These three engines are prototype variants of the K&B .60 engine that were tested and used by Joe Bridi in Competition Pattern flying.
Three Morton M1 Model Airplane Engines
Craftsman: Dennis Fadden, Bruce Satra
Knapp Collection #: 415, 87, 413
Catalog #: 2016.8.11a ; 2016.8.11b ; 2016.8.11c
Contributor: Paul Knapp
Three Morton M1 engines sit on a wooden display stand. Mr. Fadden designed several model engines that used Bruce Satra’s Morton castings.
Titan .60
Craftsman: Mark Presling
Catalog #: 2022.3.1
Donor: Roger Taylor
This glow-plug Titan .60 model airplane engine was designed by George Genevro and built by Mark Presling of Australia.
TMN 4-Cycle, Sleeve-Valve Cutaway Engine
Craftsman: Petr Chvatal
Knapp Collection #: 251
Catalog #: 2011.27.29
Contributor: Paul Knapp
The TMN 4-cycle, sleeve-valve cutaway airplane engine was built by Petr Chvatal. After completing only 10 engines, Petr produced a couple of the cutaways to demonstrate its operation.
Showing 20 of 262 exhibits.