Seidel 770 Engine
Craftsman: Wolfgang Seidel
Knapp Collection #: 15
Catalog #: 2022.8.1
Contributor: Paul Knapp
This Seidel ST770 engine is a 7-cylinder 70cc (4.17 cubic inch) radial engine with a speed range or 1,000 to 6,000 revolutions per minute (rpm), using a 26-10 propeller.
Seidel Prototype Radial Engine
Craftsman: Wolfgang Seidel
Knapp Collection #: 283
Catalog #: 2011.32.5
Contributor: Paul Knapp
This pre-production model, built in the early 1980s, is one of Mr. Seidel’s first prototypes intended to introduce his engines at trade fairs and model airplane shows.
Seidel ST 1426 14-Cylinder Radial Model Aircraft Engine
Craftsman: Wolfgang Seidel
Knapp Collection #: 56
Catalog #: 2008.10.16
Contributor: Paul Knapp
The ST 1426 is the largest engine in the series, and perhaps the largest model airplane engine commercially sold.
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.
Silver Angel Gas Engine
Craftsman: Birk Petersen
Catalog #: 2016.15.49
Donor: Mark Petersen
Birk’s rendition of the single-cylinder “Silver Angel” gas engine designed by Bob Shores.
Silver Angel Hit-N-Miss Engine
Craftsman: Jack Randall
Catalog #: 2018.18.4
Donor: Katherine Randall
This single-cylinder, 4-cycle, air-cooled hit-n-miss engine was built by Jack Randall and designed by Bob Shores.
Silver Angel Vertical Stationary Engine
Craftsman: Ramon Hoagland
Knapp Collection #: 613
Catalog #: 2019.33.10
Contributor: Paul Knapp
This Silver Angel vertical stationary engine was built by Ramon Hoagland, of Colorado, in 2017.
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 Hit N’ Miss Engine
Craftsman: Unknown Canadian Manual Arts Class
Catalog #: 2011.4.4
Donor: Les Cade
In the 1930s in Canada, this single-cylinder hit n’ miss engine was reportedly built by manual arts students as a class project.
Single-Cylinder Horizontal Gas Hit N’ Miss Engine
Craftsman: Mr. Hallock
Catalog #: 2011.4.5
Donor: Les Cade
This single-cylinder horizontal gas hit n’ miss engine is ungoverned and features a chain driven water pump, model airplane carburetor, and twin cams.
Single-Cylinder Marine Gas Engine
Craftsman: Bill Fowler
Catalog #: 2011.4.7
Donor: Les Cade
This single-cylinder marine gas engine was built by Bill Fowler. This particular water-cooled engine features an Amal motorcycle carburetor.
Single-Cylinder OHC Air-Cooled Demonstration Engine
Craftsman: ELWE Educational Products
Knapp Collection #: 347
Catalog #: 2013.53.1
Contributor: Paul Knapp
This. single-cylinder OHC air-cooled demonstration engine was made in Germany in the 1990s. The engine is 8”-long, 16”-wide, 8”-high, and weighs 8 oz.
Single-Cylinder OHV Engine
Craftsman: Phillip Duclos
Catalog #: 2013.50.3
Donor: George and Dorlene Root
Two external pushrods activate the overhead valves on this single-cylinder IC engine.
Single-Cylinder, 4-Cycle Air-Cooled Engine
Craftsman: Unknown
Knapp Collection #: 285
Catalog #: 2011.27.41
Contributor: Paul Knapp
This model engine was almost completely machined from aluminum and steel bar stock. The cylinder is a modified 2-cycle cylinder that was converted to operate on this 4-cycle engine.
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.
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