“Rasant MK III” Diesel Radial Model Airplane Engine
Craftsman: Ron Valentine
Knapp Collection #: 135
Catalog #: 2008.10.39
Contributor: Paul Knapp
This “Rasant MKIII” Diesel engine operates like an inline engine. It is 2.5″-long, 3″-wide, and 2″-high.
1/4 Scale Anzani 3-Cylinder Radial Aircraft Engine
Craftsman: Roger Butzen
Knapp Collection #: 69
Catalog #: 2008.16.10
Contributor: Paul Knapp
This 1/4 scale Anzani 3-cylinder radial aircraft engine runs on gasoline with spark ignition and pressurized lubrication system. The engine is 15”-long, 23”-wide, 12”-high, and weighs 14 lbs. 2 oz.
1/4 Scale Caminez 4-Cylinder Radial Aircraft Engine
Craftsman: Wally Warner
Knapp Collection #: 193
Catalog #: 2008.16.37
Contributor: Paul Knapp
This 1/4 scale Caminez 4-cylinder radial aircraft engine was designed and built by Wally Warner. The engine is 10″-long, 8″-wide, 9″-high, and weighs 7 lbs. 5 oz.
14-Cylinder, Twin-Row Radial Engine
Craftsman: Dennis Fadden
Knapp Collection #: 04
Catalog #: 2008.16.01
Contributor: Paul Knapp
This 1/8 scale 14-cylinder radial engine model operates on regular gasoline with spark ignition and swings a 12-inch diameter propeller.
18-Cylinder, Two-Row Radial Engine
Craftsman: Harold Beckett
Knapp Collection #: 41
Catalog #: 2008.16.06
Contributor: Paul Knapp
Harold Beckett handcrafted this 1/4 scale engine from drawings provided by Sam and Lee Hodgeson. The engine operates on regular gasoline with dual spark ignition.
3-Cylinder Radial Model Airplane Engine
Craftsman: Unknown
Knapp Collection #: 175
Catalog #: 2008.16.28
Contributor: Paul Knapp
This radial engine features a single rocker box that houses both the intake and exhaust rockers, and uses only one large tube to enclose both pushrods.
3-Cylinder Radial Model Airplane Engine
Craftsman: 3W Engines
Knapp Collection #: 12
Catalog #: 2011.27.2
Contributor: Paul Knapp
This spark-ignition 2-cycle engine is composed of three single-cylinder engines geared together within one common crankcase.
3-Cylinder Radial Steam Engine
Craftsman: Rudy Kouhoupt
This 3-cylinder radial steam engine can also be hooked up to run on compressed air.
5-Cylinder Diesel Radial Engine
Craftsman: Ronald Valentine
Knapp Collection #: 253
Catalog #: 2011.27.8
Contributor: Paul Knapp
This is perhaps the smallest Diesel radial engine in the world with a bore of only 5mm and a stroke of 5mm; total displacement of .49ccm.
5-Cylinder Radial Aircraft Engine
Craftsman: Roger Paul
Knapp Collection #: 254
Catalog #: 2011.27.32
Contributor: Paul Knapp
Mr. Paul used a few Morton M5 parts to construct three of these 5-cylinder radial engines between 1978-1981.
5-Cylinder Radial Airplane Engine
Craftsman: Miniature Aircraft Corporation of New York
Knapp Collection #: 291
Catalog #: 2011.32.11
Contributor: Paul Knapp
In 1931, the Miniature Aircraft Corporation of New York advertised a compressed air four-cylinder radial engine made from aluminum alloy with brass heads.
5-Cylinder Radial Model Aircraft Engine
Craftsman: Henry Parohl
Knapp Collection #: 107
Catalog #: 2009.9.18
Contributor: Paul Knapp
This 5-cylinder radial model aircraft engine was designed and built by Henry Parohl circa 1960. The engine is 11”-long, 10”-wide, and 9”-high.
5-Cylinder Radial Model Airplane Engine
Craftsman: Barry Robinson
Knapp Collection #: 143
Catalog #: 2008.10.41
Contributor: Paul Knapp
This is an all-aluminum bar stock engine with a bore of 19 mm, stroke of 19.2 mm and a total displacement of 27.21 cc.
5-Cylinder Radial Model Airplane Engine
Craftsman: Alphonse C. Vassallo
Knapp Collection #: 235
Catalog #: 2009.9.40
Contributor: Paul Knapp
It took about a year to design and build this 5-cylinder radial engine, including the carburetor, which incorporates a built-in choke mechanism. It is completely machined from aluminum and steel bar stock.
5-Cylinder Radial Steam Engine
Craftsman: Rudy Kouhoupt
This 5-cylinder radial airplane engine runs on steam, but can also be hooked up to run on compressed air.
5-Cylinder, 4-Cycle Radial Engine
Craftsman: Ronald Valentine
Knapp Collection #: 246
Catalog #: 2011.32.4
Contributor: Paul Knapp
This 5-cylinder, 4-cycle radial engine runs on methanol with glow ignition using custom made glow plugs. It measures 3.25-inches in diameter.
Anzani 3-Cylinder Fan Engine
Craftsman: Alfred Eichinger
Knapp Collection #: 100
Catalog #: 2008.16.16
Contributor: Paul Knapp
This 1/4 scale Anzani fan engine is 8”-long, 12”-wide, 9”-high, and weighs 3 lbs. 13 oz. The automatic inlet valves are situated inside the head where the intake pipe connects.
Berger 2-Cycle Radial Engine
Craftsman: Lee Berger
Knapp Collection #: 424
Catalog #: 2016.8.17
Contributor: Paul Knapp
This Berger 2-cycle radial aircraft engine is model 7455-11. It measures 11″ in diameter, 10″-long, sports K&B .61 cylinders and heads, and is designed to burn methanol on glow ignition.
Berger 7-Cylinder Radial Model Airplane Engine
Craftsman: Lee Berger
Knapp Collection #: 47
Catalog #: 2008.10.13
Contributor: Paul Knapp
This is the first successful 2-cycle radial engine using a common crankshaft with a master rod and articulating rods inside a common crankcase.
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