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.
Tug Boat With Miniature “Wobbler” Steam Engine
Craftsman: William "Scotty" Hewitt
Donor: Wiliam "Scotty" Hewitt
Scotty Hewitt is a former race car driver who turned to machining as a retirement hobby. He has built several contest winning compressed air race cars modeled after vintage dirt track racers. For this project, a miniature J.C. Tanner tugboat, he took plans for a small oscillating steam engine and scaled them down significantly. Mr. […]
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.
Twin-Column 2-Cylinder Self-Starting Steam Engine
Craftsman: Ramon Hoagland
Knapp Collection #: 666
Catalog #: 2021.9.4
Contributor: Paul Knapp
This twin-column 2-cylinder self-starting steam engine was made by Ramon Hoagland, of Colorado, in 2013.
Two-Cylinder Marine Steam Engine
Craftsman: Rudy Kouhoupt
Donor: Susan Alvaro
This two-cylinder marine steam engine would have been used to power a small boat or launch.
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.
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.
V-4 Marine Steam Engine
Craftsman: William "Scotty" Hewitt
Catalog #: 2008.17.2
Donor: William "Scotty" Hewitt
A miniature oscillating V-4 marine steam engine. The throttle, lubricator, drain valve, and forward/reverse mechanism all work.
V-4 Steam Engine
Craftsman: Rudy Kouhoupt
Donor: Susan Alvaro
Rudy Kouhoupt built this sleek scale model V-4 steam engine with four single-acting cylinders.
V-4 Stirling Cycle Engine
Craftsman: Alphonse C. Vassallo
Knapp Collection #: 233
Catalog #: 2009.9.38
Contributor: Paul Knapp
Among the numerous Stirling cycle engines that Al Vassallo designed and built is this large V-4 workhorse that he attached to a small generator and water pump.
V12 Air-Cooled OHV Model Boat Engine
Craftsman: Unknown
Knapp Collection #: 177
Catalog #: 2008.10.51
Contributor: Paul Knapp
This 60-degree, overhead valve V-12 engine was machined from billet aluminum (bar stock) with cast iron lined cylinders.
Valentine “Blitz” 1-Cylinder Diesel Engine
Craftsman: Ron Valentine
Knapp Collection #: 115
Catalog #: 2008.10.33
Contributor: Paul Knapp
The Valentine “Blitz” Diesel engine was designed and built by Ron Valentine. Mr. Valentine’s engines are among the smallest in the world.
Valentine “Rasant” 1-Cylinder Diesel Engine
Craftsman: Ron Valentine
Knapp Collection #: 116
Catalog #: 2008.10.34
Contributor: Paul Knapp
The Valentine “Rasant” Diesel engine is among the smallest in the world. The 2-cycle engine burns a special Diesel fuel that is less viscous and produces combustion when head and pressure are applied.
Valentine Mini Single Engine
Craftsman: Ronald Valentine
Knapp Collection #: 245
Catalog #: 2011.32.3
Contributor: Paul Knapp
The Valentine mini single-cylinder model airplane engine runs on methanol with glow ignition using custom made glow plugs.
Varo Amp-Champ 12 VDC Field Generator
Craftsman: Varo Inc.
Donor: Joe Martin
The Varo Amp-Champ was powered by an Ohlsson & Rice 2-cycle, single-cylinder model airplane engine (Type 122) that was rated at 3/4 HP at 6,300 RPM.
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