Bentley BR2 Rotary Aero Engine
Craftsman: Paul Knapp
Knapp Collection #: 03
Catalog #: 2008.10.2
Contributor: Paul Knapp
A 1/4 Scale Bentley 9-cylinder rotary engine built by Paul Knapp.
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.
Best Engine Trophy at Pantera International
Craftsman: Roger Butzen
Knapp Collection #: 777A
Catalog #: 2024.5.17
Contributor: Paul Knapp
Roger Butzen won the “Best Engine” trophy at the Pantera International Winter Expo in 2007 for his impressive miniature Challenger V8.
Bobber V-Twin Custom Motorcycle
Craftsman: Stephen J. King
Knapp Collection #: 412
Catalog #: 2016.8.9
Contributor: Paul Knapp
This Bobber V-twin custom motorcycle measures just 13″-long. It’s powered by a custom-built 7cc side-valve 120-degree V-twin.
Bosh Water-Cooled Inline 4-Cylinder Engine
Craftsman: Bob Shores
Knapp Collection #: 440
Catalog #: 2016.8.23
Contributor: Paul Knapp
The Bosh is water-cooled 4-cylinder 40cc inline auto engine designed to burn gasoline on spark ignition.
Boxer 2-Cylinder Opposed Aircraft Engine
Craftsman: Unknown
Knapp Collection #: 154
Catalog #: 2008.16.23
Contributor: Paul Knapp
The maker of this Boxer 2-cylinder opposed aircraft engine is unknown, but it came from Germany. The engine is 9”-long, 9”-wide, and 7”-high.
British MK IV Battle Tank
Craftsman: Stephen J. King
Knapp Collection #: 243
Catalog #: 2011.27.24
Contributor: Paul Knapp
This 1/16 scale model British MK IV battle tank was built from 1/16 steel sheet, and over 1,200 steel rivets were made and set by hand.
Brodbeck Side Port .60 Tether Car Engines
Craftsman: John Brodbeck
Knapp Collection #: 638, 639, 640
Catalog #: 2021.9.1
Contributor: Paul Knapp
These Brodbeck side port .60 tether car engines are presumed to have been built by John Brodbeck in the mid-1940s.
Bruce Macbeth Inline Four Engine
Craftsman: Ramon Hoagland
Knapp Collection #: 740
Catalog #: 2023.2.6
Contributor: Paul Knapp
This Bruce Macbeth inline four engine is 13.5″-long, 12″-wide, 11″-high, and weighs about 20 lbs.
BUSTER K&B Powered Model Airplane
Craftsman: K&B Manufacturing; Premium Manufacturing
Knapp Collection #: 616-2
Catalog #: 2019.33.14
Contributor: Paul Knapp
A special version of the Torpedo Jr. was created for a promotional model airplane produced for the LA Times Newspaper, circa 1951.
Caloric Hot Air Engine
Craftsman: Roger Butzen
Knapp Collection #: 755
Catalog #: 2024.5.2
Contributor: Paul Knapp
This Caloric hot air engine was built by Roger Butzen of Texas.
Challenger Flathead V8
Craftsman: Ron Bement
Knapp Collection #: 496
Catalog #: 2016.44.7
Contributor: Paul Knapp
This Challenger flathead V8 was custom built by Ron Bement. Ron’s version includes several innovations and modifications not found in conventional Challenger engines.
Challenger Flathead V8
Craftsman: Dick Pretel
Knapp Collection #: 589
Catalog #: 2019.11.2
Contributor: Paul Knapp
The only part of this engine typical of the Challenger V8 is the crankcase; everything else was machined from 7075 aluminum, steel, and stainless steel bar stock.
Challenger Flathead V8
Craftsman: Ed Miller, Mike Gombert
Knapp Collection #: 593
Catalog #: 2019.11.6
Contributor: Paul Knapp
This Challenger flathead V8 engine was built by Ed Miller (WY) and Mike Gombert (CO). Typical of Ed’s engines, this Challenger is designed to burn methanol on spark ignition.
Challenger V8 Overhead Valve Conversion
Craftsman: Roger Butzen
Knapp Collection #: 777
Catalog #: 2024.5.16
Contributor: Paul Knapp
Roger Butzen built this Challenger V8 in 2000. The engine includes his custom-designed Chevy 283 overhead valve conversion and a Roots style supercharger.
Challenger V8 Prototype Engine
Craftsman: Bachtold, Thoms, and Dettrick
Knapp Collection #: 08
Catalog #: 2011.27.1
Contributor: Paul Knapp
This Challenger V8 prototype engine is 12″-long, 12″-wide, 14″-high, and weighs 25 lbs. The engine was finished in the mid-1960s.
Cirrus 4-Cylinder Inline Aero Engine
Craftsman: Merritt Zimmerman
Knapp Collection #: 10
Catalog #: 2008.10.4
Contributor: Paul Knapp
1/4 scale model built by Merritt Zimmerman, circa 1989, L=19″, W=8″, H=10″
Cirrus 4-Cylinder Inline Aero Engine
Craftsman: Merritt Zimmerman
Knapp Collection #: 34
Catalog #: 2008.10.9
Contributor: Paul Knapp
Merritt Zimmerman produced his own castings to build 75 of these 1/6-scale Cirrus engines (glow ignition).
Showing 20 of 391 exhibits.