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.
Titan Twin Engine
Craftsman: Ramon Hoagland
Knapp Collection #: 739
Catalog #: 2023.2.5
Contributor: Paul Knapp
This Titan Twin engine is 16″-long, 11″-wide, 8.5″-high, and weighs about 15 lbs.
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.
Trimble Prototype Single-Cylinder Engine
Craftsman: George Trimble
Knapp Collection #: 157
Catalog #: 2009.9.25
Contributor: Paul Knapp
George Trimble made his first engine in 1958. It’s an air-cooled, four-cycle single that burns gasoline on spark ignition.
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
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.
Twin Flywheel Hit-n-Miss Engine
Craftsman: Phillip Duclos
Catalog #: 2013.50.1
Donor: George and Dorlene Root
This twin flywheel hit-n-miss engine was built by Phillip Duclos, a highly respected model engineer.
Twin Webra .61 (Gear Driven)
Craftsman: Webra
Catalog #: 2012.19.3
Donor: Joe Bridi
Two counter-rotating Webra .61 engines drive a common propeller shaft through a geartrain. It has glow plug ignition.
U-22 Turbojet Model Aircraft Engine
Craftsman: Dennis Fadden
Knapp Collection #: 58
Catalog #: 2009.9.06
Contributor: Paul Knapp
Dennis Fadden built this model jet engine from plans that were most likely from the 1950s.
Unassembled 12-Cylinder Liberty V-12 Engine
Craftsman: Louis Chenot
Catalog #: 2024.2.2
Donor: Louis Chenot
Along with his finished Liberty V-12 engine, which is part of the 1/6 Gar Wood boat, Louis Chenot also built a second 1/6 scale Liberty engine which was not fully assembled.
Unfinished Single-Cylinder Hit-n-Miss Engine
Craftsman: Phillip Duclos
Catalog #: 2013.50.2
Donor: George and Dorlene Root
Very little is known about this unfinished hit-n-miss engine built by Phillip Duclos.
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