Profi Inline 35 Model Airplane Engine
Craftsman: Profi M. E.
Catalog #: 2013.48.6
Contributor: Daniel "Buzz" Brunkow
Known as a “cam axial” engine, this Profi inline 35 has a very unusual mechanism for the pison to drive the propellor shaft. The piston is inline with the propeller shaft.
Quadra .50 Single-Cylinder With 3:1 Belt Drive
Craftsman: Gilardoni
Catalog #: 2012.19.5
Donor: Joe Bridi
This engine built by an Indycar machinist known as “Cally” has a custom made 3:1 belt gearing system. It is marked “Gilardoni” in the cylinder casting. Joe Bridi donated a portion of his engine collection, along with some R/C aircraft, in July 2012. Mr. Bridi is a long-time champion R/C aircraft flyer. At one time […]
Racing Thunderbird Model Airplane Engine
Craftsman: Scott Motors, Inc.
Knapp Collection #: 142
Catalog #: 2008.16.22
Contributor: Paul Knapp
A Racing Thunderbird (Hayward-Connelly) engine, manufactured by Scott Motors, Inc. The engine is 5”-long, 4”-wide, and 6”-high.
RCS 400 5-Cylinder Radial Airplane Engine
Craftsman: Moki, Inc.
Knapp Collection #: 201
Catalog #: 2008.16.43
Contributor: Paul Knapp
This RCS 400cc radial burns a gasoline/oil mixture on spark ignition. The unique electronic ignition utilizes a miniature high tension coil located at each spark plug.
RCV .60 Engine
Craftsman: RCV
Catalog #: 2012.19.7
Donor: Joe Bridi
This RCV .60 was made in England, and operates on glow ignition. The 4-stroke engine put out 0.9 HP on 10% nitro, and offered a 2:1 gear reduction.
Robarts R780 7-Cylinder Radial Engine
Craftsman: Bob Walker
Knapp Collection #: 13
Catalog #: 2011.27.3
Contributor: Paul Knapp
This Robarts R780 7-cylinder radial engine has a bore of 1.125 inches and stroke of 1.125 inches for a total displacement of 7.8 cubic inches.
Rodless Rotary Engine
Craftsman: Peter Grunstra
Catalog #: 2013.42.1
Donor: Peter Grunstra
This 2-cycle rodless rotary engine, suitable for aircraft or autos, is a prototype built by Peter Grunstra.
Royer Model Airplane Engine
Craftsman: Royer Motors
Knapp Collection #: 318
Catalog #: 2012.33.3
Contributor: Paul Knapp
This Royer model airplane engine is 7”-long and 7”-high. The engine has a .785 cu. in. displacement and consists of a sand cast crankcase, front cover, and spoke-fin head.
Saito FA-120, 4-Cycle Cutaway Airplane Engine
Craftsman: Saito Engines
Knapp Collection #: 250
Catalog #: 2011.27.28
Contributor: Paul Knapp
The Saito FA-120, 4-cycle cutaway model airplane engine was manufactured by Saito Engines of Japan, circa 2000.
Satra “R-5” Model Radial Airplane Engine
Craftsman: Bruce Satra
Knapp Collection #: 202
Catalog #: 2008.16.44
Contributor: Paul Knapp
Intrigued by the Morton M5, Bruce Satra built a more robust design which he dubbed the Satra R-5. The bore is .700 and stroke is .625, making the total displacement 1.2 cubic inches.
Satra 0-440, 4-Cylinder Opposed Model Aircraft Engine
Craftsman: Bruce Satra
Knapp Collection #: 63
Catalog #: 2008.16.09
Contributor: Paul Knapp
Bruce Satra, of Utah, engineered and fabricated this 40 cc, 4-cylinder opposed model aircraft engine in the mid-1980s.
Satra 0-440, 4-Cylinder Opposed Model Airplane Engine
Craftsman: Bruce Satra
Knapp Collection #: 203
Catalog #: 2008.16.45
Contributor: Paul Knapp
This 0-440 differs from Bruce Satra’s first version in that it burns gasoline on spark ignition rather than methanol on glow ignition. The engine is 11″-long, 8″-wide, and 7″-high.
Schillings 3-Cylinder (FAN) Engine
Craftsman: Hubert Schillings
Knapp Collection #: 88
Catalog #: 2011.35.3
Contributor: Paul Knapp
This 3-cylinder (fan-configuration) Dual Overhead Cam (DOHC) engine has all cylinders above the center line but uses a master rod and 2 articulating rods like a radial engine.
Schillings 6-Cylinder DOHC Engine
Craftsman: Rolf Luther
Knapp Collection #: 185
Catalog #: 2008.16.33
Contributor: Paul Knapp
This 6-cylinder inline Dual Overhead Cam (DOHC) design has cylinders laid out in a straight line with two camshafts that operate the valves.
Schillings V-Twin DOHC Engine
Craftsman: Hubert Schillings
Knapp Collection #: 89
Catalog #: 2011.35.4
Contributor: Paul Knapp
This 2-cylinder “V” Dual Overhead Cam (DOHC) has cylinders 90 degrees apart and in line with the crankshaft, similar to a V6 or V8 configuration.
Schillings V8 DOHC Engine
Craftsman: Hubert Schillings
Knapp Collection #: 239
Catalog #: 2011.27.22
Contributor: Paul Knapp
This V8 Dual Overhead Cam engine has two rows of cylinders 90 degrees apart. Each row has two camshafts to operate the valves.
Schroeder Display of Multi-Cylinder Cox Engines
Craftsman: Roger Schroeder
Knapp Collection #: 377, 378, 379, 380
Catalog #: 2013.53.7
Contributor: Paul Knapp
Mr. Schroeder was well known for his innovative multi-cylinder engines that utilized Cox .020 and .049 engine parts.
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.
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