Parohl 3-Cylinder Radial Aircraft Engine
Craftsman: Henry Parohl
Knapp Collection #: 80
Catalog #: 2009.9.10
Contributor: Paul Knapp
This 3-cylinder radial is a one-of-a-kind custom design that runs on regular gasoline and has a spark ignition. The engine is 9”-long, 12”-wide, and 9”-high.
Parohl Single-Cylinder OHV Model Boat Engine
Craftsman: Henry Parohl
Knapp Collection #: 125
Catalog #: 2008.16.20
Contributor: Paul Knapp
To gain efficiency and performance Henry Parohl installed 4 valves in the head of this model boat engine. The engine is 9”-long, 9”-wide, and 10”-high.
Parsell & Weed Hit N’ Miss Engine
Craftsman: Ron Schindele
Knapp Collection #: 599
Catalog #: 2019.33.3
Contributor: Paul Knapp
This 1/3 scale model Parsell & Weed hit n’ miss engine measures 13.5-inches long, 5.5-inches wide, and 8-inches tall on the skid.
Pegasus R9-2800 Radial Engine
Craftsman: Authentic Scale
Knapp Collection #: 420
Catalog #: 2016.8.15
Contributor: Paul Knapp
The Pegasus R9-2800 radial aircraft engine was made by Authentic Scale, of the US, in 2014. This 1/5-scale engine measures about 11 inches in diameter and resembles the front half of a Pratt & Whitney R2800 Double Wasp radial engine.
Pioneer Non-Compressive Internal Combustion Engine
Craftsman: Rudy Kouhoupt
Donor: Susan Alvaro
This unique project is a Pioneer non-compressive internal combustion engine.
Plunket Atmospheric Gas Engine
Craftsman: Roger Butzen
Knapp Collection #: 756
Catalog #: 2024.5.3
Contributor: Paul Knapp
This Plunket atmospheric gas engine was built by Roger Butzen of Texas.
Powerhouse Stationary Engine
Craftsman: Michael Gombert
Knapp Collection #: 530
Catalog #: 2017.27.5
Contributor: Paul Knapp
This Powerhouse stationary engine was designed by Jerry Howell and built by Michael Gombert. Mr. Howell provided the plans and Mike machined it from aluminum and steel bar stock.
Pratt & Whitney 28-Cylinder 4-Row Radial Engine
Craftsman: Dennis Fadden
Knapp Collection #: 344
Catalog #: 2012.33.17
Contributor: Paul Knapp
This Pratt & Whitney 28-cylinder 4-row radial engine is 17”-long, 17”-wide, and 17”-high. It was designed to operate on gasoline and spark ignition, and sports a 12-inch, 3-blade adjustable pitch propeller.
Profi “DOHC 50” 4-Cylinder Inline Racing Engine
Craftsman: Profi M. E.
Knapp Collection #: 237
Catalog #: 2011.27.20
Contributor: Paul Knapp
This 50cc engine burns methanol on glow ignition and sports a pressure lubrication system. It measures 10″-long, 6″-wide, 6″-high, and weighs 2 lbs.
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.
Profi Water-Cooled V-Twin Engine Display
Craftsman: Dr. Bob Kradjian; Profi M. E.
Knapp Collection #: 575
Catalog #: 2019.10.3
Contributor: Paul Knapp
This Profi water-cooled V-twin engine display was put together by Dr. Bob Kradjian. It’s an early water-cooled Profi V-twin (circa 2000) that burns methanol on glow ignition.
Pulsejet Engine
Craftsman: Robert "Larry" DeCou
Catalog #: 2015.42.1
Donor: Robert "Larry" DeCou
This pulsejet engine was custom-built by Robert “Larry” DeCou in his spare time while working as a machinist in the sheet metal and welding shops at Rohr Aircraft.
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.
RCV 60 Sleeve Valve Cutaway Engine
Craftsman: RCV Engines
Knapp Collection #: 271
Catalog #: 2011.27.39
Contributor: Paul Knapp
This RCV 60 sleeve valve cutaway engine was designed and built by RCV Engines. The cylinder liner rotates one time for every four strokes of the crankshaft.
Red Wing Stationary Engine
Craftsman: Harold Beckett
Knapp Collection #: 64
Catalog #: 2009.9.07
Contributor: Paul Knapp
Harold Beckett built this 1/4 scale model Red Wing stationary engine from a casting kit in the mid-1990s. It has a bore of 1.125″, a 2″ stroke and burns gasoline on spark ignition.
Riggle 4-Cylinder Inline Engine
Craftsman: Jim Riggle
Knapp Collection #: 695
Catalog #: 2022.8.6
Contributor: Paul Knapp
This Riggle 4-cylinder inline engine is 9.5″-long, 7″-wide, 7.5″-inches tall, and is mounted on a running stand that houses all necessary accessories to run and monitor the engine.
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