Novoexport .027 cc CO2 Engine
Craftsman: Novoexport
Catalog #: 2009.12.1
Donor: Richard T. Mack
This Russian made Novoexport engine is still brand new in the original package with all Russian writing.
Novoexport 2.5cc 2-cycle Engine
Craftsman: Novoexport
Catalog #: 2009.12.2
Donor: Richard T. Mack
This Novoexport 2.5KP 2-cycle, 1-cylinder engine was donated by Mr. Mack. A very long aluminum tuned exhaust pipe is also included.
O.S. 46AX Model Airplane Engine
Craftsmen: Shigeo Ogawa, O.S.
Catalog #: 2007.7.1
Donor: Art Pesch
This 2-cycle O.S. 46AX model airplane engine is in new condition with the original box.
O.S. FS-91 Cutaway Model Airplane Engine
Craftsmen: Shigeo Ogawa, O.S.
Knapp Collection #: 264
Catalog #: 2011.27.35
Contributor: Paul Knapp
This four-stroke O.S. FS-91 model airplane engine has a partial cutaway of the cylinder block to expose the piston, crankshaft, and camshaft.
O.S. Wankel Model Airplane Engine
Craftsmen: Shigeo Ogawa, O.S.
Catalog #: 2013.49.14
Contributor: Daniel "Buzz" Brunkow
Mr. Brunkow’s collection also includes this OS .3 cubic inch (4.9cc) Wankel rotary model aircraft engine.
Odd Ball Twin Engine
Craftsman: Ron Schindele
Knapp Collection #: 697
Catalog #: 2022.8.8
Contributor: Paul Knapp
This Odd Ball twin engine is a 2-cylinder, 4-stroke air-cooled overhead valve engine with a bore of .687 and stroke of .708.
Offenhauser 270 4-Cylinder Racing Engine (In Progress)
Craftsman: Pamela Weiss
Contributor: Pamela Weiss
This unfinished 1/4 scale Offenhauser 270 4-cylinder racing engine is being built by Pamela Weiss. The scale engine was originally designed by Ron Colonna.
Offy 270 Racing Engine
Craftsman: Roger Butzen
Knapp Collection #: 782
Catalog #: 2024.5.18
Contributor: Paul Knapp
This impressive Offy 270 racing engine was built by Roger Butzen in 2000.
Ohlsson & Rice .60 Engine
Craftsman: Ohlsson & Rice
Catalog #: 2012.19.10
Donor: Joe Bridi
This Ohlsson & Rice .60 engine has spark ignition with a “Slow/Fast” ignition lever. It has a champion spark plug and was mounted on a wooden base.
Ohlsson Engine #1
Craftsman: Irwin “Irv” Ohlsson
Catalog #: 2015.29.1
Contributor: Gus Ohlsson
This is the first running model airplane engine that Irv Ohlsson ever built.
OHV Inline Slant 4-Cylinder Engine
Craftsman: Dick Pretel
Knapp Collection #: 591
Catalog #: 2019.11.4
Contributor: Paul Knapp
This overhead valve inline slant 4-cylinder engine is tilted 30 degrees to resemble the Pontiac Tempest and Chrysler engines used in the early 1960s.
Olds Hit N’ Miss Engine
Craftsman: Russell Anderson
Catalog #: 2019.21.1
Contributor: Steve Anderson
Several engines built by Russell Anderson, including this Olds hit n’ miss, are on display in the Miniature Engineering Craftsmanship Museum.
Olds Hit-n-Miss Engine
Craftsman: Birk Petersen
Catalog #: 2016.15.86
Donor: Mark Petersen
An Olds hit-n-miss engine that was machined by Birk Petersen.
Open Crank 6 Inline Engine
Craftsman: Randall Cox
Knapp Collection #: 586
Catalog #: 2019.10.9
Contributor: Paul Knapp
This Open crank 6 inline engine was designed by Randall Cox, and built by Ramon Hoagland in 2018.
Opposed Piston 2-Cylinder Engine
Craftsman: Ramon Hoagland
Knapp Collection #: 738
Catalog #: 2023.2.4
Contributor: Paul Knapp
This opposed piston 2-cylinder engine is 16″-long, 10″-wide, 9″-high, and weighs about 15 lbs.
Otter 30 Inline 4-Cylinder Boat Engine
Craftsman: Dr. Haydock
Knapp Collection #: 42
Catalog #: 2009.9.04
Contributor: Paul Knapp
Dr. Haydock designed single-cylinder, 2-cylinder and 4-cylinder engines for model boats. He built a handful of these Otter 30 cc engines from his own patterns and castings.
Otto-Langen Atmospheric Engine
Craftsman: Ramon Hoagland
Knapp Collection #: 547
Catalog #: 2017.27.1
Contributor: Paul Knapp
This Otto-Langen atmospheric engine was built at 1/7 scale and measures about 11” in diameter by 24”-high. It is a model of the world’s first production combustion engine.
Pacifier V4 Water-Cooled Engine
Craftsman: Bob Shores
Knapp Collection #: 438
Catalog #: 2016.8.22
Contributor: Paul Knapp
This “Pacifier” V4 water-cooled model engine is a mere 5.5″-wide, 6.5″-long, 6″-high, and weighs about 3 pounds. It has a bore and stroke of .625″ and burns gasoline on spark ignition.
Panther Pup 4-Cylinder Engine
Craftsman: Steve Myers
Knapp Collection #: 351
Catalog #: 2012.33.18
Contributor: Paul Knapp
The Panther Pup engine is an air-cooled, four-cylinder, four-cycle designed to burn gasoline on spark ignition.
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