Sir William Horizontal Twin Pumping Engine
Craftsman: Ramon Hoagland
Knapp Collection #: 665
Catalog #: 2021.9.3
Contributor: Paul Knapp
This Sir William horizontal twin pumping engine was made by Ramon Hoagland of Colorado.
SJ-10 Turbojet Engine
Craftsman: Mike Early
Knapp Collection #: 588
Catalog #: 2019.11.1
Contributor: Paul Knapp
This SJ-10 Turbojet engine was made from a turbocharger with a combustion system added and it runs on propane. Mike provided plans to jet engine enthusiasts worldwide.
Skylark 2-Cycle Marine Engine
Craftsman: Gerald Smith
Knapp Collection #: 301
Catalog #: 2011.35.8
Contributor: Paul Knapp
The Skylark 2-cycle marine engine was designed and built by Gerald Smith, of the UK. Mr. Smith manufactured over 300 engines from 1922 to the mid-1980s.
Snow Gas Pumping Engine
Craftsman: Ramon Hoagland
Knapp Collection #: 691
Catalog #: 2022.8.2
Contributor: Paul Knapp
This Snow gas pumping engine was built by Ramon Hoagland. The original engine was designed by Doug Kelley.
Snow Horizontal Engine (In Progress)
Craftsman: Pamela Weiss
Contributor: Pamela Weiss
This unfinished Snow horizontal engine is being built by Pamela Weiss from plans in The Home Shop Machinist.
Snow Tandem, Double-Acting Engine (Prototype)
Craftsman: Doug Kelley
Catalog #: 2016.10.1
Donor: Doug Kelley
Doug Kelley designed and built this scale model Snow tandem, double-acting engine. He published his plans for the engine in The Home Shop Machinist magazine.
Sorrel 2-Cylinder Inline Model Boat Engine
Craftsman: Col. James Sorrel
Knapp Collection #: 275
Catalog #: 2011.27.40
Contributor: Paul Knapp
Col. James Sorrel utilized commercial piston and cylinder assemblies to produce his custom-built 2-cylinder racing engines.
Springfield A.1 Single-Cylinder, Two-Cycle Model Engine
Craftsman: Roy E. McAdams
Knapp Collection #: 208
Catalog #: 2008.16.50
Contributor: Paul Knapp
Roy McAdams offered the Springfield A.1 engine (circa 1919) in kit form or completely assembled and ready to run.
Steve Huck V8 Engine
Craftsman: Jeff Lott
Catalog #: 2017.11.1
Contributor: Jeff Lott
This engine was scratch built from billet material taking 2 years to complete. The block and heads are made from 6061T6 aluminum.
Stinger 609 Supercharged V8 Engine
Craftsman: Gary Conley
Knapp Collection #: 290
Catalog #: 2011.32.10
Contributor: Paul Knapp
This “Stinger 609″ supercharged V8 engine is about 10″-tall. The bore is 1.00″ with a .970” stroke. The engine even has a user replaceable oil filter.
Stover Type “K” Stationary Engine
Craftsman: George Luhrs
Knapp Collection #: 109
Catalog #: 2008.10.30
Contributor: Paul Knapp
This miniature Stover was machined from bar stock and utilizes no castings. The engine is 5″-long, 3″-wide, and 4″-high.
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.
Supercharged V8 Racing Engine
Craftsman: James Weber
Knapp Collection #: 168
Catalog #: 2008.16.25
Contributor: Paul Knapp
Closely resembling the Chrysler 300 Hemi, this 1/3 scale model has a 1-inch bore and .900-inch stroke for a total displacement of 5.65 cubic inches.
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.
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