Jupiter 220, 2 Cylinder Opposed Model Airplane Engine Manufactured by Farger & Joosten, Germany, early 1980s
These belt-driven overhead-camshaft engines (that also were available as a 1-cylinder) are superbly engineered, but quite heavy, so not practical for competitive flying.
Despite the 37cc capacity, the power output was considered low. The power could be increased with reprofiled camshafts, different plugs and added piston rings. (To re-profile means to machine a different shape to the cams to change when the intake and exhaust valves open and close. This drastically affects the engine’s performance.
Unlike its competitors, the Jupiter was entirely machined from bar stock and no castings were used. The lack of performance and added expense of machining from ingot probably created the lack of sales.
See More Two-Cylinder Engines at: www.flickr.com/photos/15794235@N06/sets/72157649352645204/
See Our Model Engine Collection at: www.flickr.com/photos/15794235@N06/sets/72157602933346098/
Visit Our Photo Sets at: www.flickr.com/photos/15794235@N06/sets
Courtesy of Paul and Paula Knapp
Miniature Engineering Museum
Jupiter 220, 2 Cylinder Opposed Model Airplane Engine Manufactured by Farger & Joosten, Germany, early 1980s
These belt-driven overhead-camshaft engines (that also were available as a 1-cylinder) are superbly engineered, but quite heavy, so not practical for competitive flying.
Despite the 37cc capacity, the power output was considered low. The power could be increased with reprofiled camshafts, different plugs and added piston rings. (To re-profile means to machine a different shape to the cams to change when the intake and exhaust valves open and close. This drastically affects the engine’s performance.
Unlike its competitors, the Jupiter was entirely machined from bar stock and no castings were used. The lack of performance and added expense of machining from ingot probably created the lack of sales.
See More Two-Cylinder Engines at: www.flickr.com/photos/15794235@N06/sets/72157649352645204/
See Our Model Engine Collection at: www.flickr.com/photos/15794235@N06/sets/72157602933346098/
Visit Our Photo Sets at: www.flickr.com/photos/15794235@N06/sets
Courtesy of Paul and Paula Knapp
Miniature Engineering Museum