Bob Smith Industries 900x250 v2

O.S.


O.S. 4-CYLINDER 4-STROKE

O.S. 4-CYLINDER 4-STROKE

Hot news from Engine Clinic columnist Clarence Lee: we've just received word that O.S. has a new 3ci, 4-cylinder, inline 4-stroke engine under development: the IL-300. Three prototypes have been built and the engine is scheduled for release in July 06, to commemorate the 70th anniversary of O.S. Engines. Specs include a 25.8mm bore, 24mm stroke and 50.2cc displacement (.306.2ci). Not exactly a lightweight, the engine weighs a tad over 5 pounds and swings props in the 18x8 to 20x10 range.

GREAT PLANES 27% EXTRA 330s 1.60 PERFORMANCE SERIES 3D ARF

  It’s an icon at airshows around the world and Performance Series engineering is sure to make this ARF replica of the Extra 330S a popular modeler at the flying field!  Adventurous pilots eager to “step up” to a large, 3d-capable model will find that it’s easy to execute any extreme maneuver imaginable – and […]
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